LLMsForHepth/s3-L-3.1-8B-base_v3
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1806.04140
|
Anatoli Fedynitch
|
Anatoli Fedynitch, Felix Riehn, Ralph Engel, Thomas K. Gaisser, Todor
Stanev
|
The hadronic interaction model Sibyll-2.3c and inclusive lepton fluxes
| null |
Phys. Rev. D 100, 103018 (2019)
|
10.1103/PhysRevD.100.103018
| null |
hep-ph astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Muons and neutrinos from cosmic ray interactions in the atmosphere originate
from decays of mesons in air-showers. Sibyll-2.3c aims to give a precise
description of hadronic interactions in the relevant phase space for
conventional and prompt leptons in light of new accelerator data, including
that from the LHC. Sibyll is designed primarily as an event generator for use
in simulation of extensive air showers. Because it has been tuned for forward
physics as well as the central region, it can also be used to calculate
inclusive fluxes. The purpose of this paper is to describe the use of
Sibyll-2.3c for calculation of fluxes of atmospheric leptons.
|
[
{
"created": "Mon, 11 Jun 2018 18:00:00 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jun 2020 07:05:59 GMT",
"version": "v2"
}
] |
2020-06-08
|
[
[
"Fedynitch",
"Anatoli",
""
],
[
"Riehn",
"Felix",
""
],
[
"Engel",
"Ralph",
""
],
[
"Gaisser",
"Thomas K.",
""
],
[
"Stanev",
"Todor",
""
]
] |
Muons and neutrinos from cosmic ray interactions in the atmosphere originate from decays of mesons in air-showers. Sibyll-2.3c aims to give a precise description of hadronic interactions in the relevant phase space for conventional and prompt leptons in light of new accelerator data, including that from the LHC. Sibyll is designed primarily as an event generator for use in simulation of extensive air showers. Because it has been tuned for forward physics as well as the central region, it can also be used to calculate inclusive fluxes. The purpose of this paper is to describe the use of Sibyll-2.3c for calculation of fluxes of atmospheric leptons.
|
hep-th/0209192
|
Mark A. Stern
|
Mark A. Stern
|
Quantum Mechanical Mirror Symmetry, D Branes, and B Fields
|
22 pages
| null | null |
Duke-CGTP-02-08
|
hep-th
| null |
We construct quantum mechanical models which mimic many features of string
theory. We use these models to gain improved descriptions of B fields and
gerbes. We examine analogs of T duality, D branes, and mirror symmetry and
derive quantum mechanical analogs of standard phenomena, such as the
noncommutative geometry induced by a B field.
|
[
{
"created": "Mon, 23 Sep 2002 19:31:32 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Stern",
"Mark A.",
""
]
] |
We construct quantum mechanical models which mimic many features of string theory. We use these models to gain improved descriptions of B fields and gerbes. We examine analogs of T duality, D branes, and mirror symmetry and derive quantum mechanical analogs of standard phenomena, such as the noncommutative geometry induced by a B field.
|
gr-qc/0505099
|
Franklin Felber
|
F. S. Felber
|
Exact Relativistic 'Antigravity' Propulsion
|
4 pages, 3 figures, changed format only, attached 5 AVI files
(animated exact solutions of black holes incident on initially stationary
payloads)
|
AIP Conf.Proc.813:1374-1381,2006
|
10.1063/1.2169322
|
SR05-06
|
gr-qc
| null |
The Schwarzschild solution is used to find the exact relativistic motion of a
payload in the gravitational field of a mass moving with constant velocity. At
radial approach or recession speeds faster than 3^-1/2 times the speed of
light, even a small mass gravitationally repels a payload. At relativistic
speeds, a suitable mass can quickly propel a heavy payload from rest nearly to
the speed of light with negligible stresses on the payload.
|
[
{
"created": "Thu, 19 May 2005 18:57:52 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2005 12:40:05 GMT",
"version": "v2"
}
] |
2010-12-13
|
[
[
"Felber",
"F. S.",
""
]
] |
The Schwarzschild solution is used to find the exact relativistic motion of a payload in the gravitational field of a mass moving with constant velocity. At radial approach or recession speeds faster than 3^-1/2 times the speed of light, even a small mass gravitationally repels a payload. At relativistic speeds, a suitable mass can quickly propel a heavy payload from rest nearly to the speed of light with negligible stresses on the payload.
|
hep-th/9303053
| null |
Alan R. White
|
Analytic Multi-Regge Theory and the Pomeron in QCD : II. Gauge Theory
Analysis
|
149 pages
|
Int.J.Mod.Phys.A8:4755-4896,1993
|
10.1142/S0217751X93001910
|
ANL-HEP-PR-93-16
|
hep-th hep-ph
| null |
The high-energy Regge behavior of gauge theories is studied via the formalism
of Analytic Multi-Regge Theory. Perturbative results for spontaneously-broken
theories are first organised into reggeon diagrams. Unbroken gauge theories are
studied via a reggeon diagram infra-red analysis of symmetry restoration.
Massless fermions play a crucial role and the case of QCD involves the
Super-Critical Pomeron as an essential intermediate stage. An introductory
review of the build up of transverse momentum diagrams and reggeon diagrams
from leading log calculations in gauge theories is presented first. It is then
shown that the results closely reproduce the general structure for multi-regge
amplitudes derived in Part I of the article, allowing the construction of
general reggeon diagrams for spontaneously-broken theories. Next it is argued
that, with a transverse-momentum cut-off, unbroken gauge theories can be
reached through an infra-red limiting process which successively decouples
fundamental representation Higgs fields . The first infra-red limit studied is
the restoration of SU(2) gauge symmetry. The analysis is dominated by the
exponentiation of divergences imposed by Reggeon Unitarity and the contribution
of massless quarks ...
|
[
{
"created": "Tue, 9 Mar 1993 14:33:25 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Mar 1993 10:12:48 GMT",
"version": "v2"
}
] |
2014-11-18
|
[
[
"White",
"Alan R.",
""
]
] |
The high-energy Regge behavior of gauge theories is studied via the formalism of Analytic Multi-Regge Theory. Perturbative results for spontaneously-broken theories are first organised into reggeon diagrams. Unbroken gauge theories are studied via a reggeon diagram infra-red analysis of symmetry restoration. Massless fermions play a crucial role and the case of QCD involves the Super-Critical Pomeron as an essential intermediate stage. An introductory review of the build up of transverse momentum diagrams and reggeon diagrams from leading log calculations in gauge theories is presented first. It is then shown that the results closely reproduce the general structure for multi-regge amplitudes derived in Part I of the article, allowing the construction of general reggeon diagrams for spontaneously-broken theories. Next it is argued that, with a transverse-momentum cut-off, unbroken gauge theories can be reached through an infra-red limiting process which successively decouples fundamental representation Higgs fields . The first infra-red limit studied is the restoration of SU(2) gauge symmetry. The analysis is dominated by the exponentiation of divergences imposed by Reggeon Unitarity and the contribution of massless quarks ...
|
hep-th/9404121
|
Miguel Navarro
|
M. Navarro, J. Guerrero and V. Aldaya
|
Optics, Mechanics and Quantization of Reparametrization Systems
|
15 pages, Latex
|
J.Math.Phys. 35 (1994) 6407-6417
|
10.1063/1.530682
| null |
hep-th
| null |
In this paper we regard the dynamics obtained from Fermat principle as begin
the classical theory of light. We (first-)quantize the action and show how
close we can get to the Maxwell theory. We show that Quantum Geometric Optics
is not a theory of fields in curved space. Considering Classical Mechanics to
be on the same footing, we show the parallelism between Quantum Mechanics and
Quantum Geometric Optics. We show that, due to the reparametrization invariance
of the classical theories, the dynamics of the quantum theories is given by a
Hamiltonian constraint. Some implications of the above analogy in the
quantization of true reparameterization invariant systems are discussed.
|
[
{
"created": "Wed, 20 Apr 1994 09:26:47 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Navarro",
"M.",
""
],
[
"Guerrero",
"J.",
""
],
[
"Aldaya",
"V.",
""
]
] |
In this paper we regard the dynamics obtained from Fermat principle as begin the classical theory of light. We (first-)quantize the action and show how close we can get to the Maxwell theory. We show that Quantum Geometric Optics is not a theory of fields in curved space. Considering Classical Mechanics to be on the same footing, we show the parallelism between Quantum Mechanics and Quantum Geometric Optics. We show that, due to the reparametrization invariance of the classical theories, the dynamics of the quantum theories is given by a Hamiltonian constraint. Some implications of the above analogy in the quantization of true reparameterization invariant systems are discussed.
|
2007.09706
|
Cem Yeti\c{s}mi\c{s}o\u{g}lu
|
Tekin Dereli, Cem Yeti\c{s}mi\c{s}o\u{g}lu
|
The Variational Field Equations of Cosmological Topologically Massive
Supergravity
| null | null |
10.1002/prop.202100009
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the formulation of cosmological topologically massive (simple)
supergravity theory in three-dimensional Riemann-Cartan space-times. We use the
language of exterior differential forms and the properties of Majorana spinors
on 3-dimensional space-times to explicitly demonstrate the local supersymmetry
of the action density involved. Coupled field equations that are complete in
both of their bosonic and fermionic sectors are derived by a first order
variational principle subject to a torsion-constraint imposed by the method of
Lagrange multipliers. We compare these field equations with the partial results
given in the literature using a second order variational formalism.
|
[
{
"created": "Sun, 19 Jul 2020 16:25:39 GMT",
"version": "v1"
}
] |
2021-07-07
|
[
[
"Dereli",
"Tekin",
""
],
[
"Yetişmişoğlu",
"Cem",
""
]
] |
We discuss the formulation of cosmological topologically massive (simple) supergravity theory in three-dimensional Riemann-Cartan space-times. We use the language of exterior differential forms and the properties of Majorana spinors on 3-dimensional space-times to explicitly demonstrate the local supersymmetry of the action density involved. Coupled field equations that are complete in both of their bosonic and fermionic sectors are derived by a first order variational principle subject to a torsion-constraint imposed by the method of Lagrange multipliers. We compare these field equations with the partial results given in the literature using a second order variational formalism.
|
1610.01214
|
Igor Shovkovy
|
E. V. Gorbar, I. Rudenok, I. A. Shovkovy, S. Vilchinskii
|
Anomaly-driven inverse cascade and inhomogeneities in a magnetized
chiral plasma in the early Universe
|
9 pages, 5 multipanel figures
|
Phys. Rev. D 94, 103528 (2016)
|
10.1103/PhysRevD.94.103528
| null |
hep-ph astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By making use of a simple model that captures the key features of the
anomalous Maxwell equations, we study the role of inhomogeneities on the
evolution of magnetic fields in a chiral plasma. We find that inhomogeneities
of the chiral asymmetry by themselves do not prevent the anomaly-driven inverse
cascade and, as in the homogeneous case, the magnetic helicity is transferred
from shorter to longer wavelength helical modes of the magnetic field. However,
we also find that the evolution appears to be sensitive to the effects of
diffusion. In the case when diffusion is negligible, the inverse cascade slows
down considerably compared to the homogeneous scenario. In the case of the
primordial plasma, though, we find that the diffusion is substantial and
efficiently suppresses chiral asymmetry inhomogeneities. As a result, the
inverse cascade proceeds practically in the same way as in the chirally
homogeneous model.
|
[
{
"created": "Tue, 4 Oct 2016 21:40:14 GMT",
"version": "v1"
}
] |
2016-12-07
|
[
[
"Gorbar",
"E. V.",
""
],
[
"Rudenok",
"I.",
""
],
[
"Shovkovy",
"I. A.",
""
],
[
"Vilchinskii",
"S.",
""
]
] |
By making use of a simple model that captures the key features of the anomalous Maxwell equations, we study the role of inhomogeneities on the evolution of magnetic fields in a chiral plasma. We find that inhomogeneities of the chiral asymmetry by themselves do not prevent the anomaly-driven inverse cascade and, as in the homogeneous case, the magnetic helicity is transferred from shorter to longer wavelength helical modes of the magnetic field. However, we also find that the evolution appears to be sensitive to the effects of diffusion. In the case when diffusion is negligible, the inverse cascade slows down considerably compared to the homogeneous scenario. In the case of the primordial plasma, though, we find that the diffusion is substantial and efficiently suppresses chiral asymmetry inhomogeneities. As a result, the inverse cascade proceeds practically in the same way as in the chirally homogeneous model.
|
1710.06445
|
Juan Carlos Criado
|
Juan C. Criado
|
MatchingTools: a Python library for symbolic effective field theory
calculations
|
10 pages. Published version
|
Comput.Phys.Commun. 227 (2018) 42-50
|
10.1016/j.cpc.2018.02.016
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
MatchingTools is a Python library for doing symbolic calculations in
effective field theory. It provides the tools to construct general models by
defining their field content and their interaction Lagrangian. Once a model is
given, the heavy particles can be integrated out at the tree level to obtain an
effective Lagrangian in which only the light particles appear. After
integration, some of the terms of the resulting Lagrangian might not be
independent. MatchingTools contains functions for transforming these terms to
rewrite them in terms of any chosen set of operators.
|
[
{
"created": "Tue, 17 Oct 2017 18:00:34 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Aug 2018 12:49:38 GMT",
"version": "v2"
}
] |
2018-08-09
|
[
[
"Criado",
"Juan C.",
""
]
] |
MatchingTools is a Python library for doing symbolic calculations in effective field theory. It provides the tools to construct general models by defining their field content and their interaction Lagrangian. Once a model is given, the heavy particles can be integrated out at the tree level to obtain an effective Lagrangian in which only the light particles appear. After integration, some of the terms of the resulting Lagrangian might not be independent. MatchingTools contains functions for transforming these terms to rewrite them in terms of any chosen set of operators.
|
1801.01591
|
Mauricio Cataldo MC
|
Mauricio Cataldo and Norman Cruz
|
The Hubble IR cutoff in holographic ellipsoidal cosmologies
|
To be published in EPJC, 10 pages, 2 figures
| null |
10.1140/epjc/s10052-017-5508-z
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is well known that for spatially flat FRW cosmologies, the holographic
dark energy disfavours the Hubble parameter as a candidate for the IR cutoff.
For overcoming this problem, we explore the use of this cutoff in holographic
ellipsoidal cosmological models, and derive the general ellipsoidal metric
induced by a such holographic energy density. Despite the drawbacks that this
cutoff presents in homogeneous and isotropic universes, based on this general
metric, we developed a suitable ellipsoidal holographic cosmological model,
filled with a dark matter and a dark energy components. At late time stages,
the cosmic evolution is dominated by a holographic anisotropic dark energy with
barotropic equations of state. The cosmologies expand in all directions in
accelerated manner. Since the ellipsoidal cosmologies given here are not
asymptotically FRW, the deviation from homogeneity and isotropy of the universe
on large cosmological scales remains constant during all cosmic evolution. This
feature allows studied holographic ellipsoidal cosmologies to be ruled by an
equation of state $\omega=p/\rho$, whose range belongs to quintessence or even
phantom matter.
|
[
{
"created": "Fri, 5 Jan 2018 00:40:21 GMT",
"version": "v1"
}
] |
2018-02-14
|
[
[
"Cataldo",
"Mauricio",
""
],
[
"Cruz",
"Norman",
""
]
] |
It is well known that for spatially flat FRW cosmologies, the holographic dark energy disfavours the Hubble parameter as a candidate for the IR cutoff. For overcoming this problem, we explore the use of this cutoff in holographic ellipsoidal cosmological models, and derive the general ellipsoidal metric induced by a such holographic energy density. Despite the drawbacks that this cutoff presents in homogeneous and isotropic universes, based on this general metric, we developed a suitable ellipsoidal holographic cosmological model, filled with a dark matter and a dark energy components. At late time stages, the cosmic evolution is dominated by a holographic anisotropic dark energy with barotropic equations of state. The cosmologies expand in all directions in accelerated manner. Since the ellipsoidal cosmologies given here are not asymptotically FRW, the deviation from homogeneity and isotropy of the universe on large cosmological scales remains constant during all cosmic evolution. This feature allows studied holographic ellipsoidal cosmologies to be ruled by an equation of state $\omega=p/\rho$, whose range belongs to quintessence or even phantom matter.
|
gr-qc/0012110
|
Sascha Husa
|
Sascha Husa, Manuela Campanelli, Roberto Gomez, Jeffrey Winicour and
Yosef Zlochower
|
Colliding black holes from a null point of view: the close limit
|
2 pages, contribution to the 9th Marcel Grossmann meeting (MG9),
Rome, July 2000
| null | null | null |
gr-qc
| null |
We present a characteristic algorithm for computing the perturbations of a
Schwarzschild spacetime by means of solving the Teukolsky equations. Our
methods and results are expected to have direct bearing on the study of binary
black holes presently underway using a fully {\em nonlinear} characteristic
code \cite{Gomez98a}.
|
[
{
"created": "Fri, 29 Dec 2000 17:23:47 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Husa",
"Sascha",
""
],
[
"Campanelli",
"Manuela",
""
],
[
"Gomez",
"Roberto",
""
],
[
"Winicour",
"Jeffrey",
""
],
[
"Zlochower",
"Yosef",
""
]
] |
We present a characteristic algorithm for computing the perturbations of a Schwarzschild spacetime by means of solving the Teukolsky equations. Our methods and results are expected to have direct bearing on the study of binary black holes presently underway using a fully {\em nonlinear} characteristic code \cite{Gomez98a}.
|
gr-qc/0703077
|
Yury F. Pirogov
|
Yu. F. Pirogov
|
Scalar graviton and the modified black holes
|
9 pages, typos corrected
|
Phys.Atom.Nucl.71:289-293,2008; Phys.Atom.Nucl.71:1651,2008
|
10.1007/s11450-008-2009-4 10.1134/S1063778808090238
| null |
gr-qc astro-ph hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Under the explicit violation of the general covariance to the unimodular one,
the effect of the emerging scalar graviton on the static spherically symmetric
metrics is studied. The main results are three-fold. First, there appears the
two-parametric family of such metrics, instead of the one-parametric black-hole
family in General Relativity (GR). Second, there may exist the one-parametric
subfamily describing a pure gravitational object, the ``graviball'', missing in
GR. Third, in a simplifying assumption, all the metrics possess the correct
Newton's limit as in GR.
|
[
{
"created": "Wed, 14 Mar 2007 19:16:41 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Mar 2008 15:21:49 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jul 2008 16:01:47 GMT",
"version": "v3"
}
] |
2008-11-26
|
[
[
"Pirogov",
"Yu. F.",
""
]
] |
Under the explicit violation of the general covariance to the unimodular one, the effect of the emerging scalar graviton on the static spherically symmetric metrics is studied. The main results are three-fold. First, there appears the two-parametric family of such metrics, instead of the one-parametric black-hole family in General Relativity (GR). Second, there may exist the one-parametric subfamily describing a pure gravitational object, the ``graviball'', missing in GR. Third, in a simplifying assumption, all the metrics possess the correct Newton's limit as in GR.
|
1504.04496
|
Jose Edelstein
|
Xian O. Camanho, Jose D. Edelstein, Andres Gomberoff, J. Anibal
Sierra-Garcia
|
On AdS to dS transitions in higher-curvature gravity
|
12 pages, 3 figures; v2: comments and references added
| null | null | null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the possible existence of gravitational phase transitions from AdS
to dS geometries in the context of higher-curvature gravities. We use
Lanczos-Gauss-Bonnet (LGB) theory with a positive cosmological constant as a
toy model. This theory has two maximally symmetric vacua with positive (dS) and
negative (AdS) constant curvature. We show that a phase transition from the AdS
vacuum to a dS black hole geometry takes place when the temperature reaches a
critical value. The transition is produced by nucleation of bubbles of the new
phase that expand afterwards. We claim that this phenomenon is not particular
to the model under study, and shall also be part of generic gravitational
theories with higher-curvature terms.
|
[
{
"created": "Fri, 17 Apr 2015 12:58:57 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jul 2015 00:04:57 GMT",
"version": "v2"
}
] |
2015-07-28
|
[
[
"Camanho",
"Xian O.",
""
],
[
"Edelstein",
"Jose D.",
""
],
[
"Gomberoff",
"Andres",
""
],
[
"Sierra-Garcia",
"J. Anibal",
""
]
] |
We study the possible existence of gravitational phase transitions from AdS to dS geometries in the context of higher-curvature gravities. We use Lanczos-Gauss-Bonnet (LGB) theory with a positive cosmological constant as a toy model. This theory has two maximally symmetric vacua with positive (dS) and negative (AdS) constant curvature. We show that a phase transition from the AdS vacuum to a dS black hole geometry takes place when the temperature reaches a critical value. The transition is produced by nucleation of bubbles of the new phase that expand afterwards. We claim that this phenomenon is not particular to the model under study, and shall also be part of generic gravitational theories with higher-curvature terms.
|
hep-th/9505126
|
Matthias Heyssler
|
Matthias Heyssler (Department of Physics, Durham) Alex C. Kalloniatis
(Max-Planck-Institut f\"ur Kernphysik,Heidelberg)
|
Costituent Quark Picture out of QCD in two dimensions - on the
Light-Cone
|
13 pages, uses elsart.sty 2 Postscript figures, uses epsf.sty
'elsart.sty' and 'elsart12.sty' are available via anonymous-ftp at
ftp://ftp.tex.ac.uk/tex-archive/macros/latex/contrib/supported/elsevier
|
Phys.Lett. B354 (1995) 453-459
|
10.1016/0370-2693(95)00654-4
|
MPIH-V25-1994
|
hep-th hep-ph
| null |
Using DLCQ as a nonperturbative method, we test Fock-space truncations in
${\rm QCD}_{1+1}$ by studying the mass spectra of hadrons in colour SU(2) and
SU(3) at finite harmonic resolution $K$. We include $q\bar q q\bar q$ states
for mesons and up to $qqq q\bar q$ states for baryons. With this truncation, we
give `predictions' for the masses of the first five states where finite $K$
effects are minimal.
|
[
{
"created": "Sat, 20 May 1995 01:54:21 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Heyssler",
"Matthias",
"",
"Department of Physics, Durham"
],
[
"Kalloniatis",
"Alex C.",
"",
"Max-Planck-Institut für Kernphysik,Heidelberg"
]
] |
Using DLCQ as a nonperturbative method, we test Fock-space truncations in ${\rm QCD}_{1+1}$ by studying the mass spectra of hadrons in colour SU(2) and SU(3) at finite harmonic resolution $K$. We include $q\bar q q\bar q$ states for mesons and up to $qqq q\bar q$ states for baryons. With this truncation, we give `predictions' for the masses of the first five states where finite $K$ effects are minimal.
|
1701.02294
|
Marc P. Bellon
|
Marc P. Bellon
|
Alien Calculus and non perturbative effects in Quantum Field Theory
|
4 pages, double-column
|
Front. Phys. (2016) 11: 113201
|
10.1007/s11467-016-0580-7
| null |
hep-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In many domains of physics, methods are needed to deal with non-perturbative
aspects. I want here to argue that a good approach is to work on the Borel
transforms of the quantities of interest, the singularities of which give
non-perturbative contributions. These singularities in many cases can be
largely determined by using the alien calculus developed by Jean \'Ecalle. My
main example will be the two point function of a massless theory given as a
solution of a renormalization group equation.
|
[
{
"created": "Mon, 9 Jan 2017 18:33:58 GMT",
"version": "v1"
}
] |
2017-01-10
|
[
[
"Bellon",
"Marc P.",
""
]
] |
In many domains of physics, methods are needed to deal with non-perturbative aspects. I want here to argue that a good approach is to work on the Borel transforms of the quantities of interest, the singularities of which give non-perturbative contributions. These singularities in many cases can be largely determined by using the alien calculus developed by Jean \'Ecalle. My main example will be the two point function of a massless theory given as a solution of a renormalization group equation.
|
hep-th/9804204
|
H. W. Braden
|
H. W. Braden, V. Varela
|
The Bogomolny Equations and Solutions for Einstein-Yang-Mills-Dilaton-
$\sigma$ Models
|
24 pages LaTex, 1 Figure, revised text for publication
|
Phys.Rev.D58:124020,1998
|
10.1103/PhysRevD.58.124020
|
MS-98-006
|
hep-th gr-qc
| null |
We derive Bogomolny equations for an Einstein-Yang-Mills-dilaton-$\sigma$
model (EYMD-$\sigma$) on a static spacetime, showing that the Einstein
equations are satisfied if and only if the associated (conformally scaled)
three-metric is flat. These are precisely the static metrics for which
super-covariantly constant spinors exist. We study some general properties of
these equations and then consider the problem of obtaining axially symmetric
solutions for the gauge group SU(2).
|
[
{
"created": "Thu, 30 Apr 1998 16:27:45 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Sep 1998 14:16:21 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Braden",
"H. W.",
""
],
[
"Varela",
"V.",
""
]
] |
We derive Bogomolny equations for an Einstein-Yang-Mills-dilaton-$\sigma$ model (EYMD-$\sigma$) on a static spacetime, showing that the Einstein equations are satisfied if and only if the associated (conformally scaled) three-metric is flat. These are precisely the static metrics for which super-covariantly constant spinors exist. We study some general properties of these equations and then consider the problem of obtaining axially symmetric solutions for the gauge group SU(2).
|
hep-th/0408134
|
Michael Walker
|
M.L.Walker
|
Three point SUSY Ward identities without Ghosts
|
20 pages, no figures, typos corrected
|
JHEP0412:011,2004
|
10.1088/1126-6708/2004/12/011
| null |
hep-th
| null |
We utilise a non-local gauge transform which renders the entire action of
SUSY QED invariant and respects the SUSY algebra modulo the gauge-fixing
condition, to derive two- and three-point ghost-free SUSY Ward identities in
SUSY QED. We use the cluster decomposition principle to find the Green's
function Ward identities and then takes linear combinations of the latter to
derive identities for the proper functions.
|
[
{
"created": "Wed, 18 Aug 2004 12:30:50 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Sep 2004 01:29:41 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Walker",
"M. L.",
""
]
] |
We utilise a non-local gauge transform which renders the entire action of SUSY QED invariant and respects the SUSY algebra modulo the gauge-fixing condition, to derive two- and three-point ghost-free SUSY Ward identities in SUSY QED. We use the cluster decomposition principle to find the Green's function Ward identities and then takes linear combinations of the latter to derive identities for the proper functions.
|
2303.05298
|
Vincenzo Mariani
|
Vincenzo Mariani, Agn\`es Fienga, Olivier Minazzoli
|
Testing the mass of the graviton with Bayesian planetary numerical
ephemerides B-INPOP
|
29 pages without appendix and 45 with appendices
| null | null | null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use MCMC to sample the posterior distribution of the mass of the graviton
-- assumed here to be manifest through a Yukawa suppression of the Newtonian
potential -- by using INPOP planetary ephemerides. The main technical
difficulty is the lack of analytical formulation for the forward problem and
the cost in term of computation time for its numerical estimation. To overcome
these problems we approximate an interpolated likelihood for the MCMC with the
Gaussian Process Regression. We also propose a possible way to assess the
uncertainty of approximation of the likelihood by mean of some realization of
the Gaussian Process. At the end of the procedure, a 99.7% confidence level
threshold value is found at $1.01 \times 10^{-24} \; eV c^{-2}$ (resp.
$\lambda_g \geq 122.48 \times 10^{13} \; km$), representing an improvement of 1
order of magnitude relative to the previous estimation of Bernus et al. 2020.
Beyond this limit, no clear information is provided by the current state of the
planetary ephemerides.
|
[
{
"created": "Thu, 9 Mar 2023 14:46:02 GMT",
"version": "v1"
}
] |
2023-03-10
|
[
[
"Mariani",
"Vincenzo",
""
],
[
"Fienga",
"Agnès",
""
],
[
"Minazzoli",
"Olivier",
""
]
] |
We use MCMC to sample the posterior distribution of the mass of the graviton -- assumed here to be manifest through a Yukawa suppression of the Newtonian potential -- by using INPOP planetary ephemerides. The main technical difficulty is the lack of analytical formulation for the forward problem and the cost in term of computation time for its numerical estimation. To overcome these problems we approximate an interpolated likelihood for the MCMC with the Gaussian Process Regression. We also propose a possible way to assess the uncertainty of approximation of the likelihood by mean of some realization of the Gaussian Process. At the end of the procedure, a 99.7% confidence level threshold value is found at $1.01 \times 10^{-24} \; eV c^{-2}$ (resp. $\lambda_g \geq 122.48 \times 10^{13} \; km$), representing an improvement of 1 order of magnitude relative to the previous estimation of Bernus et al. 2020. Beyond this limit, no clear information is provided by the current state of the planetary ephemerides.
|
gr-qc/9801072
|
Ioan Vancea
|
I. V. Vancea (IFT Unesp)
|
Gravity and Duality between Coordinates and Matter Fields
|
11 pages, REVTeX file, a new paragraph added, to be published in
Phys. Lett. B
| null | null | null |
gr-qc hep-th
| null |
We use the duality between the local Cartezian coordinates and the solutions
of the Klein-Gordon equation to parametrize locally the spacetime in terms of
wave functions and prepotentials. The components of metric, metric connection,
curvature as well as the Einstein equation are given in this parametrization.
We also discuss the local duality between coordinates and quantum fields and
the metric in this later reparametrization.
|
[
{
"created": "Wed, 21 Jan 1998 10:16:43 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Feb 2000 12:08:33 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Mar 2000 12:45:33 GMT",
"version": "v3"
}
] |
2007-05-23
|
[
[
"Vancea",
"I. V.",
"",
"IFT Unesp"
]
] |
We use the duality between the local Cartezian coordinates and the solutions of the Klein-Gordon equation to parametrize locally the spacetime in terms of wave functions and prepotentials. The components of metric, metric connection, curvature as well as the Einstein equation are given in this parametrization. We also discuss the local duality between coordinates and quantum fields and the metric in this later reparametrization.
|
hep-th/9208072
|
Francois Gieres
|
Francois Gieres and Stefan Theisen
|
Superconformally covariant operators and super W algebras
|
23 pages, LATEX, MPI-Ph/92-66 and KA-THEP-7/92
|
J.Math.Phys. 34 (1993) 5964-5985
|
10.1063/1.530243
| null |
hep-th
| null |
We study superdifferential operators of order $2n+1$ which are covariant with
respect to superconformal changes of coordinates on a compact super Riemann
surface. We show that all such operators arise from super M\"obius covariant
ones. A canonical matrix representation is presented and applications to
classical super W algebras are discussed.
|
[
{
"created": "Thu, 27 Aug 1992 21:49:16 GMT",
"version": "v1"
}
] |
2009-10-22
|
[
[
"Gieres",
"Francois",
""
],
[
"Theisen",
"Stefan",
""
]
] |
We study superdifferential operators of order $2n+1$ which are covariant with respect to superconformal changes of coordinates on a compact super Riemann surface. We show that all such operators arise from super M\"obius covariant ones. A canonical matrix representation is presented and applications to classical super W algebras are discussed.
|
hep-th/9508075
|
Fosco Cesar Daniel
|
D. G. Barcy, C. D. Fosco and L. E. Oxman
|
On bosonization in $3$ dimensions
|
11 pages, Latex, omitted references added, typos corrected
|
Phys.Lett. B375 (1996) 267-272
|
10.1016/0370-2693(96)00224-9
| null |
hep-th cond-mat
| null |
A recently proposed path-integral bosonization scheme for massive fermions in
$3$ dimensions is extended by keeping the full momentum-dependence of the
one-loop vacuum polarization tensor. This makes it possible to discuss both the
massive and massless fermion cases on an equal footing, and moreover the
results it yields for massless fermions are consistent with the ones of
another, seemingly different, canonical quantization approach to the problem of
bosonization for a massless fermionic field in $3$ dimensions.
|
[
{
"created": "Wed, 16 Aug 1995 14:33:30 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Aug 1995 15:56:03 GMT",
"version": "v2"
}
] |
2009-10-28
|
[
[
"Barcy",
"D. G.",
""
],
[
"Fosco",
"C. D.",
""
],
[
"Oxman",
"L. E.",
""
]
] |
A recently proposed path-integral bosonization scheme for massive fermions in $3$ dimensions is extended by keeping the full momentum-dependence of the one-loop vacuum polarization tensor. This makes it possible to discuss both the massive and massless fermion cases on an equal footing, and moreover the results it yields for massless fermions are consistent with the ones of another, seemingly different, canonical quantization approach to the problem of bosonization for a massless fermionic field in $3$ dimensions.
|
1210.2255
|
Yu-tin Huang
|
Yu-tin Huang and Henrik Johansson
|
Equivalent D=3 Supergravity Amplitudes from Double Copies of
Three-Algebra and Two-Algebra Gauge Theories
|
5 pages, published version in PRL
| null |
10.1103/PhysRevLett.110.171601
|
CERN-PH-TH/2012-254, MCTP-12-22, Saclay--IPhT--T12/076
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that three-dimensional supergravity amplitudes can be obtained as
double copies of either three-algebra super-Chern-Simons matter theory or that
of two-algebra super-Yang-Mills theory, when either theory is organized to
display the color-kinematics duality. We prove that only helicity-conserving
four-dimensional gravity amplitudes have nonvanishing descendants when reduced
to three dimensions; implying the vanishing of odd-multiplicity S-matrix
elements, in agreement with Chern-Simons matter theory. We explicitly verify
the double-copy correspondence at four and six points for N=12,10,8
supergravity theories and discuss its validity for all multiplicity.
|
[
{
"created": "Mon, 8 Oct 2012 12:14:22 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Apr 2013 02:00:46 GMT",
"version": "v2"
}
] |
2013-05-01
|
[
[
"Huang",
"Yu-tin",
""
],
[
"Johansson",
"Henrik",
""
]
] |
We show that three-dimensional supergravity amplitudes can be obtained as double copies of either three-algebra super-Chern-Simons matter theory or that of two-algebra super-Yang-Mills theory, when either theory is organized to display the color-kinematics duality. We prove that only helicity-conserving four-dimensional gravity amplitudes have nonvanishing descendants when reduced to three dimensions; implying the vanishing of odd-multiplicity S-matrix elements, in agreement with Chern-Simons matter theory. We explicitly verify the double-copy correspondence at four and six points for N=12,10,8 supergravity theories and discuss its validity for all multiplicity.
|
0804.2044
|
Shumpei Uno
|
Masashi Hayakawa and Shunpei Uno
|
QED in finite volume and finite size scaling effect on electromagnetic
properties of hadrons
|
36 pages, 6 figures
|
Prog.Theor.Phys.120:413-441,2008
|
10.1143/PTP.120.413
| null |
hep-ph hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
On account of its application to the present and future analysis of the
virtual photon correction to the hadronic properties by means of lattice QCD
simulation, we initiate the study of the finite size scaling effect on the QED
correction using low energy effective theory of QCD with QED. For this purpose,
we begin with formulating a new QED on the space with finite volume. By
adapting this formalism to the partially quenched QCD with electromagnetism, we
explore the qualitative features of the finite size scaling effect on the
electromagnetic correction to the masses of pseudo-Goldstone bosons.
|
[
{
"created": "Sun, 13 Apr 2008 07:05:00 GMT",
"version": "v1"
}
] |
2008-12-18
|
[
[
"Hayakawa",
"Masashi",
""
],
[
"Uno",
"Shunpei",
""
]
] |
On account of its application to the present and future analysis of the virtual photon correction to the hadronic properties by means of lattice QCD simulation, we initiate the study of the finite size scaling effect on the QED correction using low energy effective theory of QCD with QED. For this purpose, we begin with formulating a new QED on the space with finite volume. By adapting this formalism to the partially quenched QCD with electromagnetism, we explore the qualitative features of the finite size scaling effect on the electromagnetic correction to the masses of pseudo-Goldstone bosons.
|
1405.6116
|
Kirill Bronnikov
|
K.A. Bronnikov, J.C. Fabris, R. Silveira, O.B. Zaslavskii
|
Dilaton gravity, charged dust, and (quasi-) black holes
|
revtex4, 4 pages, 1 figure of 3 parts. A brief presentation of main
results (not all) of arXiv:1312.4891
|
Phys. Rev. D 89, 107501 (2014)
|
10.1103/PhysRevD.89.107501
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider Einstein-Maxwell-dilaton gravity with charged dust and
interaction of the form $P(\chi) F_{\mu\nu} F^{\mu\nu}$, where $P(\chi)$ is an
arbitrary function of the dilaton field $\chi$ that can be normal or phantom.
For any regular $P(\chi)$, static configurations are possible with arbitrary
functions $g_{00} = \exp(2\gamma(x^i))$ ($i=1,2,3$) and $\chi = \chi(\gamma)$,
without any assumption of spatial symmetry. The classical Majumdar-Papapetrou
system is restored by putting $\chi =$ const. Among possible solutions are
black-hole (BH) and quasi-black-hole (QBH) ones. Some general results on BH and
QBH properties are deduced and confirmed by examples. It is found, in
particular, that asymptotically flat BHs and QBHs can exist with positive
energy densities of matter and both scalar and electromagnetic fields.
|
[
{
"created": "Fri, 23 May 2014 16:42:37 GMT",
"version": "v1"
}
] |
2014-05-26
|
[
[
"Bronnikov",
"K. A.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Silveira",
"R.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] |
We consider Einstein-Maxwell-dilaton gravity with charged dust and interaction of the form $P(\chi) F_{\mu\nu} F^{\mu\nu}$, where $P(\chi)$ is an arbitrary function of the dilaton field $\chi$ that can be normal or phantom. For any regular $P(\chi)$, static configurations are possible with arbitrary functions $g_{00} = \exp(2\gamma(x^i))$ ($i=1,2,3$) and $\chi = \chi(\gamma)$, without any assumption of spatial symmetry. The classical Majumdar-Papapetrou system is restored by putting $\chi =$ const. Among possible solutions are black-hole (BH) and quasi-black-hole (QBH) ones. Some general results on BH and QBH properties are deduced and confirmed by examples. It is found, in particular, that asymptotically flat BHs and QBHs can exist with positive energy densities of matter and both scalar and electromagnetic fields.
|
0810.0953
|
A. V. Luchinsky
|
V. Kartvelishvili, A. V. Luchinsky, A. A. Novoselov
|
Double vector quarkonia production in exclusive Higgs boson decays
|
6 pages, 4 figures; Submitted to Phys. Lett. B; minimal changes:
typos corrected, references added
|
Phys.Rev.D79:114015,2009
|
10.1103/PhysRevD.79.114015
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Partial decay widths and branching fractions are calculated for the exclusive
decays of the Standard Model Higgs boson into a pair of vector quarkonium
states, $ H\to J/\psi J/\psi, H\to \Upsilon \Upsilon, H\to J/\psi \phi, H\to
J/\psi \Upsilon$, with relativistic corrections due to quark motion in mesons
taken into account.
|
[
{
"created": "Mon, 6 Oct 2008 13:18:26 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Oct 2008 06:23:43 GMT",
"version": "v2"
}
] |
2009-07-30
|
[
[
"Kartvelishvili",
"V.",
""
],
[
"Luchinsky",
"A. V.",
""
],
[
"Novoselov",
"A. A.",
""
]
] |
Partial decay widths and branching fractions are calculated for the exclusive decays of the Standard Model Higgs boson into a pair of vector quarkonium states, $ H\to J/\psi J/\psi, H\to \Upsilon \Upsilon, H\to J/\psi \phi, H\to J/\psi \Upsilon$, with relativistic corrections due to quark motion in mesons taken into account.
|
2102.11145
|
Tuomas Tenkanen
|
Philipp M. Schicho, Tuomas V. I. Tenkanen and Juuso \"Osterman
|
Robust approach to thermal resummation: Standard Model meets a singlet
|
86 pages, 2 figures and 141 Feynman diagrams
| null |
10.1007/JHEP06(2021)130
| null |
hep-ph astro-ph.CO gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Perturbation theory alone fails to describe thermodynamics of the electroweak
phase transition. We review a technique combining perturbative and
non-perturbative methods to overcome this challenge. Accordingly, the principal
theme is a tutorial of high-temperature dimensional reduction. We present an
explicit derivation with a real singlet scalar and compute the thermal
effective potential at two-loop order. In particular, we detail the dimensional
reduction for a real-singlet extended Standard Model. The resulting effective
theory will impact future non-perturbative studies based on lattice simulations
as well as purely perturbative investigations.
|
[
{
"created": "Mon, 22 Feb 2021 16:15:59 GMT",
"version": "v1"
}
] |
2021-07-07
|
[
[
"Schicho",
"Philipp M.",
""
],
[
"Tenkanen",
"Tuomas V. I.",
""
],
[
"Österman",
"Juuso",
""
]
] |
Perturbation theory alone fails to describe thermodynamics of the electroweak phase transition. We review a technique combining perturbative and non-perturbative methods to overcome this challenge. Accordingly, the principal theme is a tutorial of high-temperature dimensional reduction. We present an explicit derivation with a real singlet scalar and compute the thermal effective potential at two-loop order. In particular, we detail the dimensional reduction for a real-singlet extended Standard Model. The resulting effective theory will impact future non-perturbative studies based on lattice simulations as well as purely perturbative investigations.
|
1611.03525
|
Antonia Micol Frassino
|
Antonia M. Frassino, Robert B. Mann, Fil Simovic
|
Critical points in Lovelock Black Holes
|
8 pages, 4 figures. Contribution to the Proceedings of the Second
Karl Schwarzschild Meeting, Frankfurt, 20-24 July 2015
| null | null | null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We review some of the results obtained by introducing a thermodynamic
pressure via the cosmological constant in a class of higher curvature theories
known as Lovelock gravity. In particular, we focus on a specific relation
between the higher-order Lovelock couplings that introduces a peculiar isolated
critical point for hyperbolic black holes characterized by non-standard
critical exponents.
|
[
{
"created": "Thu, 10 Nov 2016 21:47:19 GMT",
"version": "v1"
}
] |
2016-11-14
|
[
[
"Frassino",
"Antonia M.",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Simovic",
"Fil",
""
]
] |
We review some of the results obtained by introducing a thermodynamic pressure via the cosmological constant in a class of higher curvature theories known as Lovelock gravity. In particular, we focus on a specific relation between the higher-order Lovelock couplings that introduces a peculiar isolated critical point for hyperbolic black holes characterized by non-standard critical exponents.
|
1501.03775
|
Cesar Ag\'on
|
Cesar A. Agon and Howard J. Schnitzer
|
Holographic Mutual Information at small separations
|
13 pages, 1 figure, some references added
| null | null |
BRX-TH-6291
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The holographic mutual information for the small separation of two circles
and two strips in 2+1 dimensional space-time is considered based on the known
exact minimal surfaces spanning the boundaries on AdS4. The results suggest a
universality for the leading term in the short-distance expansion of
holographic mutual information. A conjecture for a similar result for d > 2 is
also presented, as well as comments about the analogous expansion in conformal
field theory.
|
[
{
"created": "Thu, 15 Jan 2015 18:55:42 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Feb 2015 19:48:24 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Aug 2016 22:10:57 GMT",
"version": "v3"
}
] |
2016-08-23
|
[
[
"Agon",
"Cesar A.",
""
],
[
"Schnitzer",
"Howard J.",
""
]
] |
The holographic mutual information for the small separation of two circles and two strips in 2+1 dimensional space-time is considered based on the known exact minimal surfaces spanning the boundaries on AdS4. The results suggest a universality for the leading term in the short-distance expansion of holographic mutual information. A conjecture for a similar result for d > 2 is also presented, as well as comments about the analogous expansion in conformal field theory.
|
hep-ph/0603214
|
David London
|
Maxime Imbeault, Alakabha Datta and and David London
|
Hadronic B Decays: A General Approach
|
33 pages, plain latex, 10 figures (included)
|
Int.J.Mod.Phys.A22:2057-2092,2007
|
10.1142/S0217751X07036397
|
UdeM-GPP-TH-06-145
|
hep-ph
| null |
In this paper, we propose a general approach for describing hadronic B
decays. Using this method, all amplitudes for such decays can be expressed in
terms of contractions, though the matrix elements are not evaluated. Many years
ago, Buras and Silvestrini proposed a similar approach. However, our technique
goes beyond theirs in several ways. First, we include recent theoretical and
experimental developments which indicate which contractions are negligible, and
which are expected to be smaller than others. Second, we show that all B-decay
diagrams can be simply expressed in terms of contractions. This constitutes a
formal proof that the diagrammatic method is rigourous. Third, we show that one
reproduces the relations between tree and electroweak-penguin diagrams
described by Neubert and Rosner, and by Gronau, Pirjol and Yan. Fourth,
although the previous results hold to all orders in alpha_s, we show that it is
also possible to work order-by-order in this approach. In this way it is
possible to make a connection with the matrix-element evaluation methods of QCD
factorization (QCDfac) and perturbative QCD (pQCD). Finally, using the
contractions approach, we re-evaluate the question of whether there is a ``B ->
pi K puzzle.'' At O(alpha_s^0), we find that the diagram ratio |C'/T| is about
0.17, a factor of 10 too small to explain all the B -> pi K data. Both QCDfac
and pQCD find that, at O(\alpha_s^1), the value of |C'/T'| may be raised to
only about 2-3 times its lowest-order value. We therefore conclude that,
assuming the effect is not a statistical fluctuation, it is likely that the
value of |C'/T'| is similar to its O(\alpha_s^0) result, and that there really
is a B -> pi K puzzle.
|
[
{
"created": "Fri, 24 Mar 2006 22:25:29 GMT",
"version": "v1"
}
] |
2012-08-27
|
[
[
"Imbeault",
"Maxime",
""
],
[
"Datta",
"Alakabha",
""
],
[
"London",
"and David",
""
]
] |
In this paper, we propose a general approach for describing hadronic B decays. Using this method, all amplitudes for such decays can be expressed in terms of contractions, though the matrix elements are not evaluated. Many years ago, Buras and Silvestrini proposed a similar approach. However, our technique goes beyond theirs in several ways. First, we include recent theoretical and experimental developments which indicate which contractions are negligible, and which are expected to be smaller than others. Second, we show that all B-decay diagrams can be simply expressed in terms of contractions. This constitutes a formal proof that the diagrammatic method is rigourous. Third, we show that one reproduces the relations between tree and electroweak-penguin diagrams described by Neubert and Rosner, and by Gronau, Pirjol and Yan. Fourth, although the previous results hold to all orders in alpha_s, we show that it is also possible to work order-by-order in this approach. In this way it is possible to make a connection with the matrix-element evaluation methods of QCD factorization (QCDfac) and perturbative QCD (pQCD). Finally, using the contractions approach, we re-evaluate the question of whether there is a ``B -> pi K puzzle.'' At O(alpha_s^0), we find that the diagram ratio |C'/T| is about 0.17, a factor of 10 too small to explain all the B -> pi K data. Both QCDfac and pQCD find that, at O(\alpha_s^1), the value of |C'/T'| may be raised to only about 2-3 times its lowest-order value. We therefore conclude that, assuming the effect is not a statistical fluctuation, it is likely that the value of |C'/T'| is similar to its O(\alpha_s^0) result, and that there really is a B -> pi K puzzle.
|
2011.02547
|
Richard Ruiz
|
Benjamin Fuks, Jonas Neundorf, Krisztian Peters, Richard Ruiz,
Matthias Saimpert
|
Majorana Neutrinos in Same-Sign $W^\pm W^\pm$ Scattering at the LHC:
Breaking the TeV Barrier
|
Journal version: results unchanged, only minor revisions w.r.t. v1.
31 pages (including three appendices), nine figures (23 png and pdf files),
eight tables
|
Phys. Rev. D 103, 055005 (2021)
|
10.1103/PhysRevD.103.055005
|
CP3-20-50, DESY 20-186, MCNet-20-24, VBSCAN-PUB-11-20,
IFJPAN-IV-2021-2
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit the sensitivity to non-resonant, heavy Majorana neutrinos $N$ in
same-sign $W^\pm W^\pm$ scattering at the $\sqrt{s}=13$ TeV LHC and its
high-luminosity upgrade. As a benchmark scenario, we work in the context of the
Phenomenological Type I Seesaw model, relying on a simulation up to
next-to-leading order in QCD with parton shower matching. After extensively
studying the phenomenology of the $pp\to\mu^\pm\mu^\pm j j$ process at the
amplitude and differential levels, we design a simple collider analysis with
remarkable signal-background separation power. At 95\% confidence level we find
that the squared muon-heavy neutrino mixing element $\vert V_{\mu N} \vert^{2}$
can be probed down to about $0.06-0.3 ~ (0.03-0.1)$ for $m_N = 1-10~{\rm TeV}$
with $\mathcal{L}=300$ fb$^{-1}~(3$ ab$^{-1})$. For heavier masses of $m_N =
20~{\rm TeV}$, we report sensitivity for $\vert V_{\mu N} \vert^{2}\gtrsim
0.5~(0.3)$. The $W^\pm W^\pm$ scattering channel can greatly extend the mass
range covered by current LHC searches for heavy Majorana neutrinos and
particularly adds invaluable sensitivity above a few hundred GeV. We comment on
areas where the analysis can be improved as well as on the applicability to
other tests of neutrino mass models.
|
[
{
"created": "Wed, 4 Nov 2020 21:25:40 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Mar 2021 08:29:39 GMT",
"version": "v2"
}
] |
2021-03-11
|
[
[
"Fuks",
"Benjamin",
""
],
[
"Neundorf",
"Jonas",
""
],
[
"Peters",
"Krisztian",
""
],
[
"Ruiz",
"Richard",
""
],
[
"Saimpert",
"Matthias",
""
]
] |
We revisit the sensitivity to non-resonant, heavy Majorana neutrinos $N$ in same-sign $W^\pm W^\pm$ scattering at the $\sqrt{s}=13$ TeV LHC and its high-luminosity upgrade. As a benchmark scenario, we work in the context of the Phenomenological Type I Seesaw model, relying on a simulation up to next-to-leading order in QCD with parton shower matching. After extensively studying the phenomenology of the $pp\to\mu^\pm\mu^\pm j j$ process at the amplitude and differential levels, we design a simple collider analysis with remarkable signal-background separation power. At 95\% confidence level we find that the squared muon-heavy neutrino mixing element $\vert V_{\mu N} \vert^{2}$ can be probed down to about $0.06-0.3 ~ (0.03-0.1)$ for $m_N = 1-10~{\rm TeV}$ with $\mathcal{L}=300$ fb$^{-1}~(3$ ab$^{-1})$. For heavier masses of $m_N = 20~{\rm TeV}$, we report sensitivity for $\vert V_{\mu N} \vert^{2}\gtrsim 0.5~(0.3)$. The $W^\pm W^\pm$ scattering channel can greatly extend the mass range covered by current LHC searches for heavy Majorana neutrinos and particularly adds invaluable sensitivity above a few hundred GeV. We comment on areas where the analysis can be improved as well as on the applicability to other tests of neutrino mass models.
|
1301.6794
|
Marco Astorino
|
Marco Astorino
|
Embedding hairy black holes in a magnetic universe
|
17 pages, V2: final version, to appear in Phys. Rev. D
|
Phys. Rev. D 87, 084029 (2013)
|
10.1103/PhysRevD.87.084029
|
CECS-PHY-13/01
|
gr-qc hep-th nlin.SI
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
Ernst's solution generating technique is adapted to Einstein-Maxwell theory
conformally (and minimally) coupled to a scalar field. This integrable system
enjoys a SU(2,1) symmetry which enables one to move, by Kinnersley
transformations, though the axisymmetric and stationary solution space,
building an infinite tower of physically inequivalent solutions. As a specific
application, metrics associated to scalar hairy black holes, such as the ones
discovered by Bocharova, Bronnikov, Melnikov and Bekenstein, are embedded in
the external magnetic field of the Melvin universe.
|
[
{
"created": "Mon, 28 Jan 2013 22:11:51 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Mar 2013 16:58:05 GMT",
"version": "v2"
}
] |
2013-04-24
|
[
[
"Astorino",
"Marco",
""
]
] |
Ernst's solution generating technique is adapted to Einstein-Maxwell theory conformally (and minimally) coupled to a scalar field. This integrable system enjoys a SU(2,1) symmetry which enables one to move, by Kinnersley transformations, though the axisymmetric and stationary solution space, building an infinite tower of physically inequivalent solutions. As a specific application, metrics associated to scalar hairy black holes, such as the ones discovered by Bocharova, Bronnikov, Melnikov and Bekenstein, are embedded in the external magnetic field of the Melvin universe.
|
gr-qc/0101026
|
Jozef Sima
|
Miroslav Sukenik and Jozef Sima
|
Energy and Momentum in Expansive Nondecelerative Universe
|
8 pages, LaTeX
| null | null |
SS-01-01
|
gr-qc
| null |
Incorporation of the Vaidya metric in the model of Expansive Nondecelerative
Universe allows to precisely localize gravitational energy for weak fields and
obtain the components of the Einstein energy-momentum pseudotensor for strong
gravitational fields. The components are identical to those calculated by
Virbhadra.
|
[
{
"created": "Mon, 8 Jan 2001 11:22:41 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Sukenik",
"Miroslav",
""
],
[
"Sima",
"Jozef",
""
]
] |
Incorporation of the Vaidya metric in the model of Expansive Nondecelerative Universe allows to precisely localize gravitational energy for weak fields and obtain the components of the Einstein energy-momentum pseudotensor for strong gravitational fields. The components are identical to those calculated by Virbhadra.
|
hep-ph/0112350
|
Milind Vamav Diwan
|
Milind V. Diwan, Hong Ma, T. L. Trueman
|
Muon Decay Asymmetries from $K^0_L \to \pi^0 \mu^+ \mu^-$ Decays
|
6 pages, 4 figures, To be Published in Physical Review D
|
Phys.Rev. D65 (2002) 054020
|
10.1103/PhysRevD.65.054020
|
BNL-68881
|
hep-ph
| null |
We have examined the decay $K^0_L \to \pi^0 \mu^+ \mu^-$ in which the
branching ratio, the muon energy asymmetry and the muon decay asymmetry could
be measured. In particular, we find that within the Standard Model the
longitudinal polarization ($P_L$) of the muon is proportional to the direct CP
violating amplitude. On the other hand the energy asymmetry and the
out-of-plane polarization ($P_N$) depend on both indirect and direct CP
violating amplitudes. Although the branching ratio is small and difficult to
measure because of background, the asymmetries could be large $\cal{O}$(1) in
the Standard Model. A combined analysis of the energy asymmetry, $P_L$ and
$P_N$ could be used to separate indirect CPV, direct CPV, and CP conserving
contributions to the decay.
|
[
{
"created": "Fri, 28 Dec 2001 16:46:22 GMT",
"version": "v1"
}
] |
2009-11-07
|
[
[
"Diwan",
"Milind V.",
""
],
[
"Ma",
"Hong",
""
],
[
"Trueman",
"T. L.",
""
]
] |
We have examined the decay $K^0_L \to \pi^0 \mu^+ \mu^-$ in which the branching ratio, the muon energy asymmetry and the muon decay asymmetry could be measured. In particular, we find that within the Standard Model the longitudinal polarization ($P_L$) of the muon is proportional to the direct CP violating amplitude. On the other hand the energy asymmetry and the out-of-plane polarization ($P_N$) depend on both indirect and direct CP violating amplitudes. Although the branching ratio is small and difficult to measure because of background, the asymmetries could be large $\cal{O}$(1) in the Standard Model. A combined analysis of the energy asymmetry, $P_L$ and $P_N$ could be used to separate indirect CPV, direct CPV, and CP conserving contributions to the decay.
|
1007.0338
|
Dirk Kreimer
|
Spencer Bloch and Dirk Kreimer
|
Feynman amplitudes and Landau singularities for 1-loop graphs
|
31p
| null | null |
IHES M/10/20
|
hep-th math-ph math.AG math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use mixed Hodge structures to investigate Feynman amplitudes as functions
of external momenta and masses.
|
[
{
"created": "Fri, 2 Jul 2010 11:12:47 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jul 2010 18:01:48 GMT",
"version": "v2"
}
] |
2010-07-27
|
[
[
"Bloch",
"Spencer",
""
],
[
"Kreimer",
"Dirk",
""
]
] |
We use mixed Hodge structures to investigate Feynman amplitudes as functions of external momenta and masses.
|
hep-th/0109133
|
Cai Rong-gen
|
Rong-Gen Cai
|
Gauss-Bonnet Black Holes in AdS Spaces
|
Revtex, 17 pages with 9 eps figures, v2: section II removed and
references added, the version to appear in PRD
|
Phys.Rev.D65:084014,2002
|
10.1103/PhysRevD.65.084014
| null |
hep-th gr-qc
| null |
We study thermodynamic properties and phase structures of topological black
holes in Einstein theory with a Gauss-Bonnet term and a negative cosmological
constant. The event horizon of these topological black holes can be a
hypersurface with positive, zero or negative constant curvature. When the
horizon is a zero curvature hypersurface, the thermodynamic properties of black
holes are completely the same as those of black holes without the Gauss-Bonnet
term, although the two black hole solutions are quite different. When the
horizon is a negative constant curvature hypersurface, the thermodynamic
properties of the Gauss-Bonnet black holes are qualitatively similar to those
of black holes without the Gauss-Bonnet term. When the event horizon is a
hypersurface with positive constant curvature, we find that the thermodynamic
properties and phase structures of black holes drastically depend on the
spacetime dimension $d$ and the coefficient of the Gauss-Bonnet term: when
$d\ge 6$, the properties of black hole are also qualitatively similar to the
case without the Gauss-Bonnet term, but when $d=5$, a new phase of locally
stable small black hole occurs under a critical value of the Gauss-Bonnet
coefficient, and beyond the critical value, the black holes are always
thermodynamically stable. However, the locally stable small black hole is not
globally preferred, instead a thermal anti-de Sitter space is globally
preferred. We find that there is a minimal horizon radius, below which the
Hawking-Page phase transition will not occur since for these black holes the
thermal anti de Sitter space is always globally preferred.
|
[
{
"created": "Tue, 18 Sep 2001 08:43:03 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jan 2002 03:57:23 GMT",
"version": "v2"
}
] |
2011-05-05
|
[
[
"Cai",
"Rong-Gen",
""
]
] |
We study thermodynamic properties and phase structures of topological black holes in Einstein theory with a Gauss-Bonnet term and a negative cosmological constant. The event horizon of these topological black holes can be a hypersurface with positive, zero or negative constant curvature. When the horizon is a zero curvature hypersurface, the thermodynamic properties of black holes are completely the same as those of black holes without the Gauss-Bonnet term, although the two black hole solutions are quite different. When the horizon is a negative constant curvature hypersurface, the thermodynamic properties of the Gauss-Bonnet black holes are qualitatively similar to those of black holes without the Gauss-Bonnet term. When the event horizon is a hypersurface with positive constant curvature, we find that the thermodynamic properties and phase structures of black holes drastically depend on the spacetime dimension $d$ and the coefficient of the Gauss-Bonnet term: when $d\ge 6$, the properties of black hole are also qualitatively similar to the case without the Gauss-Bonnet term, but when $d=5$, a new phase of locally stable small black hole occurs under a critical value of the Gauss-Bonnet coefficient, and beyond the critical value, the black holes are always thermodynamically stable. However, the locally stable small black hole is not globally preferred, instead a thermal anti-de Sitter space is globally preferred. We find that there is a minimal horizon radius, below which the Hawking-Page phase transition will not occur since for these black holes the thermal anti de Sitter space is always globally preferred.
|
2310.04131
|
Ilya Lvovich Shapiro
|
Ilya L. Shapiro
|
Antisymmetric Tensor Field and Cheshire Cat Smile of the Local Conformal
Symmetry
|
In v2 discussions were extended and added new references, especially
to the previous works about conformal operators acting on antisymmetric
tensor fields. Version to be submitted for publication. 20 pages, no figures
| null | null | null |
hep-th gr-qc
|
http://creativecommons.org/licenses/by/4.0/
|
The conformal version of the antisymmetric second-order tensor field in four
spacetime dimensions does not have gauge invariance extensively discussed in
the literature for more than half a century. Our first observation is that,
when coupled to fermions, only the conformal version provides renormalizability
of the theory at the one-loop level. General considerations are supported by
the derivation of one-loop divergences in the fermionic sector, indicating good
chances for asymptotic freedom. The arguments concerning one-loop
renormalizability remain valid in the presence of self-interactions and the
masses for both fermion and antisymmetric tensor fields. In the flat spacetime
limit, regardless of the conformal symmetry has gone, there is an expectation
to meet renormalizability in all loop orders.
|
[
{
"created": "Fri, 6 Oct 2023 10:00:58 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Oct 2023 23:50:37 GMT",
"version": "v2"
}
] |
2023-10-24
|
[
[
"Shapiro",
"Ilya L.",
""
]
] |
The conformal version of the antisymmetric second-order tensor field in four spacetime dimensions does not have gauge invariance extensively discussed in the literature for more than half a century. Our first observation is that, when coupled to fermions, only the conformal version provides renormalizability of the theory at the one-loop level. General considerations are supported by the derivation of one-loop divergences in the fermionic sector, indicating good chances for asymptotic freedom. The arguments concerning one-loop renormalizability remain valid in the presence of self-interactions and the masses for both fermion and antisymmetric tensor fields. In the flat spacetime limit, regardless of the conformal symmetry has gone, there is an expectation to meet renormalizability in all loop orders.
|
hep-ph/0206247
|
Hanqing Zheng
|
Zhiguang Xiao and Hanqing Zheng
|
Further remarks on $\pi\pi$ scattering dispersion relations
|
replace with revised version to appear in Chinese Physics Letters.
Numerical calculation improved. $M_\sigma\simeq 483 {\rm
MeV}$,$\Gamma_\sigma\simeq 705 {\rm MeV}$
|
CHIN. PHYS. LETT. 20 (2003)342
|
10.1088/0256-307X/20/3/308
| null |
hep-ph
| null |
The naive use of higher order perturbation theory leads the left--hand cut
integrals in $\pi\pi$ dispersion relations~\cite{hjy,Xiao01} divergent. This
problem is discussed and solved. Also we point out that the Adler zero
condition imposes three constraints on the dispersion relations. The $\sigma $
pole position is determined using the improved method, $M_\sigma= 483\pm 13
{\rm MeV}$,$\Gamma_\sigma=
705 \pm 50{\rm MeV}$. The scattering length parameter is found to be in
excellent agreement with the experimental result.
|
[
{
"created": "Tue, 25 Jun 2002 06:20:14 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jan 2003 07:30:26 GMT",
"version": "v2"
}
] |
2009-11-07
|
[
[
"Xiao",
"Zhiguang",
""
],
[
"Zheng",
"Hanqing",
""
]
] |
The naive use of higher order perturbation theory leads the left--hand cut integrals in $\pi\pi$ dispersion relations~\cite{hjy,Xiao01} divergent. This problem is discussed and solved. Also we point out that the Adler zero condition imposes three constraints on the dispersion relations. The $\sigma $ pole position is determined using the improved method, $M_\sigma= 483\pm 13 {\rm MeV}$,$\Gamma_\sigma= 705 \pm 50{\rm MeV}$. The scattering length parameter is found to be in excellent agreement with the experimental result.
|
0708.0433
|
Karol Kozlowski Kajetan
|
K. K. Kozlowski
|
On the emptiness formation probability of the open XXZ spin-$\tf{1}{2}$
chain
|
18 pages
|
J.Stat.Mech.0802:P02006,2008
|
10.1088/1742-5468/2008/02/P02006
| null |
hep-th
| null |
This paper is devoted to the study of the emptiness formation probability
$\tau\pa{m}$ of the open XXZ chain. We derive a closed form for $\tau\pa{m}$ at
$\Delta=\tf{1}{2}$ when the boundary field vanishes. Moreover we obtain its
leading asymptotics for an arbitrary boundary field at the free fermion point.
Finally, we compute the first term of the asymptotics of $\ln\pa{\tau\pa{m}}$
in the whole massless regime $-1<\Delta<1$.
|
[
{
"created": "Thu, 2 Aug 2007 22:51:16 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Kozlowski",
"K. K.",
""
]
] |
This paper is devoted to the study of the emptiness formation probability $\tau\pa{m}$ of the open XXZ chain. We derive a closed form for $\tau\pa{m}$ at $\Delta=\tf{1}{2}$ when the boundary field vanishes. Moreover we obtain its leading asymptotics for an arbitrary boundary field at the free fermion point. Finally, we compute the first term of the asymptotics of $\ln\pa{\tau\pa{m}}$ in the whole massless regime $-1<\Delta<1$.
|
hep-th/0006011
|
Valentin Khoze
|
N. Michael Davies, Timothy J. Hollowood and Valentin V. Khoze
|
Monopoles, affine algebras and the gluino condensate
|
minor changes, 23 pages, no figures
|
J.Math.Phys.44:3640-3656,2003
|
10.1063/1.1586477
| null |
hep-th hep-ph
| null |
We examine the low-energy dynamics of four-dimensional supersymmetric gauge
theories and calculate the values of the gluino condensate for all simple gauge
groups. By initially compactifying the theory on a cylinder we are able to
perform calculations in a controlled weakly-coupled way for small radius. The
dominant contributions to the path integral on the cylinder arise from magnetic
monopoles which play the role of instanton constituents. We find that the
semi-classically generated superpotential of the theory is the affine Toda
potential for an associated twisted affine algebra. We determine the
supersymmetric vacua and calculate the values of the gluino condensate. The
number of supersymmetric vacua is equal to c_2, the dual Coxeter number, and in
each vacuum the monopoles carry a fraction 1/c_2 of topological charge. As the
results are independent of the radius of the circle, they are also valid in the
strong coupling regime where the theory becomes decompactified. In this way we
obtain values for the gluino condensate which for the classical gauge groups
agree with previously known ``weak coupling instanton'' expressions (but not
with the ``strong coupling instanton'' calculations). This detailed agreement
provides further evidence in favour of the recently advocated resolution of the
the gluino condensate puzzle. We also make explicit predictions for the gluino
condensate for the exceptional groups.
|
[
{
"created": "Thu, 1 Jun 2000 21:48:19 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jun 2000 16:07:31 GMT",
"version": "v2"
}
] |
2010-11-19
|
[
[
"Davies",
"N. Michael",
""
],
[
"Hollowood",
"Timothy J.",
""
],
[
"Khoze",
"Valentin V.",
""
]
] |
We examine the low-energy dynamics of four-dimensional supersymmetric gauge theories and calculate the values of the gluino condensate for all simple gauge groups. By initially compactifying the theory on a cylinder we are able to perform calculations in a controlled weakly-coupled way for small radius. The dominant contributions to the path integral on the cylinder arise from magnetic monopoles which play the role of instanton constituents. We find that the semi-classically generated superpotential of the theory is the affine Toda potential for an associated twisted affine algebra. We determine the supersymmetric vacua and calculate the values of the gluino condensate. The number of supersymmetric vacua is equal to c_2, the dual Coxeter number, and in each vacuum the monopoles carry a fraction 1/c_2 of topological charge. As the results are independent of the radius of the circle, they are also valid in the strong coupling regime where the theory becomes decompactified. In this way we obtain values for the gluino condensate which for the classical gauge groups agree with previously known ``weak coupling instanton'' expressions (but not with the ``strong coupling instanton'' calculations). This detailed agreement provides further evidence in favour of the recently advocated resolution of the the gluino condensate puzzle. We also make explicit predictions for the gluino condensate for the exceptional groups.
|
hep-th/0005008
|
Hiroaki Kanno
|
Tohru Eguchi and Hiroaki Kanno
|
Five-Dimensional Gauge Theories and Local Mirror Symmetry
|
18 pages, Latex, minor changes, a version to appear in Nucl.Phys.B
|
Nucl.Phys.B586:331-345,2000
|
10.1016/S0550-3213(00)00375-8
|
UT-882
|
hep-th
| null |
We study the dynamics of 5-dimensional gauge theory on $M_4\times S^1$ by
compactifying type II/M theory on degenerate Calabi-Yau manifolds. We use the
local mirror symmetry and shall show that the prepotential of the 5-dimensional
SU(2) gauge theory without matter is given exactly by that of the type II
string theory compactified on the local ${\bf F}_2$, i.e. Hirzebruch surface
${\bf F}_2$ lying inside a non-compact Calabi-Yau manifold. It is shown that
our result reproduces the Seiberg-Witten theory at the 4-dimensional limit
$R\to 0$ ($R$ denotes the radius of $S^1$) and also the result of the
uncompactified 5-dimensional theory at $R\to \infty$. We also discuss SU(2)
gauge theory with $1\le N_f\le 4$ matter in vector representations and show
that they are described by the geometry of the local ${\bf F}_2$ blown up at
$N_f$ points.
|
[
{
"created": "Mon, 1 May 2000 07:05:19 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jun 2000 04:05:07 GMT",
"version": "v2"
}
] |
2010-11-19
|
[
[
"Eguchi",
"Tohru",
""
],
[
"Kanno",
"Hiroaki",
""
]
] |
We study the dynamics of 5-dimensional gauge theory on $M_4\times S^1$ by compactifying type II/M theory on degenerate Calabi-Yau manifolds. We use the local mirror symmetry and shall show that the prepotential of the 5-dimensional SU(2) gauge theory without matter is given exactly by that of the type II string theory compactified on the local ${\bf F}_2$, i.e. Hirzebruch surface ${\bf F}_2$ lying inside a non-compact Calabi-Yau manifold. It is shown that our result reproduces the Seiberg-Witten theory at the 4-dimensional limit $R\to 0$ ($R$ denotes the radius of $S^1$) and also the result of the uncompactified 5-dimensional theory at $R\to \infty$. We also discuss SU(2) gauge theory with $1\le N_f\le 4$ matter in vector representations and show that they are described by the geometry of the local ${\bf F}_2$ blown up at $N_f$ points.
|
1806.02702
|
Taejin Lee
|
Taejin Lee
|
Four-Graviton Scattering and String Path Integral in the Proper-time
gauge
|
9 pages, 1 figure, new references and comments added
| null | null | null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We evaluate the four-closed-string scattering amplitude, using the Polyakov
string path integral in the proper-time gauge. By identifying the Fock space
representation of the four-closed-string-vertex, we obtain a field theoretic
expression of the closed string scattering amplitudes. In the zero-slope limit,
the four-closed-string scattering amplitude reduces to the
four-graviton-scattering amplitude of Einstein's gravity. However, at a finite
slope, the four-graviton scattering amplitude in the proper-time gauge differs
not only from that of Einstein gravity, but also significantly differs from the
conventional one obtained by using the vertex operator technique in string
theory. This discrepancy is mainly due to the presence of closed string tachyon
poles in the four-graviton-scattering amplitude, which are missing in previous
works. Because the tachyon poles in the scattering amplitude considerably alter
the short distance behavior of gravitational interaction, they may be important
in understanding problems associated with the perturbative theory of quantum
gravity and the dark matter within the framework of string theory.
|
[
{
"created": "Thu, 7 Jun 2018 14:27:45 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jun 2019 11:13:54 GMT",
"version": "v2"
}
] |
2019-06-18
|
[
[
"Lee",
"Taejin",
""
]
] |
We evaluate the four-closed-string scattering amplitude, using the Polyakov string path integral in the proper-time gauge. By identifying the Fock space representation of the four-closed-string-vertex, we obtain a field theoretic expression of the closed string scattering amplitudes. In the zero-slope limit, the four-closed-string scattering amplitude reduces to the four-graviton-scattering amplitude of Einstein's gravity. However, at a finite slope, the four-graviton scattering amplitude in the proper-time gauge differs not only from that of Einstein gravity, but also significantly differs from the conventional one obtained by using the vertex operator technique in string theory. This discrepancy is mainly due to the presence of closed string tachyon poles in the four-graviton-scattering amplitude, which are missing in previous works. Because the tachyon poles in the scattering amplitude considerably alter the short distance behavior of gravitational interaction, they may be important in understanding problems associated with the perturbative theory of quantum gravity and the dark matter within the framework of string theory.
|
0805.2688
|
Leonid Verozub V
|
Leonid Verozub
|
Gravitation equations and space-time relativity
|
Latex, 6 pages, 1 figure
| null | null | null |
gr-qc
|
http://creativecommons.org/licenses/by/3.0/
|
In contrast to electrodynamics, Einstein's gravitation equations are not
invariant with respect to a wide class of the mapping of field variables which
leave equations of motion of test particles in a given coordinate system
invariant. It seems obvious enough that just these mappings should play a role
of gauge transformations of the variables in differential equations of
gravitational field. We consider here in short a gauge-invariant bimetric
generalisation of the Einstein equations which does not contradict availabel
observation data. Physical interpretation of the bimetricity based on
relativity of space-time with respect to used reference frame, following
conceptually from old Poincar\'{e} fundamental ideas, is proposed..
|
[
{
"created": "Sat, 17 May 2008 17:01:07 GMT",
"version": "v1"
}
] |
2008-05-20
|
[
[
"Verozub",
"Leonid",
""
]
] |
In contrast to electrodynamics, Einstein's gravitation equations are not invariant with respect to a wide class of the mapping of field variables which leave equations of motion of test particles in a given coordinate system invariant. It seems obvious enough that just these mappings should play a role of gauge transformations of the variables in differential equations of gravitational field. We consider here in short a gauge-invariant bimetric generalisation of the Einstein equations which does not contradict availabel observation data. Physical interpretation of the bimetricity based on relativity of space-time with respect to used reference frame, following conceptually from old Poincar\'{e} fundamental ideas, is proposed..
|
1701.00245
|
Poul Olesen
|
Poul Olesen
|
Non-Abelian bootstrap of primordial magnetism
|
6 pages. Magnetic energy formula for the flat expanding universe
added. Misprint corrected. Some clarifying remarks on energy minimization
added
| null | null | null |
hep-th astro-ph.HE hep-ph math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We point out that a primordial magnetic field can be generated in the
electroweak phase transition by a non-Abelian bootstrap, where the field is
generated by currents of W's, which in turn are extracted from the vacuum by
the magnetic field. This magnetic field is produced as a vortex condensate at
the electroweak phase transition. It becomes stringy as a consequence of the
dynamical evolution due to magnetohydrodynamics.
|
[
{
"created": "Sun, 1 Jan 2017 13:53:40 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jan 2017 14:16:58 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Jan 2017 14:49:06 GMT",
"version": "v3"
}
] |
2017-01-27
|
[
[
"Olesen",
"Poul",
""
]
] |
We point out that a primordial magnetic field can be generated in the electroweak phase transition by a non-Abelian bootstrap, where the field is generated by currents of W's, which in turn are extracted from the vacuum by the magnetic field. This magnetic field is produced as a vortex condensate at the electroweak phase transition. It becomes stringy as a consequence of the dynamical evolution due to magnetohydrodynamics.
|
0809.0546
|
Hamid Reza Sepangi
|
Malihe Heydari-Fard and Hamid R. Sepangi
|
Role of Chaplygin gas as geometrical dark energy in anisotropic brane
gravity
|
12 pages, 4 figures
|
Phys.Rev.D78:064007,2008
|
10.1103/PhysRevD.78.064007
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider an anisotropic brane-world model with Bianchi type I and V
geometry, without mirror symmetry or any form of junction conditions. The
generalized Chaplygin gas, which interpolates between a high density
relativistic era and a non-relativistic matter phase, is a popular candidate
for the present accelerated expansion of the universe. Considering the
generalized Chaplygin gas as a geometrical dark energy, we obtain the general
solutions in an exact parametric form for both Bianchi type I and V
space-times. Finally, we study the behavior of the observationally important
parameters such as the shear, anisotropic and deceleration parameter in this
model.
|
[
{
"created": "Wed, 3 Sep 2008 04:57:39 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Heydari-Fard",
"Malihe",
""
],
[
"Sepangi",
"Hamid R.",
""
]
] |
We consider an anisotropic brane-world model with Bianchi type I and V geometry, without mirror symmetry or any form of junction conditions. The generalized Chaplygin gas, which interpolates between a high density relativistic era and a non-relativistic matter phase, is a popular candidate for the present accelerated expansion of the universe. Considering the generalized Chaplygin gas as a geometrical dark energy, we obtain the general solutions in an exact parametric form for both Bianchi type I and V space-times. Finally, we study the behavior of the observationally important parameters such as the shear, anisotropic and deceleration parameter in this model.
|
1105.0713
|
Roger-Jos\'e Hern\'andez-Pinto
|
R. J. Hern\'andez-Pinto and A. P\'erez-Lorenzana
|
Unification and mass spectrum in the minimal $B-L$ model
|
10 pages, 10 figures
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Gauging $B-L$ symmetry provides a simple realization of the seesaw mechanism
in a naturally anomaly free extension to the MSSM gauge group, $SU(3)_c\times
SU(2)_L\times U(1)_Y \times U(1)_{B-L}$. However, as we discuss in here, it
turns out that the simplest $B-L$ extension of the MSSM may change some of the
conceptions about the path for gauge unification as well as to affect the
predicted spectrum of the supersymmetric particles at low energy. For instance,
the coupling $g_{B-L}$ ended up to be smallest of all of them and the lightest
gaugino is the one related to $B-L$. RGE also help to understand the
spontaneous breaking of the $U(1)_{B-L}$ and the vacuum expectation value of
the sneutrino at low energies, which occurs in this type of models.
|
[
{
"created": "Wed, 4 May 2011 00:58:58 GMT",
"version": "v1"
},
{
"created": "Wed, 18 May 2011 06:35:39 GMT",
"version": "v2"
}
] |
2011-05-19
|
[
[
"Hernández-Pinto",
"R. J.",
""
],
[
"Pérez-Lorenzana",
"A.",
""
]
] |
Gauging $B-L$ symmetry provides a simple realization of the seesaw mechanism in a naturally anomaly free extension to the MSSM gauge group, $SU(3)_c\times SU(2)_L\times U(1)_Y \times U(1)_{B-L}$. However, as we discuss in here, it turns out that the simplest $B-L$ extension of the MSSM may change some of the conceptions about the path for gauge unification as well as to affect the predicted spectrum of the supersymmetric particles at low energy. For instance, the coupling $g_{B-L}$ ended up to be smallest of all of them and the lightest gaugino is the one related to $B-L$. RGE also help to understand the spontaneous breaking of the $U(1)_{B-L}$ and the vacuum expectation value of the sneutrino at low energies, which occurs in this type of models.
|
gr-qc/0108070
|
Koji Uryu
|
John L. Friedman, Koji Uryu and Masaru Shibata
|
Thermodynamics of binary black holes and neutron stars
|
26 pages, revised version, modified appendix A, to appear in PRD
|
Phys.Rev.D65:064035,2002; Erratum-ibid.D70:129904,2004
|
10.1103/PhysRevD.65.064035 10.1103/PhysRevD.70.129904
| null |
gr-qc astro-ph
| null |
We consider compact binary systems, modeled in general relativity as vacuum
or perfect-fluid spacetimes with a helical Killing vector k^\alpha,
heuristically, the generator of time-translations in a corotating frame.
Systems that are stationary in this sense are not asymptotically flat, but have
asymptotic behavior corresponding to equal amounts of ingoing and outgoing
radiation. For black-hole binaries, a rigidity theorem implies that the Killing
vector lies along the horizon's generators, and from this one can deduce the
zeroth law (constant surface gravity of the horizon). Remarkably, although the
mass and angular momentum of such a system are not defined, there is an exact
first law, relating the change in the asymptotic Noether charge to the changes
in the vorticity, baryon mass, and entropy of the fluid, and in the area of
black holes.
Binary systems with M\Omega small have an approximate asymptopia in which one
can write the first law in terms of the asymptotic mass and angular momentum.
Asymptotic flatness is precise in two classes of solutions used to model binary
systems: spacetimes satisfying the post-Newtonian equations, and solutions to a
modified set of field equations that have a spatially conformally flat metric.
(The spatial conformal flatness formalism with helical symmetry, however, is
consistent with maximal slicing only if replaces the extrinsic curvature in the
field equations by an artificially tracefree expression in terms of the shift
vector.) For these spacetimes, nearby equilibria whose stars have the same
vorticity obey the relation \delta M = \Omega \delta J, from which one can
obtain a turning point criterion that governs the stability of orbits.
|
[
{
"created": "Tue, 28 Aug 2001 23:05:38 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Dec 2001 21:01:08 GMT",
"version": "v2"
}
] |
2014-11-17
|
[
[
"Friedman",
"John L.",
""
],
[
"Uryu",
"Koji",
""
],
[
"Shibata",
"Masaru",
""
]
] |
We consider compact binary systems, modeled in general relativity as vacuum or perfect-fluid spacetimes with a helical Killing vector k^\alpha, heuristically, the generator of time-translations in a corotating frame. Systems that are stationary in this sense are not asymptotically flat, but have asymptotic behavior corresponding to equal amounts of ingoing and outgoing radiation. For black-hole binaries, a rigidity theorem implies that the Killing vector lies along the horizon's generators, and from this one can deduce the zeroth law (constant surface gravity of the horizon). Remarkably, although the mass and angular momentum of such a system are not defined, there is an exact first law, relating the change in the asymptotic Noether charge to the changes in the vorticity, baryon mass, and entropy of the fluid, and in the area of black holes. Binary systems with M\Omega small have an approximate asymptopia in which one can write the first law in terms of the asymptotic mass and angular momentum. Asymptotic flatness is precise in two classes of solutions used to model binary systems: spacetimes satisfying the post-Newtonian equations, and solutions to a modified set of field equations that have a spatially conformally flat metric. (The spatial conformal flatness formalism with helical symmetry, however, is consistent with maximal slicing only if replaces the extrinsic curvature in the field equations by an artificially tracefree expression in terms of the shift vector.) For these spacetimes, nearby equilibria whose stars have the same vorticity obey the relation \delta M = \Omega \delta J, from which one can obtain a turning point criterion that governs the stability of orbits.
|
hep-th/0309118
|
Bogdan Kulik
|
Z. Guralnik and B. Kulik
|
Properties of Chiral Wilson Loops
|
15 pages, two pictures, some references added
|
JHEP 0401 (2004) 065
|
10.1088/1126-6708/2004/01/065
| null |
hep-th
| null |
We study a class of Wilson Loops in N =4, D=4 Yang-Mills theory belonging to
the chiral ring of a N=2, d=1 subalgebra. We show that the expectation value of
these loops is independent of their shape. Using properties of the chiral ring,
we also show that the expectation value is identically 1. We find the same
result for chiral loops in maximally supersymmetric Yang-Mills theory in three,
five and six dimensions. In seven dimensions, a generalized Konishi anomaly
gives an equation for chiral loops which closely resembles the loop equations
of the three dimensional Chern-Simons theory.
|
[
{
"created": "Thu, 11 Sep 2003 11:57:36 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Sep 2003 12:09:33 GMT",
"version": "v2"
}
] |
2009-11-10
|
[
[
"Guralnik",
"Z.",
""
],
[
"Kulik",
"B.",
""
]
] |
We study a class of Wilson Loops in N =4, D=4 Yang-Mills theory belonging to the chiral ring of a N=2, d=1 subalgebra. We show that the expectation value of these loops is independent of their shape. Using properties of the chiral ring, we also show that the expectation value is identically 1. We find the same result for chiral loops in maximally supersymmetric Yang-Mills theory in three, five and six dimensions. In seven dimensions, a generalized Konishi anomaly gives an equation for chiral loops which closely resembles the loop equations of the three dimensional Chern-Simons theory.
|
0707.4513
|
Simone Speziale
|
Bianca Dittrich, Laurent Freidel and Simone Speziale
|
Linearized dynamics from the 4-simplex Regge action
|
16 (+9 Appendix) pages, 1 figure
|
Phys.Rev.D76:104020,2007
|
10.1103/PhysRevD.76.104020
|
pi-qg-48
|
gr-qc hep-lat
| null |
We study the relation between the hessian matrix of the riemannian Reggae
action on a 4-simplex and linearized quantum gravity. We give an explicit
formula for the hessian as a function of the geometry, and show that it has a
single zero mode. We then use a 3d lattice model to show that (i) the zero mode
is a remnant of the continuum diffeomorphism invariance, and (ii) we recover
the complete free graviton propagator in the continuum limit. The results help
clarify the structure of the boundary state needed in the recent calculations
of the graviton propagator in loop quantum gravity, and in particular its role
in fixing the gauge.
|
[
{
"created": "Tue, 31 Jul 2007 00:28:40 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Dittrich",
"Bianca",
""
],
[
"Freidel",
"Laurent",
""
],
[
"Speziale",
"Simone",
""
]
] |
We study the relation between the hessian matrix of the riemannian Reggae action on a 4-simplex and linearized quantum gravity. We give an explicit formula for the hessian as a function of the geometry, and show that it has a single zero mode. We then use a 3d lattice model to show that (i) the zero mode is a remnant of the continuum diffeomorphism invariance, and (ii) we recover the complete free graviton propagator in the continuum limit. The results help clarify the structure of the boundary state needed in the recent calculations of the graviton propagator in loop quantum gravity, and in particular its role in fixing the gauge.
|
hep-ph/0103156
|
Levai Peter
|
J. Zimanyi, P. Levai, T. Csorgo, T.S. Biro
|
Hyperon ratios at RHIC and the coalescence predictions at mid-rapidity
|
Talk given at 30th International Symposium on Multiparticle Dynamics
(ISMD 2000), Tihany, Lake Balaton, Hungary, 9-15 Oct 2000. 9 pages in Latex,
1 PS figure
| null | null | null |
hep-ph
| null |
Quark coalescence predictions for various multi-strange baryon to anti-baryon
ratios for central Au+Au collisions at RHIC energies are compared to
preliminary data of the STAR collaboration. The formation of Quark Matter and
the sudden recombination of its constituent quarks into hadrons is found to be
in agreement with these preliminary data. It seems that strange hadron and
antihadron production in Au+Au collisions at RHIC is similar to that in Pb+Pb
collisions at CERN SPS.
|
[
{
"created": "Wed, 14 Mar 2001 14:11:57 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Zimanyi",
"J.",
""
],
[
"Levai",
"P.",
""
],
[
"Csorgo",
"T.",
""
],
[
"Biro",
"T. S.",
""
]
] |
Quark coalescence predictions for various multi-strange baryon to anti-baryon ratios for central Au+Au collisions at RHIC energies are compared to preliminary data of the STAR collaboration. The formation of Quark Matter and the sudden recombination of its constituent quarks into hadrons is found to be in agreement with these preliminary data. It seems that strange hadron and antihadron production in Au+Au collisions at RHIC is similar to that in Pb+Pb collisions at CERN SPS.
|
0704.2243
|
Clifford M. Will
|
Thomas Mitchell and Clifford M. Will (Washington University, St.
Louis)
|
Post-Newtonian gravitational radiation and equations of motion via
direct integration of the relaxed Einstein equations. V. Evidence for the
strong equivalence principle to second post-Newtonian order
|
14 pages, submitted to Phys. Rev. D; small changes to coincide with
published version
|
Phys.Rev.D75:124025,2007
|
10.1103/PhysRevD.75.124025
| null |
gr-qc
| null |
Using post-Newtonian equations of motion for fluid bodies valid to the second
post-Newtonian order, we derive the equations of motion for binary systems with
finite-sized, non-spinning but arbitrarily shaped bodies. In particular we
study the contributions of the internal structure of the bodies (such as
self-gravity) that would diverge if the size of the bodies were to shrink to
zero. Using a set of virial relations accurate to the first post-Newtonian
order that reflect the stationarity of each body, and redefining the masses to
include 1PN and 2PN self-gravity terms, we demonstrate the complete
cancellation of a class of potentially divergent, structure-dependent terms
that scale as s^{-1} and s^{-5/2}, where s is the characteristic size of the
bodies. This is further evidence of the Strong Equivalence Principle, and
supports the use of post-Newtonian approximations to derive equations of motion
for strong-field bodies such as neutron stars and black holes. This extends
earlier work done by Kopeikin.
|
[
{
"created": "Tue, 17 Apr 2007 21:51:04 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jul 2007 13:48:45 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Mitchell",
"Thomas",
"",
"Washington University, St.\n Louis"
],
[
"Will",
"Clifford M.",
"",
"Washington University, St.\n Louis"
]
] |
Using post-Newtonian equations of motion for fluid bodies valid to the second post-Newtonian order, we derive the equations of motion for binary systems with finite-sized, non-spinning but arbitrarily shaped bodies. In particular we study the contributions of the internal structure of the bodies (such as self-gravity) that would diverge if the size of the bodies were to shrink to zero. Using a set of virial relations accurate to the first post-Newtonian order that reflect the stationarity of each body, and redefining the masses to include 1PN and 2PN self-gravity terms, we demonstrate the complete cancellation of a class of potentially divergent, structure-dependent terms that scale as s^{-1} and s^{-5/2}, where s is the characteristic size of the bodies. This is further evidence of the Strong Equivalence Principle, and supports the use of post-Newtonian approximations to derive equations of motion for strong-field bodies such as neutron stars and black holes. This extends earlier work done by Kopeikin.
|
0705.1842
|
Victor Goncalves
|
F. Carvalho, F.O. Duraes, V.P. Goncalves, F.S. Navarra
|
Gluon saturation and the Froissart bound: a simple approach
|
6 pages, 5 figures. Includes additional figures, discussion and
references
|
Mod. Phys. Lett. A 23 (2008) 2847
|
10.1142/S0217732308028417
| null |
hep-ph
| null |
At very high energies we expect that the hadronic cross sections satisfy the
Froissart bound, which is a well-established property of the strong
interactions. In this energy regime we also expect the formation of the Color
Glass Condensate, characterized by gluon saturation and a typical momentum
scale: the saturation scale $Q_s$. In this paper we show that if a saturation
window exists between the nonperturbative and perturbative regimes of Quantum
Chromodynamics (QCD), the total cross sections satisfy the Froissart bound.
Furthermore, we show that our approach allows us to describe the high energy
experimental data on $pp/p\bar{p}$ total cross sections.
|
[
{
"created": "Sun, 13 May 2007 17:50:10 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Oct 2007 22:56:55 GMT",
"version": "v2"
}
] |
2014-07-18
|
[
[
"Carvalho",
"F.",
""
],
[
"Duraes",
"F. O.",
""
],
[
"Goncalves",
"V. P.",
""
],
[
"Navarra",
"F. S.",
""
]
] |
At very high energies we expect that the hadronic cross sections satisfy the Froissart bound, which is a well-established property of the strong interactions. In this energy regime we also expect the formation of the Color Glass Condensate, characterized by gluon saturation and a typical momentum scale: the saturation scale $Q_s$. In this paper we show that if a saturation window exists between the nonperturbative and perturbative regimes of Quantum Chromodynamics (QCD), the total cross sections satisfy the Froissart bound. Furthermore, we show that our approach allows us to describe the high energy experimental data on $pp/p\bar{p}$ total cross sections.
|
2211.07259
|
Mohammed Boukidi
|
Rachid Benbrik (1), Mohammed Boukidi (1), Stefano Moretti (2) (3) ((1)
Polydisciplinary Faculty, Laboratory of Fundamental and Applied Physics, Cadi
Ayyad University, Sidi Bouzid, Safi, Morocco, (2) School of Physics and
Astronomy, University of Southampton, United Kingdom, (3) Department of
Physics and Astronomy, Uppsala University, Uppsala, Sweden)
|
Probing Charged Higgs Bosons in the 2-Higgs Doublet Model Type-II with
Vector-Like Quarks
|
29 pages, 13 figures. Text revised, new figures and references added,
version accepted for publication in Physical Review D
| null |
10.1103/PhysRevD.109.055016
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We study the phenomenology of charged Higgs bosons ($H^\pm$) and Vector-Like
Quarks (VLQs), denoted as $T$, the latter possessing a charge identical to the
top quark one, within the framework of the Two Higgs Doublet Model Type-II
(2HDM-II). Upon examining two scenarios, one featuring a singlet $(T)$
(2HDM-II+$(T)$) and another a doublet $(TB)$ (2HDM-II+$(TB)$), we discover that
the presence of VLQs has a significant effect on the (pseudo)scalar sector of
the 2HDM-II. In particular, this leads to a reduction in the strict constraint
on the mass of the charged Higgs boson, which is imposed by $B$-physics
observables, specifically $B\to X_s\gamma$. {The observed reduction stems from
modifications in the charged Higgs couplings to the Standard Model (SM) top and
bottom quarks}. Notably, the degree of this reduction varies distinctly between
the singlet 2HDM+$(T)$ and doublet 2HDM+$(TB)$ scenarios. Additionally, our
investigation extends to constraints imposed by the oblique parameters $S$ and
$T$ on the VLQ mixing angles. Furthermore, to facilitate efficient exploration
of the '2HDM-II+VLQ' parameter space, we present results on pair production of
VLQs $T$ ($pp\to T\bar T$), followed by $T\to H^\pm b$ and $H^\pm \to tb$
decays, yielding a distinctive $2t4b$ final state. This investigation thus
provides valuable insights guiding the search for extended Higgs and quark
sectors at the Large Hadron Collider (LHC) at CERN.
|
[
{
"created": "Mon, 14 Nov 2022 10:42:27 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Feb 2024 18:02:21 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Mar 2024 15:26:14 GMT",
"version": "v3"
}
] |
2024-03-13
|
[
[
"Benbrik",
"Rachid",
""
],
[
"Boukidi",
"Mohammed",
""
],
[
"Moretti",
"Stefano",
""
]
] |
We study the phenomenology of charged Higgs bosons ($H^\pm$) and Vector-Like Quarks (VLQs), denoted as $T$, the latter possessing a charge identical to the top quark one, within the framework of the Two Higgs Doublet Model Type-II (2HDM-II). Upon examining two scenarios, one featuring a singlet $(T)$ (2HDM-II+$(T)$) and another a doublet $(TB)$ (2HDM-II+$(TB)$), we discover that the presence of VLQs has a significant effect on the (pseudo)scalar sector of the 2HDM-II. In particular, this leads to a reduction in the strict constraint on the mass of the charged Higgs boson, which is imposed by $B$-physics observables, specifically $B\to X_s\gamma$. {The observed reduction stems from modifications in the charged Higgs couplings to the Standard Model (SM) top and bottom quarks}. Notably, the degree of this reduction varies distinctly between the singlet 2HDM+$(T)$ and doublet 2HDM+$(TB)$ scenarios. Additionally, our investigation extends to constraints imposed by the oblique parameters $S$ and $T$ on the VLQ mixing angles. Furthermore, to facilitate efficient exploration of the '2HDM-II+VLQ' parameter space, we present results on pair production of VLQs $T$ ($pp\to T\bar T$), followed by $T\to H^\pm b$ and $H^\pm \to tb$ decays, yielding a distinctive $2t4b$ final state. This investigation thus provides valuable insights guiding the search for extended Higgs and quark sectors at the Large Hadron Collider (LHC) at CERN.
|
1912.09515
|
Charles Rabideau
|
Marine De Clerck, Charles Rabideau, Niklas Tanger
|
Caustics bounding entanglement wedges
|
32 pages, 8 figures. Typos fixed and minor clarifications added
| null |
10.1007/JHEP06(2020)166
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the caustics on the boundaries of entanglement wedges in the context
of holography in asymptotically AdS$_3$ spacetimes. These entanglement wedges
play an important role in our understanding of the emergence of bulk locality.
A procedure was proposed by Sanches and Weinberg [arXiv:1703.07780] for
identifying boundary operators which are local in the bulk, which also applies
to certain regions that lie beyond the reach of HRT surfaces by taking
advantage of the lightsheets which bound entanglement wedges. We identify the
caustics which terminate these lightsheets in conical deficit and BTZ black
hole spacetimes and find that in some examples these caustics lead to a sharp
corner in the entanglement wedge. The unexpected shape of these entanglement
wedges leads, in those cases, to a breakdown of this procedure. Many of the
properties of the rich variety of caustics possible in higher dimensions
remains to be explored which, as this work demonstrates, could lead to more
unexpected features in the shapes of entanglement wedges.
|
[
{
"created": "Thu, 19 Dec 2019 19:42:39 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2020 14:46:05 GMT",
"version": "v2"
}
] |
2020-07-15
|
[
[
"De Clerck",
"Marine",
""
],
[
"Rabideau",
"Charles",
""
],
[
"Tanger",
"Niklas",
""
]
] |
We study the caustics on the boundaries of entanglement wedges in the context of holography in asymptotically AdS$_3$ spacetimes. These entanglement wedges play an important role in our understanding of the emergence of bulk locality. A procedure was proposed by Sanches and Weinberg [arXiv:1703.07780] for identifying boundary operators which are local in the bulk, which also applies to certain regions that lie beyond the reach of HRT surfaces by taking advantage of the lightsheets which bound entanglement wedges. We identify the caustics which terminate these lightsheets in conical deficit and BTZ black hole spacetimes and find that in some examples these caustics lead to a sharp corner in the entanglement wedge. The unexpected shape of these entanglement wedges leads, in those cases, to a breakdown of this procedure. Many of the properties of the rich variety of caustics possible in higher dimensions remains to be explored which, as this work demonstrates, could lead to more unexpected features in the shapes of entanglement wedges.
|
2205.05837
|
Peter Tsimiklis
|
Florian Girelli, Matteo Laudonio, Adrian Tanasa, Panagiotis Tsimiklis
|
Group field theory on 2-groups
| null | null | null | null |
hep-th
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Group field theories are quantum field theories built on groups. They can be
seen as a tool to generate topological state-sums or quantum gravity models.
For four dimensional manifolds, different arguments have pointed towards
2-groups (such as crossed modules) as the relevant symmetry structure to probe
four dimensional topological features. Here, we introduce a group field theory
built on crossed modules which generate a four dimensional topological model,
as we prove that the Feynman diagram amplitudes can be related by Pachner
moves. This model is presumably the dual version of the Yetter-Mackaay model.
|
[
{
"created": "Thu, 12 May 2022 02:09:48 GMT",
"version": "v1"
}
] |
2022-05-13
|
[
[
"Girelli",
"Florian",
""
],
[
"Laudonio",
"Matteo",
""
],
[
"Tanasa",
"Adrian",
""
],
[
"Tsimiklis",
"Panagiotis",
""
]
] |
Group field theories are quantum field theories built on groups. They can be seen as a tool to generate topological state-sums or quantum gravity models. For four dimensional manifolds, different arguments have pointed towards 2-groups (such as crossed modules) as the relevant symmetry structure to probe four dimensional topological features. Here, we introduce a group field theory built on crossed modules which generate a four dimensional topological model, as we prove that the Feynman diagram amplitudes can be related by Pachner moves. This model is presumably the dual version of the Yetter-Mackaay model.
|
1109.0737
|
Michael Zhalov B
|
V. Rebyakova (SPbSTU), M. Strikman (PSU), M. Zhalov (PNPI)
|
Coherent rho and J/psi photoproduction in ultraperipheral processes with
electromagnetic dissociation of heavy ions at RHIC and LHC
|
16 pages, 7 figures
| null |
10.1016/j.physletb.2012.03.041
| null |
hep-ph hep-ex nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present predictions for the J/psi and rho meson production in the heavy
ion ultraperipheral collisions (UPC) for the current energy 2.76 TeV at the
LHC. Both total cross sections and cross sections with the neutron emission
from one or both nuclei are presented. We also analyse the RHIC rho meson
photoproduction data and emphasize importance of these data to test the current
model for nucleus break up in UPC.
|
[
{
"created": "Sun, 4 Sep 2011 18:17:38 GMT",
"version": "v1"
}
] |
2015-05-30
|
[
[
"Rebyakova",
"V.",
"",
"SPbSTU"
],
[
"Strikman",
"M.",
"",
"PSU"
],
[
"Zhalov",
"M.",
"",
"PNPI"
]
] |
We present predictions for the J/psi and rho meson production in the heavy ion ultraperipheral collisions (UPC) for the current energy 2.76 TeV at the LHC. Both total cross sections and cross sections with the neutron emission from one or both nuclei are presented. We also analyse the RHIC rho meson photoproduction data and emphasize importance of these data to test the current model for nucleus break up in UPC.
|
hep-ph/0005111
|
Fredrick Olness
|
Vigdor L. Teplitz, Rabindra N. Mohapatra, Fred Olness, Ryszard
Stroynowski
|
SIMP (Strongly Interacting Massive Particle) Search
|
Latex. 7 pages, 1 eps figure. Proceedings to the 4th UCLA Symposium
on Dark Matter DM2000, Marina del Rey, CA, USA, Feb. 23-25, 2000
| null | null |
SMU-HEP-00-09
|
hep-ph
| null |
We consider laboratory experiments that can detect stable, neutral strongly
interacting massive particles (SIMPs). We explore the SIMP annihilation cross
section from its minimum value (restricted by cosmological bounds) to the barn
range, and vary the mass values from a GeV to a TeV. We also consider the
prospects and problems of detecting such particles at the Tevatron.
|
[
{
"created": "Thu, 11 May 2000 21:17:21 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Teplitz",
"Vigdor L.",
""
],
[
"Mohapatra",
"Rabindra N.",
""
],
[
"Olness",
"Fred",
""
],
[
"Stroynowski",
"Ryszard",
""
]
] |
We consider laboratory experiments that can detect stable, neutral strongly interacting massive particles (SIMPs). We explore the SIMP annihilation cross section from its minimum value (restricted by cosmological bounds) to the barn range, and vary the mass values from a GeV to a TeV. We also consider the prospects and problems of detecting such particles at the Tevatron.
|
hep-ph/0101262
|
Margarete Muhlleitner
|
M.M. Muhlleitner
|
Testing Higgs Self-Couplings at High-Energy Linear Colliders
|
Contributed to 5th International Linear Collider Workshop (LCWS
2000), Fermilab, Batavia, Illinois, 24-28 Oct 2000; 4 pages
| null |
10.1063/1.1394319
|
PM/01--03
|
hep-ph
| null |
In order to verify the Higgs mechanism experimentally, the Higgs
self-couplings have to be probed. These couplings allow the reconstruction of
the characteristic Higgs potential responsible for the electroweak symmetry
breaking. The couplings are accessible in a variety of multiple Higgs
production processes. The theoretical analysis including the most relevant
channels for the production of neutral Higgs boson pairs at high-energy and
high-luminosity $e^+e^-$ linear colliders will be presented in this note.
|
[
{
"created": "Tue, 23 Jan 2001 17:44:28 GMT",
"version": "v1"
}
] |
2009-11-07
|
[
[
"Muhlleitner",
"M. M.",
""
]
] |
In order to verify the Higgs mechanism experimentally, the Higgs self-couplings have to be probed. These couplings allow the reconstruction of the characteristic Higgs potential responsible for the electroweak symmetry breaking. The couplings are accessible in a variety of multiple Higgs production processes. The theoretical analysis including the most relevant channels for the production of neutral Higgs boson pairs at high-energy and high-luminosity $e^+e^-$ linear colliders will be presented in this note.
|
1711.02690
|
David Kutasov
|
Meseret Asrat, Amit Giveon, Nissan Itzhaki and David Kutasov
|
Holography Beyond AdS
|
16 pages; v2: reference updated
| null |
10.1016/j.nuclphysb.2018.05.005
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We continue our study of string theory in a background that interpolates
between $AdS_3$ in the infrared and a linear dilaton spacetime $R^{1,1}\times
R_\phi$ in the UV. This background corresponds via holography to a $CFT_2$
deformed by a certain irrelevant operator of dimension $(2,2)$. We show that
for two point functions of local operators in the infrared CFT, conformal
perturbation theory in this irrelevant operator has a finite radius of
convergence in momentum space, and one can use it to flow up the
renormalization group. The spectral density develops an imaginary part above a
certain critical value of the spectral parameter; this appears to be related to
the non-locality of the theory. In position space, conformal perturbation
theory has a vanishing radius of convergence; the leading non-perturbative
effect is an imaginary part of the two point function.
|
[
{
"created": "Tue, 7 Nov 2017 19:14:44 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Nov 2017 21:52:04 GMT",
"version": "v2"
}
] |
2018-07-04
|
[
[
"Asrat",
"Meseret",
""
],
[
"Giveon",
"Amit",
""
],
[
"Itzhaki",
"Nissan",
""
],
[
"Kutasov",
"David",
""
]
] |
We continue our study of string theory in a background that interpolates between $AdS_3$ in the infrared and a linear dilaton spacetime $R^{1,1}\times R_\phi$ in the UV. This background corresponds via holography to a $CFT_2$ deformed by a certain irrelevant operator of dimension $(2,2)$. We show that for two point functions of local operators in the infrared CFT, conformal perturbation theory in this irrelevant operator has a finite radius of convergence in momentum space, and one can use it to flow up the renormalization group. The spectral density develops an imaginary part above a certain critical value of the spectral parameter; this appears to be related to the non-locality of the theory. In position space, conformal perturbation theory has a vanishing radius of convergence; the leading non-perturbative effect is an imaginary part of the two point function.
|
1010.2647
|
Scientific Information Service Cern
|
D. Semikoz (APC)
|
High-energy astroparticle physics
|
29 pages, Lectures given at the 5th CERN-Latin-American School of
High-Energy Physics, Recinto Quirama, Colombia, 15 - 28 Mar 2009
|
CERN Yellow Report CERN-2010-001, pp. 363-393
| null | null |
hep-ph astro-ph.HE
|
http://creativecommons.org/licenses/by/3.0/
|
In these three lectures I discuss the present status of high-energy
astroparticle physics including Ultra-High-Energy Cosmic Rays (UHECR),
high-energy gamma rays, and neutrinos. The first lecture is devoted to
ultra-high-energy cosmic rays. After a brief introduction to UHECR I discuss
the acceleration of charged particles to highest energies in the astrophysical
objects, their propagation in the intergalactic space, recent observational
results by the Auger and HiRes experiments, anisotropies of UHECR arrival
directions, and secondary gamma rays produced by UHECR. In the second lecture I
review recent results on TeV gamma rays. After a short introduction to
detection techniques, I discuss recent exciting results of the H.E.S.S., MAGIC,
and Milagro experiments on the point-like and diffuse sources of TeV gamma
rays. A special section is devoted to the detection of extragalactic magnetic
fields with TeV gamma-ray measurements. Finally, in the third lecture I discuss
Ultra-High-Energy (UHE) neutrinos. I review three different UHE neutrino
detection techniques and show the present status of searches for diffuse
neutrino flux and point sources of neutrinos.
|
[
{
"created": "Wed, 13 Oct 2010 12:37:01 GMT",
"version": "v1"
}
] |
2010-10-14
|
[
[
"Semikoz",
"D.",
"",
"APC"
]
] |
In these three lectures I discuss the present status of high-energy astroparticle physics including Ultra-High-Energy Cosmic Rays (UHECR), high-energy gamma rays, and neutrinos. The first lecture is devoted to ultra-high-energy cosmic rays. After a brief introduction to UHECR I discuss the acceleration of charged particles to highest energies in the astrophysical objects, their propagation in the intergalactic space, recent observational results by the Auger and HiRes experiments, anisotropies of UHECR arrival directions, and secondary gamma rays produced by UHECR. In the second lecture I review recent results on TeV gamma rays. After a short introduction to detection techniques, I discuss recent exciting results of the H.E.S.S., MAGIC, and Milagro experiments on the point-like and diffuse sources of TeV gamma rays. A special section is devoted to the detection of extragalactic magnetic fields with TeV gamma-ray measurements. Finally, in the third lecture I discuss Ultra-High-Energy (UHE) neutrinos. I review three different UHE neutrino detection techniques and show the present status of searches for diffuse neutrino flux and point sources of neutrinos.
|
hep-ph/0011239
|
Vladimir Ouvarov
|
V. Uvarov (Institute for High Energy Physics, Protvino, Russia)
|
Vector-to-Pseudoscalar and Meson-to-Baryon Ratios in Hadronic Z Decays
at LEP
|
LaTeX with sprocl.sty; 6 pages with 2 eps-figures; minor Editor's
corrections. Talk given at the 30th International Symposium on Multiparticle
Dynamics, Tihany, Lake Balaton, Hungary, October 9-15, 2000. To be published
in the Proceedings (World Scientific, Singapore)
|
Proceedings of the 30th ISMD, Eds. T.Csorgo, S.Hegyi, W.Kittel,
World Scientific, Singapore, 2001, p. 190-195
|
10.1016/S0370-2693(00)00485-8
|
IHEP 2000-47, Protvino, Russia
|
hep-ph hep-ex
| null |
Mass dependences of the total production rates per hadronic Z decay of all
light-flavour hadrons measured so far at LEP are extrapolated to the zero mass
limit (m=0) using phenomenological laws of hadron production related to the
spin, isospin, strangeness content and mass of the particles. The
vector-to-pseudoscalar and meson-to-baryon ratios at m=0 are found to be: rho^+
/ 3 pi^+ = 1.2 +/- 0.3 and pi^+ / p = 2.9 +/- 0.3, in good agreement with the
predictions of quark combinatorics.
|
[
{
"created": "Mon, 20 Nov 2000 10:47:59 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2001 21:51:52 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Uvarov",
"V.",
"",
"Institute for High Energy Physics, Protvino, Russia"
]
] |
Mass dependences of the total production rates per hadronic Z decay of all light-flavour hadrons measured so far at LEP are extrapolated to the zero mass limit (m=0) using phenomenological laws of hadron production related to the spin, isospin, strangeness content and mass of the particles. The vector-to-pseudoscalar and meson-to-baryon ratios at m=0 are found to be: rho^+ / 3 pi^+ = 1.2 +/- 0.3 and pi^+ / p = 2.9 +/- 0.3, in good agreement with the predictions of quark combinatorics.
|
hep-ph/0206217
|
John Bahcall
|
John N. Bahcall and Eli Waxman
|
Has the GZK suppression been discovered?
|
Editorial changes, including replacing 'cutoff' by 'supression'
|
Phys.Lett.B556:1-6,2003
|
10.1016/S0370-2693(03)00105-9
| null |
hep-ph astro-ph hep-ex nucl-ex
| null |
The energy spectra of ultra high energy cosmic rays reported by the AGASA,
Fly's Eye, Haverah Park, HiRes, and Yakutsk experiments are all shown to be in
agreement with each other for energies below 10^{20} eV (after small
adjustments, within the known uncertainties, of the absolute energy scales).
The data from HiRes, Fly's Eye, and Yakutsk are consistent with the expected
flux suppression above 5\times 10^{19} eV due to interactions of cosmic rays
with the cosmic microwave background, the Greisen-Zatsepin-Kuzmin (GZK)
"supression," and are inconsistent with a smooth extrapolation of the observed
cosmic ray energy spectrum to energies > 5\times 10^{19}$ eV. AGASA data show
an excess of events above 10^{20} eV, compared to the predicted GZK suppression
and to the flux measured by the other experiments.
|
[
{
"created": "Sat, 22 Jun 2002 15:10:49 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 2002 02:46:35 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Jul 2002 16:41:56 GMT",
"version": "v3"
},
{
"created": "Mon, 28 Oct 2002 22:10:04 GMT",
"version": "v4"
},
{
"created": "Thu, 27 Feb 2003 03:42:47 GMT",
"version": "v5"
}
] |
2010-01-28
|
[
[
"Bahcall",
"John N.",
""
],
[
"Waxman",
"Eli",
""
]
] |
The energy spectra of ultra high energy cosmic rays reported by the AGASA, Fly's Eye, Haverah Park, HiRes, and Yakutsk experiments are all shown to be in agreement with each other for energies below 10^{20} eV (after small adjustments, within the known uncertainties, of the absolute energy scales). The data from HiRes, Fly's Eye, and Yakutsk are consistent with the expected flux suppression above 5\times 10^{19} eV due to interactions of cosmic rays with the cosmic microwave background, the Greisen-Zatsepin-Kuzmin (GZK) "supression," and are inconsistent with a smooth extrapolation of the observed cosmic ray energy spectrum to energies > 5\times 10^{19}$ eV. AGASA data show an excess of events above 10^{20} eV, compared to the predicted GZK suppression and to the flux measured by the other experiments.
|
gr-qc/9404043
|
Greg Cook
|
Gregory B. Cook
|
Three-dimensional initial data for the collision of two black holes II:
Quasi-circular orbits for equal-mass black holes
|
9 pages (RevTex 3.0 with 5 uuencoded figures), CRSR-1068
|
Phys.Rev.D50:5025-5032,1994
|
10.1103/PhysRevD.50.5025
| null |
gr-qc astro-ph
| null |
The construction of initial-data sets representing binary black-hole
configurations in quasi-circular orbits is studied in the context of the
conformal-imaging formalism. An effective-potential approach for locating
quasi-circular orbits is outlined for the general case of two holes of
arbitrary size and with arbitrary spins. Such orbits are explicitly determined
for the case of two equal-sized nonrotating holes, and the innermost stable
quasi-circular orbit is located. The characteristics of this innermost orbit
are compared to previous estimates for it, and the entire sequence of
quasi-circular orbits is compared to results from the post-Newtonian
approximation. Some aspects of the numerical evolution of such data sets are
explored.
|
[
{
"created": "Mon, 25 Apr 1994 16:16:33 GMT",
"version": "v1"
}
] |
2009-09-25
|
[
[
"Cook",
"Gregory B.",
""
]
] |
The construction of initial-data sets representing binary black-hole configurations in quasi-circular orbits is studied in the context of the conformal-imaging formalism. An effective-potential approach for locating quasi-circular orbits is outlined for the general case of two holes of arbitrary size and with arbitrary spins. Such orbits are explicitly determined for the case of two equal-sized nonrotating holes, and the innermost stable quasi-circular orbit is located. The characteristics of this innermost orbit are compared to previous estimates for it, and the entire sequence of quasi-circular orbits is compared to results from the post-Newtonian approximation. Some aspects of the numerical evolution of such data sets are explored.
|
0712.0350
|
Jerzy Lukierski
|
Marcin Daszkiewicz, Jerzy Lukierski and Mariusz Woronowicz
|
Quantization of kappa-deformed free fields and kappa-deformed
oscillators
|
9 pages. Talk presented at Supersymmetry and Quantum Supersymmetry
2007 (SQS'07) Conference (Dubna, 30.07-4.08.2007) and IV-th Central European
Seminar "Commutative and Noncommutative Quantum Fields" (Vienna,
30.11-2.12.2007). To be published in the proceedings of SQS'07 (2008)
| null | null | null |
hep-th
| null |
We describe the deformed E.T. quantization rules for kappa-deformed free
quantum fields, and relate these rules with the kappa-deformed algebra of field
oscillators.
|
[
{
"created": "Mon, 3 Dec 2007 17:15:55 GMT",
"version": "v1"
}
] |
2007-12-04
|
[
[
"Daszkiewicz",
"Marcin",
""
],
[
"Lukierski",
"Jerzy",
""
],
[
"Woronowicz",
"Mariusz",
""
]
] |
We describe the deformed E.T. quantization rules for kappa-deformed free quantum fields, and relate these rules with the kappa-deformed algebra of field oscillators.
|
2207.05764
|
Monica Jinwoo Kang
|
Monica Jinwoo Kang, Craig Lawrie, Ki-Hong Lee, Matteo Sacchi, and
Jaewon Song
|
Higgs, Coulomb, and Hall-Littlewood
|
49 pages + appendices + references, 20 figures, and 5 tables
|
Physical Review D 106, no.10, 106021 (2022)
|
10.1103/PhysRevD.106.106021
|
CALT-TH-2022-024; DESY-22-110
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Higgs branch of 4d $\mathcal{N}=2$ SCFTs can be analyzed via the Hilbert
series of the Higgs branch or, in special cases, by computing the
Hall-Littlewood index. For any class $\mathcal{S}$ theory corresponding to a
genus-zero Riemann surface, they are conjectured to be identical. We present
several families of counterexamples. We find that for any class $\mathcal{S}$
theory with four or more $\mathbb{Z}_2$-twisted punctures, they do not match.
We construct 3d mirrors for such theories and analyze their Coulomb branch
Hilbert series to compute the Higgs branch Hilbert series of the 4d theory. We
further construct $a=c$ theories in class $\mathcal{S}$ using the twisted
punctures, and these theories, which includes the $\hat{D}_4(SU(2n+1))$
theories, have Hall--Littlewood index different from the Hilbert series of the
Higgs branch. We conjecture that this is the case for all $a=c$ theories with
non-empty Higgs branch, including $\mathcal{N}\ge 3$ SCFTs.
|
[
{
"created": "Tue, 12 Jul 2022 18:00:01 GMT",
"version": "v1"
}
] |
2023-02-09
|
[
[
"Kang",
"Monica Jinwoo",
""
],
[
"Lawrie",
"Craig",
""
],
[
"Lee",
"Ki-Hong",
""
],
[
"Sacchi",
"Matteo",
""
],
[
"Song",
"Jaewon",
""
]
] |
The Higgs branch of 4d $\mathcal{N}=2$ SCFTs can be analyzed via the Hilbert series of the Higgs branch or, in special cases, by computing the Hall-Littlewood index. For any class $\mathcal{S}$ theory corresponding to a genus-zero Riemann surface, they are conjectured to be identical. We present several families of counterexamples. We find that for any class $\mathcal{S}$ theory with four or more $\mathbb{Z}_2$-twisted punctures, they do not match. We construct 3d mirrors for such theories and analyze their Coulomb branch Hilbert series to compute the Higgs branch Hilbert series of the 4d theory. We further construct $a=c$ theories in class $\mathcal{S}$ using the twisted punctures, and these theories, which includes the $\hat{D}_4(SU(2n+1))$ theories, have Hall--Littlewood index different from the Hilbert series of the Higgs branch. We conjecture that this is the case for all $a=c$ theories with non-empty Higgs branch, including $\mathcal{N}\ge 3$ SCFTs.
|
hep-ph/0301091
|
Rahul Basu
|
Rahul Basu (IMSc, Chennai) and K. Sridhar (TIFR, Mumbai)
|
$\eta_c$ production and dimuon enhancement in heavy ion collisions
|
LateX, 6 pages, 2 figures (eps)
|
Eur.Phys.J. C34 (2004) 367-369
|
10.1140/epjc/s2004-01727-3
|
IMSc/2002/12/43, TIFR/TH/02-36
|
hep-ph
| null |
Dilepton production in heavy ion collisions, in the Intermediate Mass Region
(IMR) has consistently shown an excess over theoretical estimates. An attempt
to understand this discrepancy between the observed dilepton pairs and the
theoretical estimate is made here through the production of the $\eta_c$ meson
and estimates obtained by NRQCD calculations. We find that $\eta_c$ production
offers a satisfactory quantitative picture for explaining the discrepancy.
|
[
{
"created": "Tue, 14 Jan 2003 05:19:24 GMT",
"version": "v1"
}
] |
2009-11-10
|
[
[
"Basu",
"Rahul",
"",
"IMSc, Chennai"
],
[
"Sridhar",
"K.",
"",
"TIFR, Mumbai"
]
] |
Dilepton production in heavy ion collisions, in the Intermediate Mass Region (IMR) has consistently shown an excess over theoretical estimates. An attempt to understand this discrepancy between the observed dilepton pairs and the theoretical estimate is made here through the production of the $\eta_c$ meson and estimates obtained by NRQCD calculations. We find that $\eta_c$ production offers a satisfactory quantitative picture for explaining the discrepancy.
|
hep-ph/0211157
|
Hiroshi Yokoya
|
Jiro Kodaira, Hiroshi Yokoya
|
Lepton Asymmetry in Polarized Drell-Yan
|
5 pages, 15 figures, talk presented at RADCOR 2002 and Loops and Legs
2002, Kloster Banz (Germany), September 8 to 13, 2002, to appear in the
Proceedings
|
Nucl.Phys.Proc.Suppl. 116 (2003) 202-206
|
10.1016/S0920-5632(03)80170-6
| null |
hep-ph
| null |
The lepton helicity distributions in the polarized Drell-Yan process at RHIC
energy are investigated. In the absence of the weak interaction, only the
measurement of lepton helicity can prove the antisymmetric part of the hadronic
tensor. Therefore it might be interesting to consider the helicity
distributions of leptons to obtain more information on the structure of nucleon
from the polarized Drell-Yan process. We estimate the QCD corrections at ${\cal
O} (\alpha_s)$ level to the hadronic tensor including both intermediate
$\gamma$ and $Z$ bosons. We report the numerical analyses on the $Z$ pole and
show that the $u (\bar{u})$ and $d (\bar{d})$ quarks give different and
characteristic contributions to the lepton helicity distributions. We also
estimate the lepton helicity asymmetry for the various proton's spin
configurations.
|
[
{
"created": "Mon, 11 Nov 2002 17:48:47 GMT",
"version": "v1"
}
] |
2009-11-07
|
[
[
"Kodaira",
"Jiro",
""
],
[
"Yokoya",
"Hiroshi",
""
]
] |
The lepton helicity distributions in the polarized Drell-Yan process at RHIC energy are investigated. In the absence of the weak interaction, only the measurement of lepton helicity can prove the antisymmetric part of the hadronic tensor. Therefore it might be interesting to consider the helicity distributions of leptons to obtain more information on the structure of nucleon from the polarized Drell-Yan process. We estimate the QCD corrections at ${\cal O} (\alpha_s)$ level to the hadronic tensor including both intermediate $\gamma$ and $Z$ bosons. We report the numerical analyses on the $Z$ pole and show that the $u (\bar{u})$ and $d (\bar{d})$ quarks give different and characteristic contributions to the lepton helicity distributions. We also estimate the lepton helicity asymmetry for the various proton's spin configurations.
|
0712.4146
|
David Tucker-Smith
|
Zoe Thomas, David Tucker-Smith, and Neal Weiner
|
Mixed Sneutrinos, Dark Matter and the LHC
| null |
Phys.Rev.D77:115015,2008
|
10.1103/PhysRevD.77.115015
| null |
hep-ph
| null |
We study the phenomenology of supersymmetric models in which gauge-singlet
scalars mix with the MSSM sneutrinos through weak-scale $A$ terms. After
reviewing the constraints on mixed-sneutrino dark matter from measurements of
$\Omega_{CDM}$ and from direct-detection experiments, we explore
mixed-sneutrino signatures relevant to the LHC. For a mixed-sneutrino LSP and a
right-handed slepton NLSP, decays of the lightest neturalino can produce
opposite-sign, same-flavor (OSSF) dileptons with an invariant-mass distribution
shifted away from the kinematic endpoint. In different parameter regions, the
charginos and neutralinos produced in cascades all decay dominantly to the
lighter sneutrinos, leading to a kinematic edge in the jet-lepton
invariant-mass distribution from the decay chain $\tilde{q} \to \chi^- q \to
\snu^* l q$, without an OSSF dilepton signature. We explore the possibility of
using mass estimation methods to distinguish this mixed-sneutrino jet-lepton
signature from an MSSM one. Finally, we consider signatures associated with
Higgs-lepton or $Z$-lepton production in cascades involving the heavier
sneutrinos.
|
[
{
"created": "Wed, 26 Dec 2007 21:34:09 GMT",
"version": "v1"
}
] |
2022-09-09
|
[
[
"Thomas",
"Zoe",
""
],
[
"Tucker-Smith",
"David",
""
],
[
"Weiner",
"Neal",
""
]
] |
We study the phenomenology of supersymmetric models in which gauge-singlet scalars mix with the MSSM sneutrinos through weak-scale $A$ terms. After reviewing the constraints on mixed-sneutrino dark matter from measurements of $\Omega_{CDM}$ and from direct-detection experiments, we explore mixed-sneutrino signatures relevant to the LHC. For a mixed-sneutrino LSP and a right-handed slepton NLSP, decays of the lightest neturalino can produce opposite-sign, same-flavor (OSSF) dileptons with an invariant-mass distribution shifted away from the kinematic endpoint. In different parameter regions, the charginos and neutralinos produced in cascades all decay dominantly to the lighter sneutrinos, leading to a kinematic edge in the jet-lepton invariant-mass distribution from the decay chain $\tilde{q} \to \chi^- q \to \snu^* l q$, without an OSSF dilepton signature. We explore the possibility of using mass estimation methods to distinguish this mixed-sneutrino jet-lepton signature from an MSSM one. Finally, we consider signatures associated with Higgs-lepton or $Z$-lepton production in cascades involving the heavier sneutrinos.
|
2309.05759
|
Daniel Kabat
|
Daniel Kabat, Marcelo Nomura
|
Induced Lorentz Violation on a Moving Braneworld
|
29 pages. v2: fixed a minor typo
| null | null | null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a braneworld scenario in which a flat 4-D brane, embedded in
$M^{3,1} \times S^1$, is moving on or spiraling around the $S^1$. Although the
induced metric on the brane is 4-D Minkowski, the would-be Lorentz symmetry of
the brane is broken globally by the compactification. As recently pointed out
this means causal bulk signals can propagate superluminally and even backwards
in time according to brane observers. Here we consider the effective action on
the brane induced by loops of bulk fields. We consider a variety of self-energy
and vertex corrections due to bulk scalars and gravitons and show that bulk
loops with non-zero winding generate UV-finite Lorentz-violating terms in the
4-D effective action. The results can be accommodated by the Standard Model
Extension, a general framework for Lorentz-violating effective field theory.
|
[
{
"created": "Mon, 11 Sep 2023 18:37:39 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Nov 2023 19:50:51 GMT",
"version": "v2"
}
] |
2023-11-17
|
[
[
"Kabat",
"Daniel",
""
],
[
"Nomura",
"Marcelo",
""
]
] |
We consider a braneworld scenario in which a flat 4-D brane, embedded in $M^{3,1} \times S^1$, is moving on or spiraling around the $S^1$. Although the induced metric on the brane is 4-D Minkowski, the would-be Lorentz symmetry of the brane is broken globally by the compactification. As recently pointed out this means causal bulk signals can propagate superluminally and even backwards in time according to brane observers. Here we consider the effective action on the brane induced by loops of bulk fields. We consider a variety of self-energy and vertex corrections due to bulk scalars and gravitons and show that bulk loops with non-zero winding generate UV-finite Lorentz-violating terms in the 4-D effective action. The results can be accommodated by the Standard Model Extension, a general framework for Lorentz-violating effective field theory.
|
2009.03774
|
Daniela Doneva
|
Daniela D. Doneva, Lucas G. Collodel, Christian J. Kr\"uger, Stoytcho
S. Yazadjiev
|
Spin-induced scalarization of Kerr black holes with a massive scalar
field
|
10 pages, 3 figures. arXiv admin note: text overlap with
arXiv:2008.07391
| null |
10.1140/epjc/s10052-020-08765-3
| null |
gr-qc astro-ph.HE hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the present paper we study the onset of the spin-induced scalarization of
a Kerr black hole in scalar-Gauss-Bonnet gravity with a massive scalar field.
Our approach is based on a (2+1) time evolution of the relevant linearized
scalar field perturbation equation. We examine the region where the Kerr black
hole becomes unstable giving rise to new scalarized rotating black holes with a
massive scalar field. With increasing of the scalar field mass, the minimum
value of the Gauss-Bonnet coupling parameter at which scalarization is
possible, increases and thus the instability region shrinks. Interestingly, the
introduction of scalar field mass does not change the critical minimal value of
the black hole angular momentum $a_{\rm crit}/M$ where the instability of the
Kerr black hole develops.
|
[
{
"created": "Mon, 7 Sep 2020 15:52:07 GMT",
"version": "v1"
}
] |
2021-02-03
|
[
[
"Doneva",
"Daniela D.",
""
],
[
"Collodel",
"Lucas G.",
""
],
[
"Krüger",
"Christian J.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] |
In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss-Bonnet gravity with a massive scalar field. Our approach is based on a (2+1) time evolution of the relevant linearized scalar field perturbation equation. We examine the region where the Kerr black hole becomes unstable giving rise to new scalarized rotating black holes with a massive scalar field. With increasing of the scalar field mass, the minimum value of the Gauss-Bonnet coupling parameter at which scalarization is possible, increases and thus the instability region shrinks. Interestingly, the introduction of scalar field mass does not change the critical minimal value of the black hole angular momentum $a_{\rm crit}/M$ where the instability of the Kerr black hole develops.
|
1911.08317
|
Maxim Dvornikov
|
Maxim Dvornikov (IZMIRAN)
|
Spin effects in neutrino gravitational scattering
|
16 pages in LaTeX2e, 20 eps figures
|
Phys. Rev. D 101, 056018 (2020)
|
10.1103/PhysRevD.101.056018
| null |
hep-ph astro-ph.HE gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study spin oscillations of neutrinos gravitationally scattered off a
nonrotating black hole (BH). We derive the transition and survival
probabilities of spin oscillations in quadratures when neutrinos interacts with
BH only. The dependence of the probabilities on the impact parameter is
analyzed. Then, we obtain the effective Schr\"{o}dinger equation for neutrino
spin oscillations in neutrino scattering off BH surrounded by background
matter. This equation is solved numerically in the case of a supermassive BH
with a realistic accretion disk. We find that the observed neutrino fluxes can
be reduced almost 20% because of spin oscillations when neutrinos experience
gravitational scattering. The neutrino interaction with an accretion disk
results in the additional asymmetry in the intensities of outgoing fluxes
depending on the neutrino trajectory.
|
[
{
"created": "Tue, 19 Nov 2019 14:49:58 GMT",
"version": "v1"
}
] |
2020-03-30
|
[
[
"Dvornikov",
"Maxim",
"",
"IZMIRAN"
]
] |
We study spin oscillations of neutrinos gravitationally scattered off a nonrotating black hole (BH). We derive the transition and survival probabilities of spin oscillations in quadratures when neutrinos interacts with BH only. The dependence of the probabilities on the impact parameter is analyzed. Then, we obtain the effective Schr\"{o}dinger equation for neutrino spin oscillations in neutrino scattering off BH surrounded by background matter. This equation is solved numerically in the case of a supermassive BH with a realistic accretion disk. We find that the observed neutrino fluxes can be reduced almost 20% because of spin oscillations when neutrinos experience gravitational scattering. The neutrino interaction with an accretion disk results in the additional asymmetry in the intensities of outgoing fluxes depending on the neutrino trajectory.
|
2205.09773
|
Luc Darm\'e
|
Luc Darm\'e
|
Atmospheric resonant production for light dark sectors
|
7 pages, 5 figures, datasets available at
https://zenodo.org/record/6561236
| null |
10.1103/PhysRevD.106.055015
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cosmic ray atmospheric showers provide an effective environment for the
production of MeV-scale dark sector particles. We show that, when available,
the resonant annihilation of positrons from the shower on atmospheric electrons
is the dominant production mechanism by more than an order of magnitude. We
provide a quantitative example based on dark photon production and update
existing constraints on a corresponding light dark matter model from kilotons
neutrino experiments and xenon-based direct detection experiments.
|
[
{
"created": "Thu, 19 May 2022 18:00:04 GMT",
"version": "v1"
}
] |
2022-10-05
|
[
[
"Darmé",
"Luc",
""
]
] |
Cosmic ray atmospheric showers provide an effective environment for the production of MeV-scale dark sector particles. We show that, when available, the resonant annihilation of positrons from the shower on atmospheric electrons is the dominant production mechanism by more than an order of magnitude. We provide a quantitative example based on dark photon production and update existing constraints on a corresponding light dark matter model from kilotons neutrino experiments and xenon-based direct detection experiments.
|
1306.4974
|
Gautam Mandal
|
Pawel Caputa, Gautam Mandal and Ritam Sinha
|
Dynamical entanglement entropy with angular momentum and U(1) charge
|
22 pages, 4 figures; (v2) many comments added for better clarity;
typos fixed; references added
| null |
10.1007/JHEP11(2013)052
|
TIFR/TH/13-16, WITS-CTP-116
|
hep-th cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider time-dependent entanglement entropy (EE) for a 1+1 dimensional
CFT in the presence of angular momentum and U(1) charge. The EE saturates,
irrespective of the initial state, to the grand canonical entropy after a time
large compared with the length of the entangling interval. We reproduce the CFT
results from an AdS dual consisting of a spinning BTZ black hole and a flat
U(1) connection. The apparent discrepancy that the holographic EE does not a
priori depend on the U(1) charge while the CFT EE does, is resolved by the
charge-dependent shift between the bulk and boundary stress tensors. We show
that for small entangling intervals, the entanglement entropy obeys the first
law of thermodynamics, as conjectured recently. The saturation of the EE in the
field theory is shown to follow from a version of quantum ergodicity; the
derivation indicates that it should hold for conformal as well as massive
theories in any number of dimensions.
|
[
{
"created": "Thu, 20 Jun 2013 19:49:23 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Aug 2013 12:26:54 GMT",
"version": "v2"
}
] |
2015-06-16
|
[
[
"Caputa",
"Pawel",
""
],
[
"Mandal",
"Gautam",
""
],
[
"Sinha",
"Ritam",
""
]
] |
We consider time-dependent entanglement entropy (EE) for a 1+1 dimensional CFT in the presence of angular momentum and U(1) charge. The EE saturates, irrespective of the initial state, to the grand canonical entropy after a time large compared with the length of the entangling interval. We reproduce the CFT results from an AdS dual consisting of a spinning BTZ black hole and a flat U(1) connection. The apparent discrepancy that the holographic EE does not a priori depend on the U(1) charge while the CFT EE does, is resolved by the charge-dependent shift between the bulk and boundary stress tensors. We show that for small entangling intervals, the entanglement entropy obeys the first law of thermodynamics, as conjectured recently. The saturation of the EE in the field theory is shown to follow from a version of quantum ergodicity; the derivation indicates that it should hold for conformal as well as massive theories in any number of dimensions.
|
1001.4857
|
Shan Gao
|
Shan Gao
|
On Di\'osi-Penrose criterion of gravity-induced quantum collapse
|
5 pages, no figures
|
Int. J. Theor.Phys., 49, 849-853, 2010
|
10.1007/s10773-010-0266-9
| null |
gr-qc quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is shown that the Di\'osi-Penrose criterion of gravity-induced quantum
collapse may be inconsistent with the discreteness of space-time, which is
generally considered as an indispensable element in a complete theory of
quantum gravity. Moreover, the analysis also suggests that the discreteness of
space-time may result in rapider collapse of the superposition of energy
eigenstates than required by the Di\'osi-Penrose criterion.
|
[
{
"created": "Wed, 27 Jan 2010 05:42:29 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Jul 2011 11:41:29 GMT",
"version": "v2"
}
] |
2011-07-19
|
[
[
"Gao",
"Shan",
""
]
] |
It is shown that the Di\'osi-Penrose criterion of gravity-induced quantum collapse may be inconsistent with the discreteness of space-time, which is generally considered as an indispensable element in a complete theory of quantum gravity. Moreover, the analysis also suggests that the discreteness of space-time may result in rapider collapse of the superposition of energy eigenstates than required by the Di\'osi-Penrose criterion.
|
hep-th/0105319
|
Kluson Josef
|
J. Kluson
|
Some Remarks About Berkovits' Superstring Field Theory
|
14 pages, Introduction part and some typos corrected, ref. added
|
JHEP 0106:045,2001
|
10.1088/1126-6708/2001/06/045
| null |
hep-th
| null |
In this short note we would like to discuss general solutions of the
Berkovits superstring field theory, in particular the string field action for
fluctuation around such a solution. We will find that fluctuations obey the
same equation of motion as the original field with the new BRST operator. Then
we will argue that the superstring field theory action for fluctuation field
has the same form as the original one.
|
[
{
"created": "Thu, 31 May 2001 17:24:20 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2001 07:32:02 GMT",
"version": "v2"
}
] |
2010-02-03
|
[
[
"Kluson",
"J.",
""
]
] |
In this short note we would like to discuss general solutions of the Berkovits superstring field theory, in particular the string field action for fluctuation around such a solution. We will find that fluctuations obey the same equation of motion as the original field with the new BRST operator. Then we will argue that the superstring field theory action for fluctuation field has the same form as the original one.
|
hep-th/0607243
|
Pietro Antonio Grassi
|
P.A. Grassi and M. Marescotti
|
Flux Vacua and Supermanifolds
|
Latex, no figures, 35 pp, misprints and minor changes
|
JHEP 0701:068,2007
|
10.1088/1126-6708/2007/01/068
|
DISTA-UPO-06, DFTT-18/2006
|
hep-th
| null |
As been recently pointed out, physically relevant models derived from string
theory require the presence of non-vanishing form fluxes besides the usual
geometrical constraints. In the case of NS-NS fluxes, the Generalized Complex
Geometry encodes these informations in a beautiful geometrical structure. On
the other hand, the R-R fluxes call for supergeometry as the underlying
mathematical framework. In this context, we analyze the possibility of
constructing interesting supermanifolds recasting the geometrical data and RR
fluxes. To characterize these supermanifolds we have been guided by the fact
topological strings on supermanifolds require the super-Ricci flatness of the
target space. This can be achieved by adding to a given bosonic manifold enough
anticommuting coordinates and new constraints on the bosonic sub-manifold. We
study these constraints at the linear and non-linear level for a pure
geometrical setting and in the presence of p-form field strengths. We find that
certain spaces admit several super-extensions and we give a parameterization in
a simple case of d bosonic coordinates and two fermionic coordinates. In
addition, we comment on the role of the RR field in the construction of the
super-metric. We give several examples based on supergroup manifolds and coset
supermanifolds.
|
[
{
"created": "Sun, 30 Jul 2006 10:26:32 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2006 11:21:35 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Apr 2008 09:54:32 GMT",
"version": "v3"
}
] |
2010-10-27
|
[
[
"Grassi",
"P. A.",
""
],
[
"Marescotti",
"M.",
""
]
] |
As been recently pointed out, physically relevant models derived from string theory require the presence of non-vanishing form fluxes besides the usual geometrical constraints. In the case of NS-NS fluxes, the Generalized Complex Geometry encodes these informations in a beautiful geometrical structure. On the other hand, the R-R fluxes call for supergeometry as the underlying mathematical framework. In this context, we analyze the possibility of constructing interesting supermanifolds recasting the geometrical data and RR fluxes. To characterize these supermanifolds we have been guided by the fact topological strings on supermanifolds require the super-Ricci flatness of the target space. This can be achieved by adding to a given bosonic manifold enough anticommuting coordinates and new constraints on the bosonic sub-manifold. We study these constraints at the linear and non-linear level for a pure geometrical setting and in the presence of p-form field strengths. We find that certain spaces admit several super-extensions and we give a parameterization in a simple case of d bosonic coordinates and two fermionic coordinates. In addition, we comment on the role of the RR field in the construction of the super-metric. We give several examples based on supergroup manifolds and coset supermanifolds.
|
1101.5597
|
V. Sreekanth
|
Jitesh R. Bhatt, Hiranmaya Mishra, V. Sreekanth
|
Cavitation and thermal dilepton production in QGP
|
10 pages, 5 figures
| null |
10.1016/j.nuclphysa.2011.11.012
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the \textit{non-ideal} effects arising due to viscosity (both bulk
and shear), equation of state ($\epsilon\neq 3P$) and cavitation on thermal
dilepton production from QGP at RHIC energies. We calculate the first order
corrections to the dilepton production rates due to shear and bulk viscosities.
Ignoring the cavitation can lead to a wrong estimation of dilepton spectra. We
show that the shear viscosity can enhance the thermal dilepton spectra whereas
the bulk viscosity can suppress it. We present the combined effect of bulk and
shear viscosities on the dilepton spectra.
|
[
{
"created": "Fri, 28 Jan 2011 18:13:02 GMT",
"version": "v1"
}
] |
2015-05-27
|
[
[
"Bhatt",
"Jitesh R.",
""
],
[
"Mishra",
"Hiranmaya",
""
],
[
"Sreekanth",
"V.",
""
]
] |
We study the \textit{non-ideal} effects arising due to viscosity (both bulk and shear), equation of state ($\epsilon\neq 3P$) and cavitation on thermal dilepton production from QGP at RHIC energies. We calculate the first order corrections to the dilepton production rates due to shear and bulk viscosities. Ignoring the cavitation can lead to a wrong estimation of dilepton spectra. We show that the shear viscosity can enhance the thermal dilepton spectra whereas the bulk viscosity can suppress it. We present the combined effect of bulk and shear viscosities on the dilepton spectra.
|
1411.1892
|
Yilei Tang
|
Yi-Lei Tang
|
One Right-handed Neutrino to Generate Complete Neutrino Mass Spectrum in
the Framework of NMSSM
|
20 pages, 7 figures
|
Nucl. Phys. B 890, 263 2015
|
10.1016/j.nuclphysb.2014.11.012
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The see-saw mechanism is usually applied to explain the lightness of
neutrinos. The traditional see-saw mechanism introduces at least two
right-handed neutrinos for the realistic neutrino spectrum. In the case of
supersymmetry, loop corrections can also contribute to neutrino masses, which
lead to the possibility to generate the neutrino spectrum by introducing just
one right-handed neutrino. To be realistic, MSSM suffers from the mu problem
and other phenomenological difficulties, so we extend NMSSM (the MSSM with a
singlet S) by introducing one single right-handed neutrino superfield (N) and
relevant phenomenology is discussed
|
[
{
"created": "Fri, 7 Nov 2014 12:05:43 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2014 07:13:46 GMT",
"version": "v2"
}
] |
2014-12-01
|
[
[
"Tang",
"Yi-Lei",
""
]
] |
The see-saw mechanism is usually applied to explain the lightness of neutrinos. The traditional see-saw mechanism introduces at least two right-handed neutrinos for the realistic neutrino spectrum. In the case of supersymmetry, loop corrections can also contribute to neutrino masses, which lead to the possibility to generate the neutrino spectrum by introducing just one right-handed neutrino. To be realistic, MSSM suffers from the mu problem and other phenomenological difficulties, so we extend NMSSM (the MSSM with a singlet S) by introducing one single right-handed neutrino superfield (N) and relevant phenomenology is discussed
|
2101.07064
|
Eric Huguet
|
E. Huguet, M. Le Delliou and M. Fontanini
|
Cartan approach to Teleparallel Equivalent to General Relativity: a
review
|
From the (web)Teleparallel Gravity Workshop COSMOGRAV 2020 Tartu june
15-19. Revtex 9 pages
|
Int. Jou. Geom. Meth. Mod. Phys, 18 supp01, 21400041 (2021)
|
10.1142/S0219887821400041
| null |
gr-qc hep-th math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In previous works, questioning the mathematical nature of the connection in
the translations gauge theory formulation of Teleparallel Equivalent to General
Relativity (TEGR) Theory led us to propose a new formulation using a Cartan
connection. In this review, we summarize the presentation of that proposal and
discuss it from a gauge theoretic perspective.
|
[
{
"created": "Mon, 18 Jan 2021 13:22:53 GMT",
"version": "v1"
}
] |
2021-10-06
|
[
[
"Huguet",
"E.",
""
],
[
"Delliou",
"M. Le",
""
],
[
"Fontanini",
"M.",
""
]
] |
In previous works, questioning the mathematical nature of the connection in the translations gauge theory formulation of Teleparallel Equivalent to General Relativity (TEGR) Theory led us to propose a new formulation using a Cartan connection. In this review, we summarize the presentation of that proposal and discuss it from a gauge theoretic perspective.
|
hep-th/0202019
|
Karasik David
|
David Karasik and Aharon Davidson
|
Brane Variation Dirac Style
|
7 pages, 1 eps figure, paper revised
|
Class.Quant.Grav. 21 (2004) 1295-1302
|
10.1088/0264-9381/21/6/001
| null |
hep-th gr-qc
| null |
Dirac's method for variations of a brane embedded in co-dimension one is
demonstrated. The variation in the location of the brane invokes a rest frame
formulation of the 'sandwiched' brane action. We first demonstrate the
necessity of this method by re-deriving Snell's law. Second, we apply the
method to a general $N$-dimensional brane embedded in co-dimension one bulk in
the presence of gravity. We re-derive the brane equations: (i) Israel junction
condition, (ii) Energy/momentum conservation on the brane, and (iii)
Geodetic-type equation for the brane.
|
[
{
"created": "Mon, 4 Feb 2002 07:26:04 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Sep 2003 15:25:18 GMT",
"version": "v2"
}
] |
2009-11-07
|
[
[
"Karasik",
"David",
""
],
[
"Davidson",
"Aharon",
""
]
] |
Dirac's method for variations of a brane embedded in co-dimension one is demonstrated. The variation in the location of the brane invokes a rest frame formulation of the 'sandwiched' brane action. We first demonstrate the necessity of this method by re-deriving Snell's law. Second, we apply the method to a general $N$-dimensional brane embedded in co-dimension one bulk in the presence of gravity. We re-derive the brane equations: (i) Israel junction condition, (ii) Energy/momentum conservation on the brane, and (iii) Geodetic-type equation for the brane.
|
1902.05105
|
Stanley Deser
|
S.Deser
|
Energy in Gravitation and Noether's Theorems
|
Dedicated to the memory of Peter Freund, friend and brilliant
colleague for over five decades. Published version
|
JPhys A 52(2019)381001
|
10.1088/1751-8121/ab1e19
|
BRX TH-6647 CALT-TH 2019-0005 CALT-TH 2019-005
|
gr-qc hep-th physics.hist-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
I exhibit the conflicting roles of Noether's two great theorems in defining
conserved quantities, especially Energy in General Relativity and its
extensions: It is the breaking of coordinate invariance through boundary
conditions that removes the barrier her second theorem otherwise poses to the
applicability of her first. There is nothing new here, except the emphasis that
General must be broken down to Special Relativity in a special, but physically
natural, way in order for the Poincare or other global groups such as (A)dS to
"re-"emerge.
|
[
{
"created": "Wed, 13 Feb 2019 20:04:41 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Apr 2019 21:49:07 GMT",
"version": "v2"
}
] |
2019-09-02
|
[
[
"Deser",
"S.",
""
]
] |
I exhibit the conflicting roles of Noether's two great theorems in defining conserved quantities, especially Energy in General Relativity and its extensions: It is the breaking of coordinate invariance through boundary conditions that removes the barrier her second theorem otherwise poses to the applicability of her first. There is nothing new here, except the emphasis that General must be broken down to Special Relativity in a special, but physically natural, way in order for the Poincare or other global groups such as (A)dS to "re-"emerge.
|
1502.00539
|
Roberto Contino
|
Aleksandr Azatov, Roberto Contino, Giuliano Panico and Minho Son
|
Effective field theory analysis of double Higgs production via gluon
fusion
|
51 pages, 21 figures. v2: estimate of expected precision on total
cross section included, various comments added, typos corrected
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We perform a detailed study of double Higgs production via gluon fusion in
the Effective Field Theory (EFT) framework where effects from new physics are
parametrized by local operators. Our analysis provides a perspective broader
than the one followed in most of the previous analyses, where this process was
merely considered as a way to extract the Higgs trilinear coupling. We focus on
the $hh \to b\bar b\gamma\gamma$ channel and perform a thorough simulation of
signal and background at the 14 TeV LHC and a future 100 TeV proton-proton
collider. We make use of invariant mass distributions to enhance the
sensitivity on the EFT coefficients and give a first assessment of the impact
of jet substructure techniques on the results. The range of validity of the EFT
description is estimated, as required to consistently exploit the high-energy
range of distributions, pointing out the potential relevance of dimension-8
operators. Our analysis contains a few important improvements over previous
studies and identifies some inaccuracies there appearing in connection with the
estimate of signal and background rates. The estimated precision on the Higgs
trilinear coupling that follows from our results is less optimistic than
previously claimed in the literature. We find that a ~30% accuracy can be
reached on the trilinear coupling at a future 100 TeV collider with 3 ab^-1.
Only an O(1) determination seems instead possible at the LHC with the same
amount of integrated luminosity.
|
[
{
"created": "Mon, 2 Feb 2015 16:32:44 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2015 08:29:58 GMT",
"version": "v2"
}
] |
2015-07-29
|
[
[
"Azatov",
"Aleksandr",
""
],
[
"Contino",
"Roberto",
""
],
[
"Panico",
"Giuliano",
""
],
[
"Son",
"Minho",
""
]
] |
We perform a detailed study of double Higgs production via gluon fusion in the Effective Field Theory (EFT) framework where effects from new physics are parametrized by local operators. Our analysis provides a perspective broader than the one followed in most of the previous analyses, where this process was merely considered as a way to extract the Higgs trilinear coupling. We focus on the $hh \to b\bar b\gamma\gamma$ channel and perform a thorough simulation of signal and background at the 14 TeV LHC and a future 100 TeV proton-proton collider. We make use of invariant mass distributions to enhance the sensitivity on the EFT coefficients and give a first assessment of the impact of jet substructure techniques on the results. The range of validity of the EFT description is estimated, as required to consistently exploit the high-energy range of distributions, pointing out the potential relevance of dimension-8 operators. Our analysis contains a few important improvements over previous studies and identifies some inaccuracies there appearing in connection with the estimate of signal and background rates. The estimated precision on the Higgs trilinear coupling that follows from our results is less optimistic than previously claimed in the literature. We find that a ~30% accuracy can be reached on the trilinear coupling at a future 100 TeV collider with 3 ab^-1. Only an O(1) determination seems instead possible at the LHC with the same amount of integrated luminosity.
|
1505.06689
|
Emmanuel Stamou
|
Gilad Perez, Yotam Soreq, Emmanuel Stamou, Kohsaku Tobioka
|
Prospects for measuring the Higgs coupling to light quarks
|
16 pages, 8 figures, journal version, updated references and minor
corrections, conclusions unchanged
|
Phys. Rev. D 93, 013001 (2016)
|
10.1103/PhysRevD.93.013001
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the prospects to probe the light-quark Yukawa couplings to the
Higgs boson. The Higgs coupling to the charm quark can be probed both via
inclusive and exclusive approaches. On the inclusive frontier, we use our
recently proposed method together with published experimental studies for the
sensitivity of the Higgs coupling to bottom quarks to find that the
high-luminosity LHC can be sensitive to modifications of the charm Yukawa of
the order of a few times its standard model (SM) value. We also present a
preliminary study of this mode for a 100 TeV hadronic machine (with similar
luminosity) and find that the bound can be further improved, possibly within
the reach of the expected signal in the SM. On the exclusive frontier, we use
the recent ATLAS search for charmonia and photon final state. This study yields
the first measurement of the background relevant to these modes. Using this
background measurement we project that at the high-luminosity LHC, unless the
analysis strategy is changed, the sensitivity of the exclusive final state to
the charm Yukawa to the charm Yukawa will be rather poor, of the order of 50
times the SM coupling. We then use a Monte-Carlo study to rescale the above
backgrounds to the h->phi gamma case and obtain a much weaker sensitivity to
the strange Yukawa, of order of 3000 times the SM value. We briefly speculate
what would be required to improve the prospects of the exclusive modes.
|
[
{
"created": "Mon, 25 May 2015 16:48:59 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Feb 2016 10:46:21 GMT",
"version": "v2"
}
] |
2016-02-23
|
[
[
"Perez",
"Gilad",
""
],
[
"Soreq",
"Yotam",
""
],
[
"Stamou",
"Emmanuel",
""
],
[
"Tobioka",
"Kohsaku",
""
]
] |
We discuss the prospects to probe the light-quark Yukawa couplings to the Higgs boson. The Higgs coupling to the charm quark can be probed both via inclusive and exclusive approaches. On the inclusive frontier, we use our recently proposed method together with published experimental studies for the sensitivity of the Higgs coupling to bottom quarks to find that the high-luminosity LHC can be sensitive to modifications of the charm Yukawa of the order of a few times its standard model (SM) value. We also present a preliminary study of this mode for a 100 TeV hadronic machine (with similar luminosity) and find that the bound can be further improved, possibly within the reach of the expected signal in the SM. On the exclusive frontier, we use the recent ATLAS search for charmonia and photon final state. This study yields the first measurement of the background relevant to these modes. Using this background measurement we project that at the high-luminosity LHC, unless the analysis strategy is changed, the sensitivity of the exclusive final state to the charm Yukawa to the charm Yukawa will be rather poor, of the order of 50 times the SM coupling. We then use a Monte-Carlo study to rescale the above backgrounds to the h->phi gamma case and obtain a much weaker sensitivity to the strange Yukawa, of order of 3000 times the SM value. We briefly speculate what would be required to improve the prospects of the exclusive modes.
|
1301.3965
|
Raymond R. Volkas
|
Raymond R. Volkas
|
Unified origin for visible and dark matter in a baryon-symmetric
universe from a first-order phase transition
|
5 pages. Invited talk at CosPA 2012 Symposium, Nov. 13-17, Taiwan.
Submitted to the proceedings. v2: added references
| null |
10.1016/j.nuclphysbps.2013.10.065
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In a baryon-symmetric universe, the baryon asymmetry observed for visible
matter is matched by an equal and opposite asymmetry for dark matter, thereby
closely connecting the number densities of both types of matter. This is a
necessary step towards the goal of explaining the mystery of why the visible
and dark matter densities are observed to be similar. In this talk, a way of
producing such a universe from bubble nucleation during a first-order phase
transition is reviewed. The process is an analog of electroweak baryogenesis.
|
[
{
"created": "Thu, 17 Jan 2013 02:13:11 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jan 2013 03:57:25 GMT",
"version": "v2"
}
] |
2015-06-12
|
[
[
"Volkas",
"Raymond R.",
""
]
] |
In a baryon-symmetric universe, the baryon asymmetry observed for visible matter is matched by an equal and opposite asymmetry for dark matter, thereby closely connecting the number densities of both types of matter. This is a necessary step towards the goal of explaining the mystery of why the visible and dark matter densities are observed to be similar. In this talk, a way of producing such a universe from bubble nucleation during a first-order phase transition is reviewed. The process is an analog of electroweak baryogenesis.
|
hep-ph/9610452
|
Arnd Brandenburg
|
Arnd Brandenburg (RWTH Aachen)
|
Spin Physics with Top Quarks at Hadron Colliders
|
3 pages, Latex, Talk presented at the 12th International Symposium on
High-Energy Spin Physics, Amsterdam, The Netherlands, September 10th-14th
1996
| null | null | null |
hep-ph
| null |
We discuss the prospects to observe effects of transverse polarization and
spin-spin correlations of top quark pairs produced at hadron colliders.
|
[
{
"created": "Wed, 23 Oct 1996 06:58:59 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Brandenburg",
"Arnd",
"",
"RWTH Aachen"
]
] |
We discuss the prospects to observe effects of transverse polarization and spin-spin correlations of top quark pairs produced at hadron colliders.
|
hep-th/0305126
|
Nelson R. F. Braga
|
Henrique Boschi-Filho and Nelson R. F. Braga
|
AdS space compactification and holographic mapping in the AdS/CFT
correspondence
|
5 pages, talk presented at "Renormalization Group and Anomalies in
Gravity and Cosmology", Ouro Preto, Brazil, March 2003
|
Nucl.Phys.Proc.Suppl.127:128-132,2004
|
10.1016/S0920-5632(03)02413-7
| null |
hep-th
| null |
Physical consistency of quantum fields in anti-de Sitter space time requires
that the space must be compactified by the inclusion of a boundary where
appropriate conditions are imposed. An interpretation for the presence of this
boundary is found taking AdS as a limiting case of the space generated by a
large number of coincident branes. The compactification of AdS leads to a
discretization of the spectrum of bulk fields. As a consequence, we find a one
to one mapping between the quantum states of scalar fields in AdS bulk and
boundary. Using this mapping as an approximation for the dual relation between
string dilaton field and scalar QCD glueballs the high energy QCD scaling is
reproduced. We also use this map to estimate the ratio of scalar glueball
masses.
|
[
{
"created": "Wed, 14 May 2003 21:15:31 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Boschi-Filho",
"Henrique",
""
],
[
"Braga",
"Nelson R. F.",
""
]
] |
Physical consistency of quantum fields in anti-de Sitter space time requires that the space must be compactified by the inclusion of a boundary where appropriate conditions are imposed. An interpretation for the presence of this boundary is found taking AdS as a limiting case of the space generated by a large number of coincident branes. The compactification of AdS leads to a discretization of the spectrum of bulk fields. As a consequence, we find a one to one mapping between the quantum states of scalar fields in AdS bulk and boundary. Using this mapping as an approximation for the dual relation between string dilaton field and scalar QCD glueballs the high energy QCD scaling is reproduced. We also use this map to estimate the ratio of scalar glueball masses.
|
1701.05660
|
Chul Kim
|
Lin Dai, Chul Kim, Adam K. Leibovich
|
Fragmentation to a jet in the large $z$ limit
|
21 pages, 6 figures; matches published version
|
Phys. Rev. D 95, 074003 (2017)
|
10.1103/PhysRevD.95.074003
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the fragmentation of a parton into a jet with small radius $R$ in
the large $z$ limit, where $z$ is the ratio of the jet energy to the mother
parton energy. In this region of phase space, large logarithms of both $R$ and
$1-z$ can appear, requiring resummation in order to have a well defined
perturbative expansion. Using soft-collinear effective theory, we study the
fragmentation function to a jet (FFJ) in this endpoint region. We derive a
factorization theorem for this object, separating collinear and collinear-soft
modes. This allows for the resummation using renormalization group evolution of
the logarithms $\ln R$ and $\ln(1-z)$ simultaneously. We show results valid to
next-to-leading logarithmic order for the global Sudakov logarithms. We also
discuss the possibility of non-global logarithms that should appear at
two-loops and give an estimate of their size.
|
[
{
"created": "Fri, 20 Jan 2017 02:50:11 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2017 02:11:31 GMT",
"version": "v2"
}
] |
2017-04-12
|
[
[
"Dai",
"Lin",
""
],
[
"Kim",
"Chul",
""
],
[
"Leibovich",
"Adam K.",
""
]
] |
We consider the fragmentation of a parton into a jet with small radius $R$ in the large $z$ limit, where $z$ is the ratio of the jet energy to the mother parton energy. In this region of phase space, large logarithms of both $R$ and $1-z$ can appear, requiring resummation in order to have a well defined perturbative expansion. Using soft-collinear effective theory, we study the fragmentation function to a jet (FFJ) in this endpoint region. We derive a factorization theorem for this object, separating collinear and collinear-soft modes. This allows for the resummation using renormalization group evolution of the logarithms $\ln R$ and $\ln(1-z)$ simultaneously. We show results valid to next-to-leading logarithmic order for the global Sudakov logarithms. We also discuss the possibility of non-global logarithms that should appear at two-loops and give an estimate of their size.
|
1806.09262
|
Leonid Perlov
|
Leonid Perlov
|
Revisiting Quantum Volume Operator
| null | null | null | null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we introduce the n-dimensional hypersurface quantum volume
operator by using the n-dimensional holonomy variation formula. Instead of
trying to construct the n-dimensional hypersurface volume operator by using the
n-1 dimensional hypersufrace volume operators, as it is usually done in 3d
case, we introduce the n-dimensional volume operator directly. We use two facts
- first, that the area of the n-dimensional hypersurface of the n+1 dimensional
manifold is the volume of the n dimensional induced metric and secondly that
the holonomy variation formula is valid for the n-dimensional hypersufrace in
the n+1 manifold with connection values in any Lie algebra.
|
[
{
"created": "Mon, 25 Jun 2018 02:58:50 GMT",
"version": "v1"
}
] |
2018-06-26
|
[
[
"Perlov",
"Leonid",
""
]
] |
In this paper we introduce the n-dimensional hypersurface quantum volume operator by using the n-dimensional holonomy variation formula. Instead of trying to construct the n-dimensional hypersurface volume operator by using the n-1 dimensional hypersufrace volume operators, as it is usually done in 3d case, we introduce the n-dimensional volume operator directly. We use two facts - first, that the area of the n-dimensional hypersurface of the n+1 dimensional manifold is the volume of the n dimensional induced metric and secondly that the holonomy variation formula is valid for the n-dimensional hypersufrace in the n+1 manifold with connection values in any Lie algebra.
|
gr-qc/0205080
|
Cuauhtemoc Campuzano Vargas
|
Alberto A. Garcia and Cuauhtemoc Campuzano
|
On Conformally Flat Stationary Axisymmetric Spacetimes
|
RevTex4, 5 pages
|
Phys.Rev.D66:124018,2002; Erratum-ibid.D68:049901,2003
|
10.1103/PhysRevD.66.124018 10.1103/PhysRevD.68.049901
| null |
gr-qc
| null |
It is shown that within conformally flat stationary axisymmetric spacetimes,
besides of the static family, there exists a new class of metrics, which is
always stationary and axisymmetric. All these spacetimes, the static and the
stationary ones, are endowed with an arbitrary function depending on the two
non--Killingian coordinates. The explicit form of this function can be
determined once the coupled matter, i.e., the energy--momentum tensor is given.
One might hope possible extensions of this result to black holes on two--branes
in four dimensions.
|
[
{
"created": "Fri, 17 May 2002 23:31:41 GMT",
"version": "v1"
}
] |
2014-11-17
|
[
[
"Garcia",
"Alberto A.",
""
],
[
"Campuzano",
"Cuauhtemoc",
""
]
] |
It is shown that within conformally flat stationary axisymmetric spacetimes, besides of the static family, there exists a new class of metrics, which is always stationary and axisymmetric. All these spacetimes, the static and the stationary ones, are endowed with an arbitrary function depending on the two non--Killingian coordinates. The explicit form of this function can be determined once the coupled matter, i.e., the energy--momentum tensor is given. One might hope possible extensions of this result to black holes on two--branes in four dimensions.
|
1910.08121
|
Er-Cheng Tsai
|
Er-Cheng Tsai
|
Ghost Loops are Indispensable in Unitary Gauge
| null | null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is conventionally taken for granted that the unitary gauge formulation of
quantum gauge field theory has the advantage of preservation unitarity because
only physical fields are involved but has the disadvantage of losing
renormalizability because of severe ultraviolet divergences due to vector meson
propagators. In this paper, we show how to handle the ultraviolet divergent
loops so that the physical amplitudes remain gauge invariant. One of the
consequences we arrive at is that ghost loops are needed to cancel the
divergences due to vector mesons and to give gauge invariant physical
amplitudes.
|
[
{
"created": "Thu, 17 Oct 2019 19:27:23 GMT",
"version": "v1"
}
] |
2019-10-21
|
[
[
"Tsai",
"Er-Cheng",
""
]
] |
It is conventionally taken for granted that the unitary gauge formulation of quantum gauge field theory has the advantage of preservation unitarity because only physical fields are involved but has the disadvantage of losing renormalizability because of severe ultraviolet divergences due to vector meson propagators. In this paper, we show how to handle the ultraviolet divergent loops so that the physical amplitudes remain gauge invariant. One of the consequences we arrive at is that ghost loops are needed to cancel the divergences due to vector mesons and to give gauge invariant physical amplitudes.
|
hep-th/9502032
| null |
M. C. Diamantini, P. Sodano, C. A. Trugenberger
|
Self Duality and Oblique Confinement in Planar Gauge Theories
|
32 pages, harvmac
|
Nucl.Phys. B448 (1995) 505-532
|
10.1016/0550-3213(95)00252-N
|
UGVA-DPT 1994/11-88 and DFUPG 98/94
|
hep-th cond-mat
| null |
We investigate the non-perturbative structure of two planar $Z_p \times Z_p$
lattice gauge models and discuss their relevance to two-dimensional condensed
matter systems and Josephson junction arrays. Both models involve two compact
U(1) gauge fields with Chern-Simons interactions, which break the symmetry down
to $Z_p \times Z_p$. By identifying the relevant topological excitations
(instantons) and their interactions we determine the phase structure of the
models. Our results match observed quantum phase transitions in Josephson
junction arrays and suggest also the possibility of {\it oblique confining
ground states} corresponding to quantum Hall regimes for either charges or
vortices.
|
[
{
"created": "Mon, 6 Feb 1995 10:06:47 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Diamantini",
"M. C.",
""
],
[
"Sodano",
"P.",
""
],
[
"Trugenberger",
"C. A.",
""
]
] |
We investigate the non-perturbative structure of two planar $Z_p \times Z_p$ lattice gauge models and discuss their relevance to two-dimensional condensed matter systems and Josephson junction arrays. Both models involve two compact U(1) gauge fields with Chern-Simons interactions, which break the symmetry down to $Z_p \times Z_p$. By identifying the relevant topological excitations (instantons) and their interactions we determine the phase structure of the models. Our results match observed quantum phase transitions in Josephson junction arrays and suggest also the possibility of {\it oblique confining ground states} corresponding to quantum Hall regimes for either charges or vortices.
|
1605.09028
|
Anton Rebhan
|
A. Rebhan
|
Scalar and tensor glueball decay rates from the Witten-Sakai-Sugimoto
model
|
5 pages, to appear in the proceedings of the 51st Rencontres de
Moriond - QCD and High Energy Interactions
| null | null | null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The holographic Witten-Sakai-Sugimoto model is an almost parameter-free
approximation to large-N QCD with chiral quarks that in a number of cases gives
surprisingly good quantitative results for light meson physics. It also allows
for predictions of the decay rates of glueballs into pseudoscalar and vector
mesons through the coupling of modes on the flavor branes to the massive
gravitational modes in the bulk. Including effects from finite quark masses
leads to an enhancement of the decay of scalar glueballs into heavier
pseudoscalars in good agreement with the decay pattern observed for the scalar
glueball candidate f0(1710). Tensor glueballs are found to have a large width
when their masses are above the 2 rho and 2 K* thresholds. With a mass as
suggested by lattice gauge theory the lowest tensor glueball appears to be too
broad to be observable, in contrast to the pseudoscalar glueball which may be a
rather narrow state.
|
[
{
"created": "Sun, 29 May 2016 16:53:56 GMT",
"version": "v1"
}
] |
2016-05-31
|
[
[
"Rebhan",
"A.",
""
]
] |
The holographic Witten-Sakai-Sugimoto model is an almost parameter-free approximation to large-N QCD with chiral quarks that in a number of cases gives surprisingly good quantitative results for light meson physics. It also allows for predictions of the decay rates of glueballs into pseudoscalar and vector mesons through the coupling of modes on the flavor branes to the massive gravitational modes in the bulk. Including effects from finite quark masses leads to an enhancement of the decay of scalar glueballs into heavier pseudoscalars in good agreement with the decay pattern observed for the scalar glueball candidate f0(1710). Tensor glueballs are found to have a large width when their masses are above the 2 rho and 2 K* thresholds. With a mass as suggested by lattice gauge theory the lowest tensor glueball appears to be too broad to be observable, in contrast to the pseudoscalar glueball which may be a rather narrow state.
|
1704.03492
|
Takeo Moroi
|
Motoi Endo, Takeo Moroi, Mihoko M. Nojiri, Yutaro Shoji
|
False Vacuum Decay in Gauge Theory
|
39 pages, 1 figure, typos corrected, reference added
| null |
10.1007/JHEP11(2017)074
|
KEK-TH-1971, UT-17-10
|
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The decay rate of a false vacuum is studied in gauge theory, paying
particular attention to its gauge invariance. Although the decay rate should
not depend on the gauge parameter $\xi$ according to the Nielsen identity, the
gauge invariance of the result of a perturbative calculation has not been
clearly shown. We give a prescription to perform a one-loop calculation of the
decay rate, with which a manifestly gauge-invariant expression of the decay
rate is obtained. We also discuss the renormalization necessary to make the
result finite, and show that the decay rate is independent of the gauge
parameter even after the renormalization.
|
[
{
"created": "Tue, 11 Apr 2017 18:44:57 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Oct 2017 10:06:28 GMT",
"version": "v2"
}
] |
2017-12-06
|
[
[
"Endo",
"Motoi",
""
],
[
"Moroi",
"Takeo",
""
],
[
"Nojiri",
"Mihoko M.",
""
],
[
"Shoji",
"Yutaro",
""
]
] |
The decay rate of a false vacuum is studied in gauge theory, paying particular attention to its gauge invariance. Although the decay rate should not depend on the gauge parameter $\xi$ according to the Nielsen identity, the gauge invariance of the result of a perturbative calculation has not been clearly shown. We give a prescription to perform a one-loop calculation of the decay rate, with which a manifestly gauge-invariant expression of the decay rate is obtained. We also discuss the renormalization necessary to make the result finite, and show that the decay rate is independent of the gauge parameter even after the renormalization.
|
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