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The Inverse Seesaw in Conformal Electro-Weak Symmetry Breaking and
Phenomenological Consequences: We study the inverse seesaw mechanism for neutrino masses and
phenomenological consequences in the context of conformal electro-weak symmetry
breaking. The main difference to the usual case is that all explicit fermion
m... | hep-ph |
Determination of Fundamental Supersymmetry Parameters from Chargino
Production at Lepii: If accessible at LEP II, chargino production is likely to be one of the few
available supersymmetric signals for many years. We consider the prospects for
the determination of fundamental supersymmetry parameters in such a scenar... | hep-ph |
Perturbative heavy quarkonium spectrum at
next-to-next-to-next-to-leading order: We compute the energy levels of some of the lower-lying heavy quarkonium
states perturbatively up to O(alpha_s^5*m) and O(alpha_s^5*m*log[alpha_s]).
Stability of the predictions depends crucially on the unknown 4-loop pole-MSbar
mass rel... | hep-ph |
Measuring the skewness dependency of Generalized Parton Distributions: Generalized Parton Distributions (GPDs) have emerged over the 1990s as a
powerful concept and tool to study nucleon structure. They provide nucleon
tomography from the correlation between transverse position and longitudinal
momentum of partons. The... | hep-ph |
Color flux-tube nature of the states $T_{cs}(2900)$ and
$T^a_{c\bar{s}}(2900)$: Inspired by the states $T_{cs0}(2900)^0$, $T_{cs1}(2900)^0$,
$T^a_{c\bar{s}0}(2900)^{0}$ and $T^a_{c\bar{s}0}(2900)^{++}$ reported by the
LHCb Collaboration, we carry out a systematical investigation on the properties
of the ground and $P... | hep-ph |
$b\to s γ$ Decay in the Two Higgs Doublet Model: QCD corrections to $b \to s \gamma$ decay in the two Higgs doublet model are
calculated from the energy scale of top quark to that of bottom. The
constraints on the two Higgs doublet model from the new experimental bounds of
$b\to s\gamma$ by CLEO and the latest top quar... | hep-ph |
Extra dimensions, orthopositronium decay, and stellar cooling: In a class of extra dimensional models with a warped metric and a single
brane the photon can be localized on the brane by gravity only. An intriguing
feature of these models is the possibility of the photon escaping into the
extra dimensions. The search fo... | hep-ph |
Effects of random matter density fluctuations on the neutrino
oscillation transition probabilities in the Earth: In this paper, we investigate the effects of random fluctuations of the Earth
matter density for long baselines on the neutrino oscillation transition
probabilities. We especially identify relevant paramet... | hep-ph |
Two-loop corrections to the Higgs trilinear coupling in BSM models with
classical scale invariance: Classical scale invariance (CSI) is an attractive concept for BSM model
building, explaining the apparent alignment of the Higgs sector and potentially
relating to the hierarchy problem. Furthermore, a particularly int... | hep-ph |
Treating the b quark distribution function with reliable uncertainties: The parton distribution function for a b quark in the B meson (called the
shape function) plays an important role in the analysis of the B -> X_s gamma
and B -> X_u l nu data, and gives one of the dominant uncertainties in the
determination of |Vub... | hep-ph |
Neutrino Oscillations in Finite Time Path Out-of-Equilibrium Thermal
Field Theory: We demonstrate that the Finite-Time-Path Field Theory is an adequate tool for
calculating neutrino oscillations. We apply this theory using a mass-mixing
Lagrangian which involves the correct Dirac spin and chirality structure and a
Po... | hep-ph |
The Rare Top Decays $t \to b W^+ Z$ and $t \to c W^+ W^-$: The large value of the top quark mass implies that the rare top decays $t
\rightarrow b W^+ Z, s W^+ Z$ and $d W^+ Z$, and $t \rightarrow c W^+ W^-$ and
$u W^+ W^-$, are kinematically allowed decays so long as $m_t \ge m_W + m_Z +
m_{d_i} \approx 171.5 GeV + m_... | hep-ph |
Gluon-Meson Duality in the Mean Field Approximation: In a gauge-fixed language gluon-meson duality can be described as the Higgs
mechanism for ``spontaneous symmetry breaking'' of color. We present a mean
field computation which suggests that this phenomenon is plausible in QCD. One
obtains realistic masses of the ligh... | hep-ph |
Facets of chiral perturbation theory: Chiral perturbation theory is the effective field theory of the Standard
Model at low energies. After a short introduction and overview, I discuss three
topics where the chiral approach leads to a deeper understanding of low-energy
hadron physics: radiative kaon decays, carbogenesi... | hep-ph |
Hidden Mass Hierarchy in QCD: We discuss implications of the recent measurements of the non-Abelian action
density associated with the monopoles condensed in the confining phase of
gluodynamics. The radius of the monopole determined in terms of the action was
found to be small numerically. As far as the condensation of... | hep-ph |
Asymmetry of Strange Sea in Nucleons: Based on the finite-temperature field theory, we evaluate the medium effects
in nucleon which can induce an asymmetry between quarks and antiquarks of the
strange sea. The short-distance effects determined by the weak interaction can
give rise to $\delta m\equiv \Delta m_s-\Delta m... | hep-ph |
Pileup and Underlying Event Mitigation with Iterative Constituent
Subtraction: The hard-scatter processes in hadronic collisions are often largely
contaminated with soft background coming from pileup in proton-proton
collisions, or underlying event in heavy-ion collisions. This paper presents a
new background subtrac... | hep-ph |
Divergences in anomalous dimension matrices of quarks at three loops:
Explanation and simple solution: Three-loop counterterms for the Standard Model (SM) revealed that the matrix
of anomalous dimensions ($\gamma$) of quarks is divergent in the $d \to 4$
limit unless a carefully chosen non-Hermitian square-root of $Z... | hep-ph |
Peak shifts due to $B^{(*)}-\bar{B}^{(*)}$ rescattering in
$Υ(5S)$ dipion transitions: We study the energy distributions of dipion transitions $\Upsilon(5S)$ to
$\Upsilon(1S,2S,3S)\pi^+\pi^-$ in the final state rescattering model. Since the
$\Upsilon(5S)$ is well above the open bottom thresholds, the dipion transitio... | hep-ph |
Quark Model, Nonperturbative Wave Functions, the QCD Sum Rules and
Instantons: The main subject of these lectures is the Nonperturbative Wave Functions. We
describe some nonperturbative methods (like QCD sum rules, dispersion
relations, duality etc) in order to study this object. We also consider some
applications of... | hep-ph |
WIMP Dark Matter in a Well-Tempered Regime: A case study on
Singlet-Doublets Fermionic WIMP: Serious searches for the weakly interacting massive particle (WIMP) have now
begun. In this context, the most important questions that need to be addressed
are: "To what extent can we constrain the WIMP models in the future?"... | hep-ph |
${\mathcal O}(α_s)$ corrections to $e^+e^-\rightarrow
J/ψ+η_{c2}(χ_{c1}^\prime)$ at $B$ factories: We investigate the ${\cal O}(\alpha_s)$ correction to $e^+e^-\to
J/\psi+\eta_{c2}$ in the NRQCD factorization approach. A detailed comparative
study between $e^+e^-\to J/\psi+\eta_{c2}$ and $e^+e^-\to
J/\psi+\chi^\prime... | hep-ph |
Baryogenesis from L-violating Higgs-doublet decay in the density-matrix
formalism: We compute in the density-matrix formalism the baryon asymmetry generated by
the decay of the Higgs doublet into a right-handed (RH) neutrino and a Standard
Model lepton. The emphasis is put on the baryon asymmetry produced by the tota... | hep-ph |
Bs to mu mu gamma from Bs to mu mu: The Bs to mu mu gamma decay offers sensitivity to a wider set of effective
operators than its non-radiative counterpart Bs to mu mu, and a set that is
interesting in the light of present-day discrepancies in flavour data. On the
other hand, the direct measurement of the Bs to mu mu g... | hep-ph |
Correlation femtoscopy of small systems: The basic principles of the correlation femtoscopy, including its
correspondence to the Hanbury Brown and Twiss intensity interferometry, are
re-examined. The main subject of the paper is an analysis of the correlation
femtoscopy when the source size is as small as the order of ... | hep-ph |
Dirac Neutrinos and Hybrid Inflation from String Theory: We consider a possible scenario for the generation of Dirac neutrino masses
motivated by Type I string theory. The smallness of the neutrino Yukawa
couplings is explained by an anisotropic compactification with one
compactification radius larger than the others. ... | hep-ph |
RGE, the naturalness problem and the understanding of the Higgs mass
term: The naturalness problem might be studied on the complex two dimensional plane
with the technique of dimensional regularization(DREG). The Renormalization
group equation(RGE) of the Higgs mass on the plane suggests the Higgs mass
approaches zer... | hep-ph |
Parton densities and structure functions at next-to-next-to-leading
order and beyond: We summarize recent results on the evolution of unpolarized parton densities
and deep-inelastic structure functions in massless perturbative QCD. Due to
last year's extension of the integer-moment calculations of the three-loop
spli... | hep-ph |
Unitarity and Fermion Mass Generatation: Some years ago Appelquist and Chanowitz considered the scattering of
fermion--anti-fermion into a pair of longitudinal gauge bosons. Their
calculation established that unitarity implies that the physics giving mass to
a quark of mass $m_f$ must be below a mass scale of $16 \pi v... | hep-ph |
Effect of finite volume on thermodynamics of quark-hadron matter: The effects of a finite system volume on thermodynamic quantities, such as
the pressure, energy density, specific heat, speed of sound, conserved charge
susceptibilities and correlations, in hot and dense strongly interacting matter
are studied within th... | hep-ph |
Twisted particles in heavy-ion collisions: The importance of production of twisted (vortex) particles in heavy-ion
collisions is analyzed. Free twisted particles can possess giant intrinsic
orbital angular momenta. Twisted particles are spatially localized and can be
rather ubiquitous in laboratories and nature. Twiste... | hep-ph |
Neutrino Masses and Absence of Flavor Changing Interactions in the 2HDM
from Gauge Principles: We propose several Two Higgs Doublet Models with the addition of an Abelian
gauge group which free the usual framework from flavor changing neutral
interactions and explain neutrino masses through the seesaw mechanism. We
d... | hep-ph |
Open-source QCD analysis of nuclear parton distribution functions at NLO
and NNLO: We present new sets of nuclear parton distribution functions (nPDFs) at
next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). Our
analyses are based on deeply inelastic scattering data with charged-lepton and
neutrino b... | hep-ph |
The Elusiveness of Infrared Critical Exponents in Landau Gauge
Yang--Mills Theories: We solve a truncated system of coupled Dyson-Schwinger equations for the
gluon and ghost propagators in SU($N_c$) Yang-Mills theories in Faddeev-Popov
quantization on a four-torus. This compact space-time manifold provides an
efficie... | hep-ph |
Self-consistent Gaussian model of nonperturbative QCD vacuum: We show that the minimal Gaussian model of nonlocal vacuum quark and
quark-gluon condensates in QCD generates the non-transversity of vector current
correlators. We suggest the improved Gaussian model of the nonperturbative QCD
vacuum, which respects QCD equ... | hep-ph |
Implementing inverse seesaw mechanism in SU(3)xSU(4)xU(1) gauge models: Generating appropriate tiny neutrino masses via inverse seesaw mechanism
within the framework of a particular SU(3)xSU(4)xU(1) gauge model is the main
outcome of this letter. It is achieved by simply adding three singlet exotic
Majorana neutrinos t... | hep-ph |
Can supercooling explain the HBT puzzle?: Possible hadronization of supercooled QGP, created in heavy ion collisions at
RHIC and SPS, is discussed within a Bjorken hydrodynamic model. Such a
hadronization is expected to be a very fast shock-like process, what, if
hadronization coincides or shortly followed by freeze ou... | hep-ph |
R-parity violating anomaly mediated supersymmetry breaking: We propose a new scenario that solves the slepton negative mass squared
problem of the minimal supersymmetric standard model with anomaly mediated
supersymmetry breaking. The solution is achieved by including three trilinear
R-parity violating operators in the... | hep-ph |
On the Hadronic light-by-light contribution to the muon $g-2$: This talk is about the hadronic light-by-light contribution to the muon
anomalous magnetic moment, mainly our old work but including some newer results
as well. It concentrates on the model calculations. Most attention is paid to
pseudo-scalar exchange and ... | hep-ph |
$A_0$ condensation, Nielsen's identity and effective potential of order
parameter: In high temperature SU(2) gluodynamics, the condensation of the zero
component gauge field potential A_0 =const and its gauge-fixing dependence are
investigated. A_0 is mutually related with Polyakov's loop <L>. The two-loop
effective ... | hep-ph |
Some results from the NA27 Data: The self-affine analysis and erraticity analysis of pseudorapidity gaps are
performed for the data of 400GeV/$c$ pp collisions. The self-affine analysis
has been shown to exhibit a better scaling behavior. The self-affine
multifractal dimensions and multifractal spectrum have been obtai... | hep-ph |
Theory of heavy quark energy loss: We briefly review some of the models and theoretical schemes established to
describe heavy quark quenching in ultrarelativistic heavy ions collisions. Some
lessons are derived from RHIC and early LHC data, especially as for the
contraints they impose on those models. | hep-ph |
Anomalies in charged-current $B$ decays: This paper reviews the recent progresses of the flavor and collider searches
that can probe New Physics effects responsible for the current discrepancy in
the lepton flavor universality ratio of $R_{D^{(*)}}$ between the experimental
measurements and SM values. | hep-ph |
Pseudoscalar Meson Decay Constants and Couplings, the Witten-Veneziano
Formula beyond large N_c, and the Topological Susceptibility: The QCD formulae for the radiative decays $\eta,\eta'\to\c\c$, and the
corresponding Dashen--Gell-Mann--Oakes--Renner relations, differ from
conventional PCAC results due to the gluonic... | hep-ph |
The KLN Theorem and Soft Radiation in Gauge Theories: Abelian Case: We present a covariant formulation of the Kinoshita, Lee, Nauenberg (KLN)
theorem for processes involving the radiation of soft particles. The role of
the disconnected diagrams is explored and a rearrangement of the perturbation
theory is performed suc... | hep-ph |
Baryon Number, Lepton Number, and Operator Dimension in the Standard
Model: We prove that for a given operator in the Standard Model (SM) with baryon
number B and lepton number L, that the operator's dimension is even (odd) if
(B-L)/2 is even (odd). Consequently, this establishes the veracity of
statements that were ... | hep-ph |
High-Energy Proton-Proton Forward Scattering and Derivative Analyticity
Relations: We present the results of several parametrizations to two different ensemble
of data on $pp$ total cross sections $\sigma_{tot}^{pp}$ at the highest
center-of-mass energies (including cosmic-ray information). The results are
statistica... | hep-ph |
Light scalar mesons and charmless hadronic $B_c \to SP, SV$ decays in
the perturbative QCD approach: In this work, based on the assumption of two-quark structure of the scalars,
the charmless hadronic $B_c \to SP, SV$ decays(here, $S$, $P$, and $V$ denote
the light scalar, pseudoscalar, and vector mesons, respectivel... | hep-ph |
The Mueller-Tang jet impact factor at NLO from the high energy effective
action: We report on recent progress in the evaluation of next-to-leading order
observables using Lipatov's QCD high energy effective action. In this
contribution we focus on the determination of the real part of the
next-to-leading order correc... | hep-ph |
Spectroscopy of Exotic Hadrons Formed from Dynamical Diquarks: The dynamical diquark picture asserts that exotic hadrons can be formed from
widely separated colored diquark or triquark components. We use the
Born-Oppenheimer (BO) approximation to study the spectrum of states thus
constructed, both in the basis of diqua... | hep-ph |
Higgs Inflation, Reheating and Gravitino Production in No-Scale
Supersymmetric GUTs: We extend our previous study of supersymmetric Higgs inflation in the context
of no-scale supergravity and grand unification, to include models based on the
flipped SU(5) and the Pati-Salam group. Like the previous SU(5) GUT model,
t... | hep-ph |
Impact of Electroweak Corrections on Neutral Higgs Boson Decays in
Extended Higgs Sectors: Precision predictions play an important role in the search for indirect New
Physics effects in the Higgs sector itself. For the electroweak (EW)
corrections of the Higgs bosons in extended Higgs sectors several
renormalization ... | hep-ph |
Lepton flavor-violating transitions in effective field theory and
gluonic operators: Lepton flavor-violating processes offer interesting possibilities to probe
new physics at multi-TeV scale. We discuss those in the framework of effective
field theory, emphasizing the role of gluonic operators. Those operators are
ob... | hep-ph |
Open charm effects in the explanation of the long-standing "$ρπ$
puzzle": A detailed analysis of the open charm effects on the decays of
$J/\psi(\psi^\prime)\to VP$ is presented, where $V$ stands for light vector
meson and $P$ for light pseudoscalar meson. These are the channels that the
so-called "12% rule" of pertu... | hep-ph |
A fresh look at the generalized parton distributions of light
pseudoscalar mesons: We present a symmetry-preserving scheme to derive the pion and kaon
generalized parton distributions (GPDs) in Euclidean space. The key to
maintaining crucial symmetries under this approach is the treatment of the
scattering amplitude,... | hep-ph |
Precision tools and models to narrow in on the 750 GeV diphoton
resonance: The hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a
significant amount of attention. Since the simplest extensions of the standard
model cannot accommodate the observation, many alternatives have been
considered to exp... | hep-ph |
Tau Portal Dark Matter models at the LHC: Motivated by the Galactic Center gamma-ray excess in the Fermi-LAT data, we
study the signatures of a class of tau portal dark matter (DM) models where DM
particles preferentially couple to tau leptons at the LHC. We consider the
constraints from the DM direct detection and inv... | hep-ph |
NLO QCD Corrections to $B_c$-to-Charmonium Form Factors: The $B_c(^1S_0)$ meson to S-wave Charmonia transition form factors are
calculated in next-to-leading order(NLO) accuracy of Quantum
Chromodynamics(QCD). Our results indicate that the higher order corrections to
these form factors are remarkable, and hence are imp... | hep-ph |
Nucleon sea and the five-quark components: We generalize the approach of Brodsky {\it et al.} for the intrinsic charm
quark distribution in the nucleons to the light-quark sector involving
intrinsic $\bar u, \bar d, s$ and $\bar s$ sea quarks. We compare the
calculations with the existing $\bar d - \bar u$, $s + \bar s... | hep-ph |
Optimizing the pulse shape for Schwinger pair production: Recent studies of the dynamically assisted Schwinger effect have shown that
particle production is significantly enhanced by a proper choice of the
electric field. We demonstrate that optimal control theory provides a
systematic means of modifying the pulse shap... | hep-ph |
A Symmetry Approach to CP Violation: One of the greatest challenges for particle physics in the 1990's is
understanding the broken symmetry of CP violation. It is now almost 30 years
since the discovery in 1964 of the $K_{L} \rightarrow 2\pi$ decay. What has
happened since? Why has there been no significant new experim... | hep-ph |
The anomalous dimension of spin-1/2 baryons in many flavors QCD: The anomalous dimension of spin-1/2 baryon operators in QCD is derived at
leading 1/Nf order using the minimal subtraction scheme. A residual ambiguity,
originating from the presence of evanescent operators in dimensional
regularization, is parametrized b... | hep-ph |
On Equations for the Multi-quark Bound States in Nambu--Jona-Lasinio
Model: In present report we review some preliminary results of investigation of
higher orders of mean-field expansion for Nambu--Jona-Lasinio model. We discuss
first results of investigation of next-to-next-to-leading order of mean-field
expansion e... | hep-ph |
The Reach of LHC (CMS) for Models with Effective Supersymmetry and
Nonuniversal Gaugino Masses: We investigate squark and gluino pair production at LHC (CMS) with subsequent
decays into quarks, leptons and LSP in models with effective supersymmetry
where third generation of squarks is relatively light while the first... | hep-ph |
Phase-shift analysis of low-energy $π^{\pm}p$ elastic-scattering data: Using electromagnetic corrections previously calculated by means of a
potential model, we have made a phase-shift analysis of the $\pi^\pm p$
elastic-scattering data up to a pion laboratory kinetic energy of 100 MeV. The
hadronic interaction was ass... | hep-ph |
Double Lepton Polarization Forward--Backward Asymmetries in B \rar
K^\ast \ell^+ \ell^- Decay in the SM4: This study examines the influence of the fourth generation quarks on the
double lepton polarizations forward--backward asymmetries in B \rar K^\ast
\ell^+ \ell^- decay. We obtain that for both (muon, tau) channel... | hep-ph |
Gauge Extensions of Supersymmetric Models and Hidden Valleys: Supersymmetric models with extended group structure beyond the standard model
are revisited in the framework of general gauge mediation. Sum rules for
sfermion masses are shown to depend genuinely on the group structure, which can
serve as important probes f... | hep-ph |
Fermion Mixings in SU(9) Family Unification: In an SU(9) model of gauged family unification, we propose an explanation for
why angles observed in the lepton flavor ({\it PMNS}) mixing matrix are
significantly larger than those measured for any analagous quark flavor ({\it
KM}) mixing angle. It is directly related to a ... | hep-ph |
Tadpole contribution to magnetic photon-graviton conversion: Photon-graviton conversion in a magnetic field is a process that is usually
studied at tree level, but the one-loop corrections due to scalars and spinors
have also been calculated. Differently from the tree-level process, at one-loop
one finds the amplitude ... | hep-ph |
Accumulating Evidence for the Associated Production of a New Higgs Boson
at the Large Hadron Collider: In the last decades, the Standard Model (SM) of particle physics has been
extensively tested and confirmed, with the announced discovery of the Higgs
boson in 2012 being the last missing puzzle piece. Even though si... | hep-ph |
Flavour Physics in an SO(10) Grand Unified Model: Grand unified theories open the possibility to transfer the neutrino mixing
matrix U_PMNS to the quark sector. This is accomplished in a controlled way in
a supersymmetric grand-unified model proposed by Chang, Masiero and Murayama
(CMM model) where the atmospheric neut... | hep-ph |
Selected topics on tau physics: The B Factories have generated a large amount of new results on the tau
lepton. The present status of some selected topics on tau physics is presented:
charged-current universality tests, bounds on lepton-flavour violation, the
determination of alpha_s from the inclusive tau hadronic wid... | hep-ph |
Scattering amplitudes for e^+e^- --> 3 jets at next-to-next-to-leading
order QCD: We present the calculation of the fermionic contribution to the QCD two-loop
amplitude for e^+e^- --> q qbar g. | hep-ph |
Critical QCD in Nuclear Collisions: A detailed study of correlated scalars, produced in collisions of nuclei and
associated with the $\sigma$-field fluctuations, $(\delta \sigma)^2= < \sigma^2
>$, at the QCD critical point (critical fluctuations), is performed on the
basis of a critical event generator (Critical Monte-... | hep-ph |
A lower bound on the Longitudinal Structure Function at small x from a
self-similarity based model of Proton: Self-similarity based model of proton structure function at small \textit{x}
was reported in the literature sometime back. The phenomenological validity of
the model is in the kinematical region $ 6.2\, \time... | hep-ph |
Bounding Lorentz Violation at Particle Colliders By Tracking the Motion
of Charged Particles: In the presence of Lorentz violation, the motion of a charged particle in a
magnetic field is distorted. By measuring the eccentricities of particles'
elliptical orbits and studying how those eccentricities vary with the abs... | hep-ph |
Application of High Quality Antiproton Beam with Momentum Ranging from 1
GeV/c to 15 GeV/c to Study Charmonium and Charmed Hybrids: The elaborate analysis of spectrum of charmonium states and charmed hybrids
in the mass region over DD-threshold is given. The combined approach based on
the potential model and relativi... | hep-ph |
Deep learning for the R-parity violating supersymmetry searches at the
LHC: Supersymmetry with hadronic R-parity violation in which the lightest
neutralino decays into three quarks is still weakly constrained. This work aims
to further improve the current search for this scenario by the boosted decision
tree method w... | hep-ph |
QCD string and the Lorentz nature of confinement: We address the question of the Lorentz nature of the effective long-range
interquark interaction generated by the QCD string with quarks at the ends.
Studying the Dyson-Schwinger equation for a heavy-light quark-antiquark system,
we demonstrate explicitly how a Lorentz-... | hep-ph |
Challenges and Opportunities for the Next Generation of Photon
Regeneration Experiments: Photon regeneration experiments searching for signatures of oscillations of
photons into hypothetical very weakly interacting ultra-light particles, such
as axions, axion-like and hidden-sector particles, have improved their
sens... | hep-ph |
The Infrared Behavior of One-Loop Gluon Amplitudes at
Next-to-Next-to-Leading Order: For the case of $n$-jet production at next-to-next-to-leading order in the
QCD coupling, in the infrared divergent corners of phase space where particles
are collinear or soft, one must evaluate $(n+1)$-parton final-state one-loop
am... | hep-ph |
Physics of heavy neutrinos: Theoretical and experimental situation in physics of heavy neutrinos
$(M_N>M_Z)$ is briefly presented. Various experimental bounds on heavy neutrino
masses and mixings are shortly reviewed. Special attention is paid to
possibility of detecting heavy neutrinos in future lepton linear collider... | hep-ph |
Small Shear Viscosity of a Quark-Gluon Plasma Implies Strong Jet
Quenching: We derive an expression relating the transport parameter $\hat{q}$ and the
shear viscosity $\eta$ of a weakly coupled quark-gluon plasma. A deviation from
this relation can be regarded as a quantitative measure of ``strong coupling''
of the m... | hep-ph |
Determination of the spectroscopic parameters of beauty-partners of
$T_{cc}$ from QCD: Motivated by the recent discovery of a new tetra-quark $T_{cc}^+$ state with
two charm quarks and two light quarks by LHCb collaboration, we calculate the
spectroscopic parameters, namely, the mass and residues of beauty partners o... | hep-ph |
First extraction of the scalar proton dynamical polarizabilities from
real Compton scattering data: We present the first attempt to extract the scalar dipole dynamical
polarizabilities from proton real Compton scattering data below pion-production
threshold. The theoretical framework combines dispersion relations tec... | hep-ph |
Test for Lorentz and CPT Violation with the MiniBooNE Low-Energy Excess: The MiniBooNE experiment is a $\nu_\mu\to\nu_e$ and $\bar\nu_\mu\to\bar\nu_e$
appearance neutrino oscillation experiment at Fermilab. The neutrino mode
oscillation analysis shows an excess of $\nu_e$ candidate events in the
low-energy region. Thes... | hep-ph |
Study of kaon structure using the light-cone quark model: We investigate the various distributions explaining multi-dimensional
structure of kaon at the level of its constituents ($u$ and $\bar{s}$) using
the light-cone quark model. The overlap form of wavefunctions associated with
the light-cone quark model is adopted... | hep-ph |
Nuclear Structure Functions at Small x in Multiple Scattering Approaches: A simple model for nuclear structure functions in the region of small $x$ and
small and moderate $Q^2$, is presented. It is a parameter-free extension, in
the Glauber-Gribov approach to nuclear collisions, of a saturation model for
the nucleon. A... | hep-ph |
A Susy Phase Transition as Central Engine: For several decades the energy source powering supernovae and gamma ray
bursts has been a troubling mystery. Many articles on these phenomena have been
content to model the consequences of an unknown "central engine" depositing a
large amount of energy in a small region. In th... | hep-ph |
Stops in R-parity Breaking Model for High-$Q^2$ Events at HERA: We investigate an event excess in the reaction $e^+p \to e^+ X$ with large
$x$ and high $Q^2$ observed at HERA and show that the events could naturally be
interpreted as a signature of the production of the scalar top quarks (stops)
in a supersymmetric mod... | hep-ph |
Heavy Quark State Production In p-p Collisions: We estimate the relative probabilities of $\Psi'(2S)$ to $J/\Psi$ production
at BNL-RHIC and $\Upsilon(nS)$ production at the LHC and Fermilab in p-p
collisions, using our recent theory of mixed heavy quark hybrids, in which the
$\Psi'(2S)$ and $\Upsilon(3S)$ mesons have ... | hep-ph |
Vector-scalar mixing to all orders, for an arbitrary gauge model in the
generic linear gauge: I give explicit fromulae for full propagators of vector and scalar fields in
a generic spin-1 gauge model quantized in an arbitrary linear covariant gauge.
The propagators, expressed in terms of all-order one-particle-irredu... | hep-ph |
Benchmarking LHC searches for light 2HDM+$\boldsymbol{a}$ pseudoscalars: Using two suitable benchmark scenarios that satisfy the experimental
constraints on the total decay width of the $125 \, {\rm GeV}$ Higgs boson, we
determine the bounds on light CP-odd spin-0 states in the 2HDM+$a$ model that
arise from existing L... | hep-ph |
Report of Working Group on Electromagnetic Corrections: The talks delivered by M. Knecht, H. Neufeld, V.E. Lyubovitskij, A. Rusetsky
and J. Soto during the session of the working group of electromagnetic
corrections to hadronic processes at the Eight International Symposium MENU99,
cover a wide range of problems. In pa... | hep-ph |
Physics with near detectors at a neutrino factory: We discuss the impact of near detectors at a neutrino factory both on
standard oscillation and non-standard interaction measurements. Our systematics
treatment includes cross section errors, flux errors, and background
uncertainties, and our near detector fluxes includ... | hep-ph |
Spectrum for Heavy Quankonia and Mixture of the Relevant Wave Functions
within the Framework of Bethe-Salpeter Equation: Considering the fact that some excited states of the heavy quarkonia
(charmonium and bottomonium) still missing in experimental observations and
potential applications of the relevant wave function... | hep-ph |
Non linear evolution: revisiting the solution in the saturation region: In this paper we revisit the problem of the solution to Balitsky-Kovchegov
equation deeply in the saturation domain. We find that solution has the form of
Levin-Tuchin solution but it depends on variable $\bar{z} = \ln(r^2 Q^2_s) +
\mbox{Const}$ an... | hep-ph |
Probing the neutrino mass matrix in next generation neutrino oscillation
experiments: We review the current status of the neutrino mass and mixing parameters
needed to reconstruct the neutrino mass matrix. A comparative study of the
precision in the measurement of oscillation parameters expected from the next
generat... | hep-ph |
Multi-jet Production in Hadron Collisions: The advent of high-energy hadron colliders necessitates efficient and
accurate computation of multi-jet production processes, both as QCD processes
in their own right and as backgrounds for other physics. The algorithm that
performs these tasks and a brief numerical study of m... | hep-ph |
Soft spin correlations in final-state parton showers: We introduce a simple procedure that resolves the long-standing question of
how to account for single-logarithmic spin-correlation effects in parton
showers not just in the collinear limit, but also in the soft wide-angle limit,
at leading colour. We discuss its imp... | hep-ph |
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