id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
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hep-ph/9206234 | Hopf Textures | A Hopf texture is a vacuum field configuration of isovector fields which is
an onto map from the space as a large three sphere to the vacuum manifold
$S^2$. We construct a Hopf texture with spherically symmetric energy density
and discuss the topological charge. A Hopf texture collapses, and we study the
collapse proce... | 1992-06-18 | 2007-05-23 | [
"hep-ph"
] | Sun Hong Rhie and David P. Bennett |
hep-ph/9206227 | On the phase transition in the scalar theory | The basic tool for the study of the electroweak phase transition is $V_{eff}
(\phi,T)$, the one-loop finite-temperature effective potential, improved by
all-loop resummations of the most important infrared contributions. In this
paper we perform, as a first step towards a full analysis of the Standard Model
case, a det... | 1992-06-17 | 2008-11-26 | [
"hep-ph"
] | J. R. Espinosa, M. Quir\'os and F. Zwirner |
hep-ph/9206225 | Walking Technicolor and Electroweak Radiative Corrections | We examine the effect of walking technicolor dynamics on the electroweak $S$
parameter and contrast it with the effect of QCD-like technicolor dynamics. Our
main tools are the operator product expansion for the high-momentum behavior of
the electroweak gauge boson vacuum polarizations and the analyticity of these
polar... | 1992-06-17 | 2009-09-15 | [
"hep-ph"
] | Raman Sundrum and Stephen D. H. Hsu |
hep-ph/9206231 | Accidental Approximate Generation Universality and its Possible
Verification | The universality of $e-\mu-\tau$ interactions may only be an accidental
approximate symmetry analogous to that of flavor SU(2) and SU(3). This was
specifically realized by an extension of the standard model proposed in 1981.
Two key predictions are that the $\tau$ lifetime should be longer and that the
$\rho$ parameter... | 1992-06-17 | 2007-05-23 | [
"hep-ph"
] | Ernest Ma |
hep-ph/9206230 | Chiral Perturbation Theory for SU(3) Breaking in Heavy Meson Systems | The SU(3) breaking effects due to light quark masses on heavy meson masses,
decay constants ($F_{D}, F_{D_{s}}$) and the form factor for semileptonic
$\overline{B}\rightarrow D^{(\ast)} l\bar{\nu}_{l}$ transitions are formulated
in chiral perturbation theory, using a heavy meson effective Lagrangian and
expanding in in... | 1992-06-17 | 2014-11-17 | [
"hep-ph"
] | J.L. Goity |
hep-ph/9206228 | Implications of New Gallex Results for the MSW Solution of the Solar
Neutrino Problem | We compare the implications for 7Be and pp neutrinos of the two MSW fits to
the new GALLEX solar neutrino measurements . Small mixing angle solutions tend
to suppress the former as electron-neutrinos, but not the latter, and large
angle solutions tend to reduce both by about a factor of 2. The consequences
for BOREXINO... | 1992-06-17 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | J. M. Gelb, Waikwok Kwong, and S. P. Rosen |
hep-ph/9206229 | Semilocal Topological Defects | Semilocal defects are those formed in field theories with spontaneously
broken symmetries, where the vacuum manifold $M$ is fibred by the action of the
gauge group in a non-trivial way. Studied in this paper is the simplest such
class of theories, in which $M\simeq S^{2N-1}$, fibred by the action of a local
$U(1)$ symm... | 1992-06-17 | 2011-07-19 | [
"hep-ph",
"hep-th"
] | Mark Hindmarsh |
hep-ph/9206226 | Fixing the Top-Quark and Higgs-Boson Masses | If the quadratic divergence of the standard electroweak model and its local
variation with mass scale are both assumed to be zero, then a modified one-loop
calculation yields m_t = 117 GeV and m_H = 183 GeV. Such a scenario may be the
result of an underlying theory to be revealed at a much higher mass scale. | 1992-06-16 | 2015-06-25 | [
"hep-ph"
] | Ernest Ma |
hep-ph/9206224 | Exact Nonperturbative Unitary Amplitudes for 1->8 Transitions in a Field
Theoretic Model | We present a quantum mechanical model with an infinite number of (discrete)
degrees of freedom, which can serve as a laboratory for multiparticle
production in a collision. There is a cubic coupling between modes without,
however, any problems associated with unstable ground states. The model is
amenable to precise num... | 1992-06-16 | 2008-11-26 | [
"hep-ph"
] | H. Goldberg and M. T. Vaughn |
hep-ph/9206223 | Infrared Effects and Bubble Propagation at the Electroweak Phase
Transition | We discuss aspects of poor infrared behaviour of the perturbation expansion
for the effective potential of the Higgs mode near the electroweak phase
transition, and enlarge on the discovery that higher order effects weaken the
transition. In addition, we outline our recent attempts at understanding the
dynamics involve... | 1992-06-15 | 2008-02-03 | [
"hep-ph"
] | R.G. Leigh |
hep-ph/9206221 | Probing New Gauge Boson Couplings via Three-Body Decays | We examine the possibility of using rare, 3-body decays of a new neutral
gauge boson, \ztwo, to probe its gauge couplings at hadron colliders.
Specifically, we study the decays $\ztwo\to W\ell\nu$ and $\ztwo\to
Z\nu\bar\nu$ and find that much knowledge of the \ztwo\ properties can be
obtained from these processes. In p... | 1992-06-15 | 2009-10-22 | [
"hep-ph"
] | J.L. Hewett and T.G. Rizzo |
hep-ph/9206222 | Analyticity, Crossing Symmetry and the Limits of Chiral Perturbation
Theory | The chiral Lagrangian for Goldstone boson scattering is a power series
expansion in numbers of derivatives. Each successive term is suppressed by
powers of a scale, $\Lambda_\chi$, which must be less than of order $4\pi
f/\sqrt{N}$ where $f$ is the Goldstone boson decay constant and $N$ is the
number of flavors. The ch... | 1992-06-15 | 2013-11-13 | [
"hep-ph",
"hep-lat"
] | R. Sekhar Chivukula, M. Dugan, and M. Golden |
hep-ph/9206219 | Z' Decays into Four Fermions | If a new $Z'$ is discovered with a mass $\sim 1 \ TeV$ at LHC/SSC, its (rare)
decays into two charged leptons plus missing transverse energy will probe the
$Z'$ coupling to the lepton doublet $(\nu,e)_L$ and to $W^+W^-$, allowing
further discrimination among extended electroweak models. | 1992-06-12 | 2009-10-22 | [
"hep-ph"
] | F. del Aguila, B. Alles, Ll. Ametller and A. Grau |
hep-ph/9206220 | Electroweak Baryogenesis: An Overview (Where are We Now?) | It now seems plausible that the observed baryon asymmetry may have been
produced at the electroweak phase transition. We review the considerations
which lead to this conclusion, focusing on the obstacles to making reliable
estimates. These arise from incomplete knowledge of baryon-violating rates near
the phase transit... | 1992-06-12 | 2008-02-03 | [
"hep-ph"
] | Michael Dine |
hep-ph/9206217 | Effective Heavy Quark Theory | We show how heavy quark effective theory, including 1/M corrections, may be
matched onto dynamical quark models by making a specific choice of K,m and v in
the p=mv+K expansion. We note that Wigner rotations of heavy quark spins arise
at $O(p^2/m^2)$ in non-relativistic models but at $O(\Lambda_{QCD}/M_Q)$ or
O(velocit... | 1992-06-11 | 2010-11-01 | [
"hep-ph"
] | Frank Close and Zhenping Li |
hep-ph/9206215 | Neutrino Magnetic Moment Model and Solar Neutrino Problem | We examine the time variation problem of solar neutrinos in the spin-flavour
precession mechanism taking into account the $\nu_e$-$\nu_{\mu}$ mixing. The
models with the small and large mixing angle are studied. It shows that the
models which realize $m_{\nu_e\nu_e} \sim m_{\nu_{\mu}\nu_{\mu}} \ll
m_{\nu_e\nu_{\mu}}$ a... | 1992-06-11 | 2007-05-23 | [
"hep-ph"
] | Yasuji Ono and Daijiro Suematsu |
hep-ph/9206218 | Aspects of Radiative Electroweak Symmetry Breaking in Supergravity
Models | We discuss several aspects of state-of-the-art calculations of radiative
electroweak symmetry breaking in supergravity models. These models have a
five-dimensional parameter space in contrast with the 21-dimensional one of the
MSSM. We examine the Higgs one-loop effective potential $V_1=V_0+\Delta V$, in
particular how... | 1992-06-11 | 2009-10-22 | [
"hep-ph"
] | S. Kelley, J. Lopez, D. Nanopoulos, H. Pois, and K. Yuan |
hep-ph/9206216 | Semilocal Defects | I analyze the interplay of gauge and global symmetries in the theory of
topological defects. In a two-dimensional model in which both gauge symmetries
and {\it exact} global symmetries are spontaneously broken, stable vortices may
fail to exist even though magnetic flux is topologically conserved. Following
Vachaspati ... | 1992-06-11 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | John Preskill |
hep-ph/9206214 | Debye Screening and Baryogenesis during the Electroweak Phase Transition | We examine a recent claim that Debye screening will affect the charge
transport mechanism of anomalous electroweak baryogenesis. We show that the
effects of gauge charge screening do not affect the baryon number produced
during a first order electroweak phase transition. (Requires harvmac.tex) | 1992-06-10 | 2009-10-22 | [
"hep-ph"
] | A. G. Cohen, D. B. Kaplan and A. E. Nelson |
hep-ph/9206213 | Exact Nonperturbative Unitary Amplitudes for 1->N Transitions | I present an extension to arbitrary N of a previously proposed field
theoretic model, in which unitary amplitudes for $1->8$ processes were
obtained. The Born amplitude in this extension has the behavior
$A(1->N)^{tree}\ =\ g^{N-1}\ N!$ expected in a bosonic field theory. Unitarity
is violated when $|A(1->N)|>1$, or wh... | 1992-06-08 | 2009-10-22 | [
"hep-ph"
] | Haim Goldberg |
hep-ph/9206212 | Cosmic $\Delta B$ from Lepton Violating Interactions at the Electroweak
Phase Transition | We propose a new mechanism for late cosmological baryon asymmetry in models
with first order electroweak phase transition. Lepton asymmetry arises through
the decay of particles produced out of equilbrium in bubble collisions and is
converted into baryon asymmetry by sphalerons. Supersymmetric models with
explicitly br... | 1992-06-05 | 2011-07-19 | [
"hep-ph"
] | Antonio Masiero and Antonio Riotto |
hep-ph/9206209 | Standard Model Contributions to the Neutrino Index of Refraction in the
Early Universe | With the standard electroweak interactions, the lowest-order coherent forward
scattering amplitudes of neutrinos in a CP symmetric medium (such as the early
universe) are zero, and the index of refraction of a propagating neutrino can
only arise from the expansion of gauge boson propagators, from radiative
corrections,... | 1992-06-04 | 2009-12-30 | [
"hep-ph"
] | Paul Langacker and Jiang Liu |
hep-ph/9206208 | Can HERA See an $e u --> e c$ Signal of a Virtual Leptoquark? | Virtual leptoquarks could be detected at HERA through some nonstandard
effects. Here we explore the possibility that virtual leptoquarks could be
discovered via $e u --> e c$ scattering, assuming integrated luminosity of 200
pb$^{-1}$ and charm identification efficiency of 1%. We study the implications
of low energy da... | 1992-06-04 | 2009-10-22 | [
"hep-ph"
] | Miriam Leurer (Weizmann Institute) |
hep-ph/9206210 | Discrete Symmetry, Neutrino Magnetic Moment and the 17 Kev Neutrino | The problem of generating large transition magnetic moments for nearly
massless neutrinos in a truly three--generation case is discussed. A model to
achieve the same by exploiting an octahedral symmetry is presented. The scheme
also accomodates a radiatively generated mass of $17\:keV$ for a pseudo--Dirac
neutrino that... | 1992-06-04 | 2009-10-22 | [
"hep-ph"
] | Debajyoti Choudhury |
hep-ph/9206211 | Hadronic Instabilities in Very Intense Magnetic Fields | Composite hadronic states exhibit interesting properties in the presence of
very intense magnetic fields, such as those conjectured to exist in the
vicinity of certain astrophysical objects. We discuss three scenarios. (i) The
presence of vector particles with anomalous magnetic moment couplings to scalar
particles, in... | 1992-06-04 | 2009-10-22 | [
"hep-ph"
] | Myron Bander and Hector Rubinstein |
hep-ph/9206206 | Analysis of Running Coupling Constant Unification in String Theory | We use recently obtained 2-loop string coupling constants to analyze a class
of string models based on orbifold compactification. Assuming weak coupling at
the string scale and single-scale unification leads to restrictions on the
spectrum of massive (between the string scale and the weak scale) matter
supermultiplets ... | 1992-06-03 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Mary K. Gaillard and Rulin Xiu |
hep-ph/9206205 | Flavor changing interactions mediated by scalars at the weak scale | The quark and lepton mass matrices possess approximate flavor symmetries.
Several results follow if the interactions of new scalars possess these
approximate symmetries. Present experimental bounds allow these exotic scalars
to have a weak scale mass. The Glashow-Weinberg criterion is rendered
unnecessary. Finally, rar... | 1992-06-03 | 2009-10-22 | [
"hep-ph"
] | Aram Antaramian, Lawrence J. Hall, Andrija Ra\v{s}in |
hep-ph/9206204 | Interpretation of Precision Measurements in the Strongly Interacting
Limit of the Standard Electroweak Model | Strong rescattering corrections to one-loop contributions to the parameters
of the standard electroweak model are considered. | 1992-06-03 | 2009-10-22 | [
"hep-ph"
] | Mary K. Gaillard |
hep-ph/9206207 | Reply to Comments on ``Asymptotic Estimate of the {\it n}-Loop QCD
Contribution to the Total $e^{+}e^{-}$ Annihilation Cross Section'' | Reply to Comments on ``Asymptotic Estimate of the {\it n}-Loop QCD
Contribution to the Total $e^{+}e^{-}$ Annihilation Cross Section'' | 1992-06-03 | 2007-05-23 | [
"hep-ph"
] | Geoffrey B. West |
hep-ph/9206201 | Baryogenesis from Unstable Domain Walls | There exists a class of cosmic strings that turn matter into antimatter
(Alice strings). In a GUT where the unbroken gauge group contains charge
conjugation ($C$), such strings form when a phase transition renders $C$ a
discrete symmetry. They become boundaries of domain walls at a later,
$C$-breaking transition. These... | 1992-06-01 | 2016-09-01 | [
"hep-ph",
"astro-ph"
] | Shahar Ben-Menahem (SLAC) and Adrian R. Cooper (USC) |
hep-ph/9206203 | Constraints From Gauge Coupling Unification On The Scale Of
Supersymmetry Breaking | We reanalyze precision LEP data and coupling constant unification in the
minimal supersymmetric $SU(5)$ model including the evolution of the gaugino
masses. We derive general bounds on the primordial gaugino
supersymmetry-breaking mass-scale $m_{1/2}$ in terms of the various input
parameters. The model cannot accommoda... | 1992-06-01 | 2008-11-26 | [
"hep-ph"
] | John Ellis, S. Kelley and D. V. Nanopoulos |
hep-ph/9206202 | Heavy Axions From Strong Broken Horizontal Gauge Symmetry | We study the consequences of the existence and breaking of a Peccei--Quinn
symmetry within the context of a dynamical model of electroweak symmetry
breaking based on broken gauged flavour symmetries. We perform an estimate of
the axion mass by including flavour instanton effects and show that, for low
cut--offs, the ax... | 1992-06-01 | 2009-10-22 | [
"hep-ph"
] | T.Elliott and S.F.King |
hep-ph/9205246 | On Observing Top Quark Production at the Tevatron | A technique for separating top quark production from Standard Model
background events is introduced. It is applicable to the channel in which one
top quark decays semi-leptonically and its anti-quark decays hadronically into
three jets, or vice versa. The method is shown to discriminate dramatically
between Monte Carlo... | 1992-05-30 | 2010-11-01 | [
"hep-ph"
] | Gary R. Goldstein, K. Sliwa, and R.H. Dalitz |
hep-ph/9205247 | Higgs sector CP violation in the Minimal Supersymmetric Model | We study the possibility that CP is spontaneously broken in the Minimal
Supersymmetric Model when radiative corrections to the Higgs potential are
included. We show that this can only occur if a light Higgs boson exists.
Considering the recent ALEPH Higgs search, we exclude most of the parameter
space of the model. The... | 1992-05-30 | 2010-11-01 | [
"hep-ph"
] | Alex Pomarol |
hep-ph/9205245 | QCD Corrections to the Charged-Higgs-Boson Decay of a Heavy Top Quark | It is shown that up to an over all scale the lowest-order QCD corrections to
$t\to H^+b$ and to $t\to W^+b$ are the same in the heavy top limit.
Asymptotically, they are given by $-{4\alpha_s\over 3\pi}[{\pi^2\over
3}-{5\over 4}]$, resulting in a reduction in the decay rate by about $9\%$,
rather than $6\%$ reported pr... | 1992-05-29 | 2009-10-22 | [
"hep-ph"
] | Jiang Liu and York-Peng Yao |
hep-ph/9205244 | Resonant Spin-Flavor Precession of Neutrinos As a Possible Solution to
the Solar Neutrino Problem | Recent developments of the resonant neutrino spin-flavor precession scenario
and its applications to the solar neutrino problem are reviewed. We discuss in
particular the possibilities of reconciliation of strong time variations of the
solar neutrino flux observed in the Homestake ${}^{37}\$Cl experiment with
little or... | 1992-05-29 | 2007-05-23 | [
"hep-ph"
] | Eugeni Akhmedov |
hep-ph/9205241 | Nonleptonic decays of K mesons revisited | We estimate nonfactorizable 1/$N_c$ contributions in the $K\rightarrow 2\pi$
amplitudes using the approach proposed in our previous work. It is demonstrated
that for the conventional (nonpenguin) operators these contributions are close
in magnitude to factorizable $1/N_c$ parts and have the opposite sign. Thus, an
appr... | 1992-05-28 | 2010-11-01 | [
"hep-ph"
] | B. Blok and M. Shifman |
hep-ph/9205242 | Running Nonlocal Lagrangians | We investigate the renormalization of ``nonlocal'' interactions in an
effective field theory using dimensional regularization with minimal
subtraction. In a scalar field theory, we write an integro-differential
renormalization group equation for every possible class of graph at one loop
order. | 1992-05-28 | 2007-05-23 | [
"hep-ph"
] | V. Bhansali and H. Georgi |
hep-ph/9205243 | Baryons Containing a Heavy Quark as Solitons | The possibility of interpreting baryons containing a single heavy quark as
bound states of solitons (that arise in the nonlinear sigma model) and heavy
mesons is explored. Particular attention is paid to the parity of the bound
states and to the role of heavy quark symmetry. | 1992-05-28 | 2008-11-26 | [
"hep-ph"
] | Elizabeth Jenkins, Aneesh V. Manohar, and Mark B. Wise |
hep-ph/9205240 | Predictions for neutral K and B meson physics | Using supersymmetric grand unified theories, we have recently invented a
framework which allows the prediction of three quark masses, two of the
parameters of the Kobayashi-Maskawa matrix and tan $\beta$, the ratio of the
two vevs. These predictions are used to calculate $\epsilon$ and $\epsilon'$ in
the kaon system, B... | 1992-05-27 | 2010-01-06 | [
"hep-ph"
] | Savas Dimopoulos, Lawrence Hall and Stuart Raby |
hep-ph/9205238 | Radiative Correction Effects of a Very Heavy Top | If the top is very heavy, m_t >> M_Z, the dominant radiative correction
effects in all electroweak precision tests can be exactly characterized in
terms of two quantities, the rho-parameter and the GIM violating Z -> b bbar
coupling. These quantities can be computed using the Standard Model Lagrangian
with vanishing ga... | 1992-05-27 | 2009-10-22 | [
"hep-ph"
] | Riccardo Barbieri, Matteo Beccaria, Paolo Ciafaloni, Giuseppe Curci
and Andrea Vicere' |
hep-ph/9205237 | Best Fit to the Gluino Mass | Assuming that perturbative QCD is the dominant explanation for the narrowness
of the vector quarkonia, we perform a $\chi^2$ minimization analysis of their
hadronic decays as a function of two parameters, the mass of the gluino and the
value of ${\alpha}_3(M_Z)$. A value below 1 GeV for the gluino mass is strongly
pref... | 1992-05-27 | 2008-11-26 | [
"hep-ph"
] | L. Clavelli, P.W. Coulter and Kajia Yuan |
hep-ph/9205239 | Anomalous Radiative Decay of Heavy Higgs Boson | The radiative decay width of a heavy Higgs boson $H \rightarrow W^+W^-\gamma$
for a {\it hard} photon is calculated in the Standard Model and its extension
with anomalous $\gamma WW$ couplings. Its dependence on the Higgs mass, the two
unknown anomalous couplings, and the photon energy cutoff are studied in
detail. We ... | 1992-05-27 | 2007-05-23 | [
"hep-ph"
] | Tzu Chiang Yuan |
hep-ph/9205236 | Dispersion Relations in Quantum Chromodynamics | Dispersion relations for the scattering of hadrons are considered within the
framework of Quantum Chromodynamics. It is argued that the original methods of
proof remain applicable. The setting and the spectral conditions are provided
by an appropriate use of the BRST cohomology. Confinement arguments are used in
order ... | 1992-05-26 | 2007-05-23 | [
"hep-ph"
] | Reinhard Oehme |
hep-ph/9205234 | Computing the Weak Mixing Angle from Anomaly Cancellation | I remark that the weak mixing angle in the standard model may be computed
even in the absence of a grand unification symmetry. In particular, if there is
an additional gauged $U(1)$ symmetry at some large scale which can be made
anomaly-free only by a Green-Schwarz (GS) mechanism, this typically results in
a prediction... | 1992-05-26 | 2016-09-01 | [
"hep-ph"
] | L.E. Ib\'a\~nez |
hep-ph/9205233 | Bounds on Microscopic Physics from P and T Violation in Atoms and
Molecules | Atomic and molecular electric dipole moments are calculated within the
minimal supersymmetric standard model. Present experiments already provide
strong bounds on the combination of phases responsible for the dipole moments
of the neutron and closed shell atoms. For a supersymmetry breaking scale of
100 GeV, these phas... | 1992-05-26 | 2010-11-01 | [
"hep-ph"
] | Willy Fischler, Sonia Paban, and Scott Thomas |
hep-ph/9205235 | Covariant gauges at finite temperature | A prescription is presented for real-time finite-temperature perturbation
theory in covariant gauges, in which only the two physical degrees of freedom
of the gauge-field propagator acquire thermal parts. The propagators for the
unphysical degrees of freedom of the gauge field, and for the Faddeev-Popov
ghost field, ar... | 1992-05-26 | 2009-10-22 | [
"hep-ph"
] | P V Landshoff and A Rebhan |
hep-ph/9205232 | Finite Temperature Scalar Potential from a 1/N Expansion | We compute the leading and next--to--leading corrections to the finite
temperature scalar potential for a 3+1 dimensional $\phi^4$ theory using a
systematic $1/N$ expansion. Our approach automatically avoids problems
associated with infrared divergences in ordinary perturbation theory in
$\hbar$. The leading order resu... | 1992-05-25 | 2009-10-22 | [
"hep-ph"
] | Vidyut Jain |
hep-ph/9205231 | Z(N) interface tension in a hot SU(N) gauge theory | The interface tension between Z(N) vacua in a hot SU(N) gauge theory (without
dynamical fermions) is computed at next to leading order in weak coupling. The
Z(N) interface tension is related to the instanton of an effective action,
which includes both classical and quantum terms; a general technique for
treating consis... | 1992-05-24 | 2007-05-23 | [
"hep-ph"
] | T. Bhattacharya, A. Gocksch, C. P. Korthals-Altes, and R. D. Pisarski |
hep-ph/9205230 | Planck-Scale Physics and Neutrino Masses | We discuss gravitationally induced masses and mass splittings of Majorana,
Zeldovich-Konopinski-Mahmoud and Dirac neutrinos. Among other implications,
these effects can provide a solution of the solar neutrino puzzle. In
particular, we show how this may work in the 17 keV neutrino picture. | 1992-05-22 | 2008-11-26 | [
"hep-ph"
] | Eugeni Akhmedov, Zurab Berezhiani and Goran Senjanovic |
hep-ph/9205229 | Axino Mass | The mass of the axino is computed in realistic supersymmetric extensions of
the standard model. It is found to be strongly model dependent and can be as
small as a few keV but also as large as the gravitino mass. Estimates of this
mass can only be believed once a careful analysis of the scalar potential has
been perfor... | 1992-05-22 | 2008-11-26 | [
"hep-ph"
] | E. J. Chun, Jihn E. Kim and H. P. Nilles |
hep-ph/9205228 | Reparameterisation Invariance Constraints on Heavy Particle Effective
Field Theories | Since fields in the heavy quark effective theory are described by both a
velocity and a residual momentum, there is redundancy in the theory: small
shifts in velocity may be absorbed into a redefinition of the residual
momentum. We demonstrate that this trivial reparameterisation invariance has
non-trivial consequences... | 1992-05-21 | 2010-11-01 | [
"hep-ph"
] | Michael Luke and Aneesh V. Manohar |
hep-ph/9205226 | Recent Developments in Superstring Phenomenology | Recent developments in superstring phenomenology are summarized on a
non-technical level. (Talk presented at the XXVIIth Rencontre de Moriond on
Electroweak Interactions and Unified Theories.) | 1992-05-20 | 2007-05-23 | [
"hep-ph"
] | Jan Louis |
hep-ph/9205225 | Strong CP-Problem in Superstring Theory | We apply the solution for the strong CP-problem in the 4-dimensional
superstring theory recently proposed by Ib${\rm\acute{a}\tilde{n}}$ez and
L${\rm\ddot{u}}$st to Calabi-Yau type models and study its phenomenological
aspects. In Calabi-Yau type models there seem to be phenomenologically
difficult problems in the axio... | 1992-05-20 | 2017-02-01 | [
"hep-ph"
] | Daijiro Suematsu |
hep-ph/9205227 | Supersymmetry, Naturalness, and Dynamical Supersymmetry Breaking | Models with dynamical supersymmetry breaking have the potential to solve many
of the naturalness problems of hidden sector supergravity models. We review the
argument that in a generic supergravity theory in which supersymmetry is {\it
dynamically} broken in the hidden sector, only tiny Majorana masses for
gauginos are... | 1992-05-20 | 2009-10-22 | [
"hep-ph"
] | M. Dine and D. A. MacIntire |
hep-ph/9205224 | Axions with Variable Masses | Axions with variable masses, in the context of a scalar--tensor gravity
theory, give a large entropy production during the matter era. The subsequent
axion dilution is proportional to their present energy density. Depending on
the parameters ($\beta_I,\beta_V$) of the model, this dilution relaxes or even
eludes the cos... | 1992-05-19 | 2007-05-23 | [
"hep-ph"
] | Juan Garcia-Bellido |
hep-ph/9205223 | $\theta$ Bag and Quark Confinement | We propose $\theta$ bag through the wall separating $\theta=0$ and
$\theta=\pi$. $\theta$ may or may not be a dynamical field generating the wall.
For a massive pseudo scalar $\theta$, we present a two Higgs doublet model. We
also presnt an idea for quark confinement within this $\theta$ bag scheme. | 1992-05-18 | 2009-10-22 | [
"hep-ph"
] | Jihn E. Kim |
hep-ph/9205222 | Constraints on Mirror Fermion Mixing Angles from Anomalous Magnetic
Moment Data | The new contributions to the electron (muon) anomalous magnetic moment
arising in mirror fermion theories have been calculated. Imposing the
experimental constraint lowers the current upper bound on the ordinary - mirror
lepton mixing angles by a factor of 50 making predictions for mirror lepton
production at HERA unde... | 1992-05-15 | 2009-10-22 | [
"hep-ph"
] | F. Csikor and Z.Fodor |
hep-ph/9205221 | Nonfactorizable Amplitudes in Weak Nonleptonic Decays of Heavy Mesons | We discuss nonfactorizable $1/N_c$ contributions in the amplitudes of
non-leptonic exclusive decays of the type $B\rightarrow D\pi$ ($N_c$ is the
number of colors). In a certain kinematical limit rather reliable estimates are
possible. It is demonstrated that the nonfactorizable parts are of the same
order as the facto... | 1992-05-15 | 2010-11-01 | [
"hep-ph"
] | B. Blok and M. Shifman |
hep-ph/9205219 | A General Lower Bound for Radiative B Decay | In a wide class of models -- including the standard model -- flavor-changing
neutral currents are suppressed by an approximate chiral symmetry of the
low-energy lagrangian. This symmetry allows the derivation of general relations
among low-energy flavour-changing processes. We derive one such: the relative
sizes of the... | 1992-05-14 | 2008-02-03 | [
"hep-ph"
] | David Atwood, C.P. Burgess and A. Soni |
hep-ph/9205217 | Screening of Very Intense Magnetic Fields by Chiral Symmetry Breaking | In very intense magnetic fields, $B > 1.5\times 10^{14}$ T, the breaking of
the strong interaction $SU(2)\times SU(2)$ symmetry arranges itself so that
instead of the neutral $\sigma$ field acquiring a vacuum expectation value it
is the charged $\pi$ field that does and the magnetic field is screened.
Details are prese... | 1992-05-13 | 2009-10-22 | [
"hep-ph"
] | Myron Bander and Hector Rubinstein |
hep-ph/9205218 | New Probes for Extended Gauge Structures at HERA | Doncheski and Hewett have recently shown that the ratio of neutral current to
charged current cross sections, $R={\sigma_{NC}}/{\sigma_{CC}}$, can provide a
more sensitive probe for the existence of heavy leptoquarks at HERA than the
usual proceedure which makes use of neutral current asymmetries. The apparent
reason f... | 1992-05-13 | 2009-10-22 | [
"hep-ph"
] | T.G. Rizzo |
hep-ph/9205220 | Fast Neutrino Decay in the Minimal Seesaw Model | Neutrino decay in the minimal seesaw model containing three right handed
neutrinos and a complex $SU(2)\times U(1)$ singlet Higgs in addition to the
standard model fields is considered. A global horizontal symmetry $U(1)_H$ is
imposed, which on spontaneous breaking gives rise to a Goldstone boson. This
symmetry is chos... | 1992-05-13 | 2009-10-22 | [
"hep-ph"
] | Anjans S. Joshipura and Saurabh D. Rindani |
hep-ph/9205215 | 4-dimensional spontaneously broken U(1)L gauge theories without
asymptotic quarks and Higgs boson | We show, in the case of a U(1)L spontaneously broken gauge theory, how
introducing a composite Wess-Zumino field, with a derivative coupling to the
fermionic current, and a composite scalar sector leads to infinitely massive
quarks and Higgs boson, making them unobservable as asymptotic states. This
results from the co... | 1992-05-12 | 2008-02-03 | [
"hep-ph",
"hep-th"
] | B. Machet |
hep-ph/9205216 | Dark Matter with Variable Masses | String effective theories contain a dilaton scalar field which couples to
gravity, matter and radiation. In general, particle masses will have different
dilaton couplings. We can always choose a conformal frame in which baryons have
constant masses while (non--baryonic) dark matter have variable masses, in the
context ... | 1992-05-11 | 2010-11-30 | [
"hep-ph"
] | Juan Garcia-Bellido |
hep-ph/9205213 | Large-order perturbation theory for the electromagnetic current-current
correlation function | The constraints imposed by asymptotic freedom and analyticity on the
large-order behavior of perturbation theory for the electromagnetic
current-current correlation function are examined. By suitably applying the
renormalization group, the coefficients of the asymptotic expansion in the deep
Euclidean region may be exp... | 1992-05-09 | 2009-10-22 | [
"hep-ph"
] | Lowell S. Brown, Laurence G. Yaffe, and Chengxing Zhai |
hep-ph/9205214 | Oscillations of Pseudo-Dirac Neutrinos and the Solar Neutrino Problem | The oscillations of pseudo-Dirac neutrinos in matter are discussed and
applied to the solar neutrino problem. Several scenarios such as both $\nu_e$
and $\nu_{\mu}$ being pseudo-Dirac and only $\nu_e$ or $\nu_{\mu}$ being
pseudo-Dirac are examined. It is shown that the allowed region in the
mass-mixing angle parameter ... | 1992-05-09 | 2009-10-22 | [
"hep-ph"
] | C. Giunti, C.W. Kim and U.W. Lee |
hep-ph/9205211 | Quark-Antiquark Regge Trajectories in Large N_c QCD | We apply methods developed by Lovelace, Lipatov and Kirschner to evaluate the
leading Regge trajectories \alpha(t) with the quantum numbers of nonexotic
quark-antiquark mesons at N_c = infinity and in the limit of t going to minus
infinity. In this region renormalization group improved perturbation theory
should be val... | 1992-05-08 | 2009-10-22 | [
"hep-ph"
] | Michael McGuigan and Charles B. Thorn |
hep-ph/9205208 | Late time Cosmological Phase Transition and Galactic Halo as Bose-liquid | We consider the ultra light pseudo Nambu-Goldstone boson appearing in the
late time cosmological phase transition theories as a dark matter candidate.
Since it is almost massless, its nature is more wave like than particle like.
Hence we apply quantum mechanics to study how they form the galactic halos.
Three predictio... | 1992-05-08 | 2010-11-30 | [
"hep-ph",
"astro-ph"
] | Sang-Jin Sin |
hep-ph/9205209 | Supersymmetric Signals in Electron-Photon Collision | Associated selectron-neutralino production in the process $e^-\gamma\to\tilde
e^-\tilde\chi^0$ provides a striking supersymmetric signal: events with a
single high $p_\perp$ electron and otherwise only invisible particles. For
$e^-\gamma$ collisions obtained at high energy linear colliders through
back-scattering of a ... | 1992-05-08 | 2009-10-22 | [
"hep-ph"
] | Frank Cuypers, Geert Jan van Oldenborgh and Reinhold R\"uckl |
hep-ph/9205212 | Grand Unification, Gravitational Waves, and the Cosmic Microwave
Background Anisotropy | We re-examine the gravitational wave background resulting from inflation and
its effect on the cosmic microwave background radiation. The new COBE
measurement of a cosmic background quadrupole anisotropy places an upper limit
on the vacuum energy during inflation of $\approx 5 \times 10^{16}$ GeV. A
stochastic backgrou... | 1992-05-08 | 2009-08-18 | [
"hep-ph"
] | L.M. Krauss and M. White |
hep-ph/9205210 | The Chiral Anomaly in Non-Leptonic Weak Interactions | The interplay between the chiral anomaly and the non-leptonic weak
Hamiltonian is studied. The structure of the corresponding effective Lagrangian
of odd intrinsic parity is established. It is shown that the factorizable
contributions (leading in $1/N_C$) to that Lagrangian can be calculated without
free parameters. As... | 1992-05-08 | 2009-10-22 | [
"hep-ph"
] | J. Bijnens, G. Ecker and A. Pich |
hep-ph/9205206 | R parity can spontaneously break | We refute the claims made by Chaichian and Smilga in a recent paper in Phys
Rev Letters on the impossibility of spontaneous R Parity breaking. Apart from
explaining their error we summarize the results of a more detailed work that
demonstrates explicitly that R parity can break spontaneously at a scale
anywhere in the ... | 1992-05-06 | 2007-05-23 | [
"hep-ph"
] | J C Romao, C A Santos, J W F Valle |
hep-ph/9205207 | Contributions to the W-Boson Anomalous Moments in the Two-Higgs-Doublet
Model at Collider Energies | We examine the one loop contributions arising in the Two-Higgs-Doublet Model
(THDM) to the W-boson anomalous magnetic dipole and electric quadrupole form
factors for both photon and Z couplings relevant at collider energies. While
the model parameter and $q^2$-dependencies of these form factors are found to
be signific... | 1992-05-06 | 2009-10-22 | [
"hep-ph"
] | T.G.Rizzo |
hep-ph/9205205 | Field Theory Without Feynman Diagrams: One-Loop Effective Actions | In this paper the connection between standard perturbation theory techniques
and the new Bern-Kosower calculational rules for gauge theory is clarified. For
one-loop effective actions of scalars, Dirac spinors, and vector bosons in a
background gauge field, Bern-Kosower-type rules are derived without the use of
either ... | 1992-05-05 | 2009-07-09 | [
"hep-ph"
] | Matthew J. Strassler |
hep-ph/9205204 | Vacuum Alignment in "Composite Technicolor" Models | We consider the question of vacuum alignment in the recently proposed
"composite technicolor" (CTC) models. In order for these models to work, an
"ultrafermion" condensate must align in a particular way, driven by the
competition between ultrafermion masses and "flavor" gauge boson exchange. We
show that for ultrafermi... | 1992-05-05 | 2009-10-22 | [
"hep-ph"
] | Markus A. Luty |
hep-ph/9205203 | A Realistic Technicolor Model from 150 TeV down | A realistic technicolor model is presented with the dynamics below $150$ TeV
treated explicitly. Electroweak symmetry is broken by the condensates of a
`minimal' doublet of technifermions. The new feature of the model is that the
the third generation quarks are unified with the technifermions into multiplets
of a walki... | 1992-05-05 | 2009-09-15 | [
"hep-ph"
] | Raman Sundrum |
hep-ph/9205201 | Production of the Lightest Supersymmetric Particle in Electron-Photon
Collisions | We present cross sections for the production of the lightest supersymmetric
particle as a neutralino state in the minimal supersymmetric standard model at
electron-photon colliders. The lightest supersymmetric particle mass is taken
at a value of 30 GeV which is slightly higher than its lowest experimental
bound of 20 ... | 1992-05-04 | 2009-10-22 | [
"hep-ph"
] | Heinz K\"onig and K. A. Peterson |
hep-ph/9205202 | Is CP a Gauge Symmetry? | We suggest here that CP is a discrete {\it gauge} symmetry, and is therefore
not violated by quantum gravity. We show that four dimensional CP can arise as
a discrete gauge symmetry in theories with dimensional compactification, if the
original number of Minkowski dimensions equals $8k+1$, $8k+2$ or $8k+3$, and if
ther... | 1992-05-04 | 2010-11-01 | [
"hep-ph"
] | Kiwoon Choi, David B. Kaplan, Ann E. Nelson |
hep-ph/9204239 | Virtual bremsstrahlung from pions and quarks in thermalized hadronic
matter | A soft photon approximation is used to calculate the rates of lepton pair
production through virtual bremsstrahlung from both pions and quarks. Standard
assumptions about the evolution of a nuclear system under collision allow pion
and quark driven total production to be calculated. Comparisons are made with
Dalitz dec... | 1992-04-30 | 2010-01-15 | [
"hep-ph"
] | K. Haglin, C. Gale and V. Emel'yanov |
hep-ph/9204238 | Semileptonic $B_c$ Decay and Heavy Quark Spin Symmetry | Semileptonic decay of the $B_c$ meson is studied in the heavy quark limit.
The six possible form factors for $B_c \rightarrow B_s (B^0),B_s^* (B^{*0})$
semileptonic decay are determined by two invariant functions. Only one of these
functions contributes at zero recoil, where it is calculable to lowest order in
an opera... | 1992-04-30 | 2016-09-01 | [
"hep-ph"
] | Elizabeth Jenkins, Michael Luke, Aneesh V. Manohar and Martin J.
Savage |
hep-ph/9204237 | Heavy Hadron Form Factor Relations for $m_c\ne\infty$ and
$\bas(m_c)\ne0$ | First order power corrections to current matrix elements between heavy meson
or $\Lambda_\Q$ baryon states are shown to vanish at the zero recoil point to
all orders in QCD. Five relations among the six form factors that parametrize
the semileptonic decay $\Lambda_b \to \Lambda_c e \overline{\nu}$ are also
demonstrated... | 1992-04-29 | 2010-11-01 | [
"hep-ph"
] | Peter Cho and Benjamin Grinstein |
hep-ph/9204236 | The Propagation of Quarks in the Spatial Direction in Hot QCD | The dynamics of {\it light} fermions propagating in a spatial direction at
high temperatures can be described effectively by a two--dimensional
Schr\"odinger equation with {\it heavy} effective mass $m_{\rm eff} = \pi T$.
Starting from QED, we discuss the transition from three-- to two--dimensional
positronium discussi... | 1992-04-29 | 2014-11-17 | [
"hep-ph"
] | V. Koch, E.V. Shuryak, G.E. Brown, and A. D. Jackson |
hep-ph/9204235 | Ginzburg-Landau Theory of the Electroweak Phase Transition and
Analytical Results | The phase transition of the electroweak vacuum induced by a strong magnetic
field is examined, and a connection is made with the Ginzburg-Landau theory of
type-II superconductivity. For solutions of the exact nonlinear field equations
of the electroweak theory with lattice periodicity in directions perpendicular
to the... | 1992-04-28 | 2007-05-23 | [
"hep-ph"
] | Ola Tornkvist |
hep-ph/9204234 | Threshold Effects in SO(10) Grandunified Models and Solar Neutrino
Puzzle | We compute the threshold uncertainties due to unknown masses of the Higgs
bosons on the predictions for the intermediate and unification scales, $M_I$
and $M_U$ respectively in SO(10) models.We focus on models with separate
breaking scales for Parity and $SU(2)_R$ symmetries since they provide a
natural realization of ... | 1992-04-27 | 2016-09-01 | [
"hep-ph"
] | R.N.Mohapatra and M.K.Parida (Univ. of Maryland) |
hep-ph/9204232 | New Tools for Analyzing Quark Mixing | We present some new mathematical tools which help to derive information about
the quark mass matrices directly from experimental data and to elucidate the
structure of these mass matrices. | 1992-04-24 | 2010-11-01 | [
"hep-ph"
] | Alexander Kusenko |
hep-ph/9204233 | CP-violating Phenomena in an $ SU(2)_L \times SU(2)_R \times U(1)_{B-L}
\times SU(3)_H^{VL}$ Horizontal Symmetric Model | We consider an $SU(2)_L \times SU(2)_R \times U(1)_{B-L} \times SU(3)_H^{VL}$
gauge model with natural flavour conservation in the Higgs sector, in which
CP-violation occurs due to the horizontal interactions only. We calculate the
CP-violating observables $\epsilon$ and $\epsilon'$ of the neutral kaon sector
and $d_n$... | 1992-04-23 | 2007-05-23 | [
"hep-ph"
] | D. Bhowmick, A. K. Ray, S. Raychaudhuri and S. Uma Sankar |
hep-ph/9204229 | The Residual Mass Term in the Heavy Quark Effective Theory | We reformulate the heavy quark effective theory in the presence of a residual
mass term, which has been taken to vanish in previous analyses. While such a
convention is permitted, the inclusion of a residual mass allows us to resolve
a potential ambiguity in the choice of the expansion parameter which defines
the effec... | 1992-04-23 | 2010-11-01 | [
"hep-ph"
] | Adam F. Falk, Matthias Neubert and Michael Luke |
hep-ph/9204228 | Phase Transition Temperatures at Next-to-Leading Order | Broken gauge symmetries are typically restored at high temperature, and the
leading-order result for the critical temperature $T_c$ was found many years
ago by Weinberg and by Dolan and Jackiw. I find a simple expression for the
next-to-leading order correction to $T_c$, which is order $e T_c$ where $e$ is
the gauge co... | 1992-04-23 | 2010-02-16 | [
"hep-ph"
] | Peter Arnold |
hep-ph/9204227 | Superconductivity Solves the Monopole Problem for Alice Strings | Alice strings are cosmic strings that turn matter into antimatter. Although
they arise naturally in many GUT's, it has long been believed that because of
the monopole problem they can have no cosmological effects. We show this
conclusion to be false; by using the Langacker-Pi mechanism, monopoles can in
fact be annihil... | 1992-04-23 | 2009-10-22 | [
"hep-ph"
] | Shahar Ben-Menahem and Adrian Cooper |
hep-ph/9204231 | Reaction rate in a heat bath | We show in detail how the presence of a heat bath of photons effectively
gives charged particles in the final state of a decay process a
temperature-dependent mass, and changes the effective strength of the force
responsible for the decay. At low temperature, gauge invariance causes both
these effects to be largely can... | 1992-04-23 | 2011-04-20 | [
"hep-ph"
] | M Jacob and P V Landshoff |
hep-ph/9204230 | Confinement in a Chromoelectric Vacuum | A chromoelectric vacuum that confines both gluon and quark degrees of freedom
(in the sense that they do not exist as asymptotic states) is constructed.
However some degrees of freedom still exist as asymptotic states thereby
allowing colour singlets to propagate. | 1992-04-22 | 2007-05-23 | [
"hep-ph"
] | Rahul Basu, Debajyoti Choudhury |
hep-ph/9204226 | Signals for Virtual Leptoquark Exchange at HERA | We study the effects of virtual leptoquarks on charged current and neutral
current processes at the $ep$ collider HERA. We present the areas of parameter
space that can be excluded at HERA by searching for deviations from Standard
Model expectations. The best results are obtained by examining the ratio of
neutral curre... | 1992-04-22 | 2009-10-22 | [
"hep-ph"
] | M. A. Doncheski and J. L. Hewett |
hep-ph/9204225 | Mass and mixing angle patterns in the Standard Model and its Minimal
Supersymmetric Extension | Using renormalization group techniques, we examine several interesting
relations among masses and mixing angles of quarks and leptons in the Standard
Model. We extend the analysis to the minimal supersymmetric extension to
determine its effect on these mass relations. Remarkably Supersymmetry allows
for these relations... | 1992-04-22 | 2009-10-22 | [
"hep-ph"
] | H. Arason, D.J. Castano, E.J. Piard, and P. Ramond |
hep-ph/9204224 | Proton $\beta% decay in large magnetic fields | A delicate interplay between the anomalous magnetic moments of the proton and
neutron makes, in magnetic fields $B\ge 2\times 10^{14}$ T, the neutron stable
and for fields $B\ge 5\times 10^{14}$ T the proton becomes unstable to a decay
into a neutron via $\beta$ emission. Limits on the field strengths for which
these a... | 1992-04-21 | 2009-10-22 | [
"hep-ph"
] | Myron Bander and H. R. Rubinstein |
hep-ph/9204223 | On tunneling at finite energies and temperatures | We study the contribution of finite energy tunneling to the total vacuum
transition rate in a system at finite temperature. We find that in certain
models, such as the 1+1 Abelian Higgs model, the quantum contribution is
non-negligible even at large temperatures. We show how the persistence of the
cosmological baryon a... | 1992-04-17 | 2009-10-22 | [
"hep-ph"
] | Stephen D.H. Hsu |
hep-ph/9204222 | Unusual high-pT jet events at HERA | We calculate the cross-section for events at HERA where the proton loses only
a minute fraction of its initial energy, all of which goes into producing a
single pair of transverse jets. | 1992-04-14 | 2009-10-22 | [
"hep-ph"
] | A Donnachie and P V Landshoff |
hep-ph/9204218 | On the Renormalization of the S Parameter | We calculate the S parameter of the standard model at one loop of fermions,
using three different regularizations (dimensional, Pauli-Villars and lattice)
and find an extra contribution to the S parameter besides the standard one for
each case. This shows that the extra contribution recently reported for the
lattice re... | 1992-04-13 | 2009-10-22 | [
"hep-ph"
] | Sinya Aoki |
hep-ph/9204220 | Colored Pseudo-Goldstone Bosons and Gauge Boson Pairs | If the electroweak symmetry breaking sector contains colored particles
weighing a few hundred GeV, then they will be copiously produced at a hadron
supercollider. Colored technipions can rescatter into pairs of gauge bosons. As
proposed by Bagger, Dawson, and Valencia, this leads to gauge boson pair rates
far larger th... | 1992-04-13 | 2019-06-05 | [
"hep-ph"
] | R. Sekhar Chivukula, Mitchell Golden, M. V. Ramana |
hep-ph/9204217 | Two--Body Decays of $B_s$ Mesons | We have calculated the decay rates of the $B_s$ meson in a number of
exclusive two--body decay channels using the Bauer--Stech--Wirbel model for
current matrix elements. The influence of the free parameters of the model on
the predictions is studied. The total branching ratio of the $B_s$ into final
states which only c... | 1992-04-13 | 2019-08-17 | [
"hep-ph"
] | J. Bijnens, F. Hoogeveen |
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