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/9209225 | Angular Diameters as a Probe of a Cosmological Constant and $\Omega$ | The lensing effect of curved space, which can cause the angular diameter of a
fixed reference length seen on the sky to reach a minimum and then increase
with redshift, depends sensitively on the value of the cosmological constant,
$\Lambda$, in a flat universe. The redshift of an observed minimum and the
asymptotic sl... | 1992-09-10 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | Lawrence M. Krauss and David Schramm |
hep-ph/9209224 | Grand Unification in Non-Commutative Geometry | The formalism of non-commutative geometry of A. Connes is used to construct
models in particle physics. The physical space-time is taken to be a product of
a continuous four-manifold by a discrete set of points. The treatment of Connes
is modified in such a way that the basic algebra is defined over the space of
matric... | 1992-09-10 | 2008-11-26 | [
"hep-ph",
"hep-th"
] | A. H. Chamseddine, G. Felder and J. Fr\"ohlich |
hep-ph/9209222 | Loops, Cutoffs and Anomalous Gauge Boson Couplings | We discuss several issues regarding analyses which use loop calculations to
put constraints on anomalous trilinear gauge boson couplings (TGC's). Many such
analyses give far too stringent bounds. This is independent of questions of
gauge invariance, contrary to the recent claims of de Rujula et. al., since the
lagrangi... | 1992-09-09 | 2009-10-22 | [
"hep-ph"
] | David London and C.P. Burgess |
hep-ph/9209223 | Z', new fermions and flavor changing processes, constraints on E$_6$
models from $\mu$ --> eee | We study a new class of flavor changing interactions, which can arise in
models based on extended gauge groups (rank $>$4) when new charged fermions are
present together with a new neutral gauge boson. We discuss the cases in which
the flavor changing couplings in the new neutral current coupled to the
$Z^\prime$ are t... | 1992-09-09 | 2009-10-22 | [
"hep-ph"
] | E. Nardi |
hep-ph/9209218 | A Quantitative Investigation of the Pomeron | A comparative investigation of various Pomeron models is carried out through
the study of their predicted values of $ \sigma_{tot}$, B, and
$\frac{\sigma_{el}}{\sigma_{tot}}$ in high energy pp and p$\bar{p}$ scattering.
Our results strongly support a picture of the Pomeron in which we have both
moderate blackening and ... | 1992-09-07 | 2009-10-22 | [
"hep-ph"
] | E. Gotsman, E.M. Levin and U. Maor |
hep-ph/9209219 | QCD and QED Corrections to Higgs Boson Production in Charged Current
$ep$ Scattering | First order QCD and leading QED corrections to Higgs boson production in the
channel $e^-p \to \nu H^0 X; H^0 \to b\bar{b}$ are calculated for the
kinematical conditions at LEP $\otimes$ LHC ($\sqrt{s} = 1360 \GeV$) and the
interesting mass range $80 < M_H < 150 \GeV$. In the DIS scheme the QCD
corrections (not includi... | 1992-09-07 | 2009-10-22 | [
"hep-ph"
] | J. Bl\"umlein, G. J. van Oldenborgh and R. R\"uckl |
hep-ph/9209220 | Proton Decay and Cosmology Strongly Constrain the Minimal SU(5)
Supergravity Model | We present the results of an extensive exploration of the five-dimensional
parameter space of the minimal $SU(5)$ supergravity model, including the
constraints of a long enough proton lifetime ($\tau_p>1\times10^{32}\y$) and a
small enough neutralino cosmological relic density ($\Omega_\chi h^2_0\le1$).
We find that th... | 1992-09-07 | 2011-06-08 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, and H. Pois |
hep-ph/9209221 | Possible Finiteness of the Higgs-Boson Mass Renormalization | It is shown by explicit calculation that the one-loop mass renormalization of
the Higgs boson in the standard model is gauge-independent. It could even be
rendered finite if the following mass relationships were satisfied: $m_t^2
\simeq m_H^2 = (2 M_W^2 + M_Z^2)/3$. Numerically, this would imply $m_t \simeq
84~GeV$ whi... | 1992-09-07 | 2009-10-22 | [
"hep-ph"
] | Ernest Ma |
hep-ph/9209217 | Vacuum Polarization and the Electric Charge of the Positron | We show that higher-order vacuum polarization would contribute a measureable
net charge to atoms, if the charges of electrons and positrons do not balance
precisely. We obtain the limit $|Q_e+Q_{\bar e}| < 10^{-18} e$ for the sum of
the charges of electron and positron. This also constitutes a new bound on
certain viol... | 1992-09-05 | 2008-11-26 | [
"hep-ph"
] | B. Mueller and M.H. Thoma |
hep-ph/9209212 | Dynamical Approach to Pair Production from Strong Fields | Lectures Given at the Nato Advanced Study Institute-Particle Production in
Highly Excited Matter Il Ciocco, Italy July 1992 figure available on request.
Input harvmac.tex | 1992-09-04 | 2007-05-23 | [
"hep-ph"
] | Fred Cooper |
hep-ph/9209215 | Predictive Neutrino Spectrum in Minimal $SO(10)$ Grand Unification | We show that minimal SO(10) Grand Unification models where the fermions have
Yukawa couplings to only one (complex) {\bf 10} and one {\bf 126} of Higgs
scalars lead to a very predictive neutrino spectrum. This comes about since the
standard model doublet contained in the {\bf 126} of Higgs (needed for the
see--saw mech... | 1992-09-04 | 2010-11-01 | [
"hep-ph"
] | K.S. Babu and R.N. Mohapatra |
hep-ph/9209214 | From Fermion Mass Matrices to Neutrino Oscillations | We present an ansatz for the quark and lepton mass matrices, derivable from
SO(10) type GUTs, which accommodates a heavy $(> 92 GeV)$ top quark and permits
large mixings in the $\nu_\mu \leftrightarrow \nu_\tau$ sector (as suggested by
the recent Kamiokande and IMB data on the atmospheric neutrinos). The well
known asy... | 1992-09-04 | 2009-10-22 | [
"hep-ph"
] | K.S. Babu and Q. Shafi |
hep-ph/9209213 | Next-to-next-to-leading order QCD analysis of the Gross-Llewellyn Smith
sum rule and the higher twist effects | We present the next-to-next-to-leading order QCD analysis of the
Gross-Llewellyn Smith (GLS) sum rule in deep inelastic lepton-nucleon
scattering, taking into account dimension-two, twist-four power correction. We
discuss in detail the renormalization scheme dependence of the perturbative QCD
approximations, propose a ... | 1992-09-04 | 2009-10-22 | [
"hep-ph"
] | J.Chyla and A.Kataev |
hep-ph/9209216 | A Comparison of the Use of Binary Decision Trees and Neural Networks in
Top Quark Detection | The use of neural networks for signal vs.~background discrimination in
high-energy physics experiment has been investigated and has compared favorably
with the efficiency of traditional kinematic cuts. Recent work in top quark
identification produced a neural network that, for a given top quark mass,
yielded a higher s... | 1992-09-04 | 2009-10-22 | [
"hep-ph"
] | David Bowser-Chao and Debra L. Dzialo |
hep-ph/9209208 | Discrete Gauge Symmetries in Axionic Extensions of the SSM | We examine discrete gauge symmetries in axionic extensions of the SSM which
provide a solution of the $\mu$-problem. Automatic-PQ symmetry and proton
stability are shown to be guaranteed by certain discrete symmetries. Focusing
on the L-violating discrete symmetries we discuss two sources of neutrino
masses and their r... | 1992-09-03 | 2009-10-22 | [
"hep-ph"
] | E. J. Chun and A. Lukas |
hep-ph/9209211 | Loop Calculations with Anomalous Gauge Boson Couplings | Analyses which use loop calculations to put constraints on anomalous
trilinear gauge boson couplings (TGC's) often give bounds which are much too
stringent. The reason has nothing to do with gauge invariance, in contrast to
the recent claims of de Rujula et. al., since the lagrangians used in these
calculations ARE gau... | 1992-09-03 | 2007-05-23 | [
"hep-ph"
] | David London and C.P. Burgess |
hep-ph/9209210 | Decay of Metastable Topological Defects | We systematically analyze the decay of metastable topological defects that
arise from the spontaneous breakdown of gauge or global symmetries.
Quantum-mechanical tunneling rates are estimated for a variety of decay
processes. The decay rate for a global string, vortex, domain wall, or kink is
typically suppressed compa... | 1992-09-03 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | John Preskill and Alexander Vilenkin |
hep-ph/9209209 | The Large Scale Structure of the Universe: Theory {\it vs.} Observations | Invited talk delivered at the International Conference on General Relativity
and Cosmology (ICGC), Ahmedabad, India; 13 - 18 December 1991. To appear in its
proceedings. | 1992-09-03 | 2008-02-03 | [
"hep-ph"
] | Varun Sahni |
hep-ph/9209206 | 17 keV neutrino and large magnetic moment solution of the solar neutrino
puzzle | Zee-type models with Majorons naturally incorporate the 17 keV neutrino but
in their minimal version fail to simultaneously solve the solar neutrino
puzzle. If there is a sterile neutrino state, we find a particularly simple
solution to the solar neutrino problem, which besides $\nu_{17}$ predicts a
light Zeldovich-Kon... | 1992-09-02 | 2008-11-26 | [
"hep-ph"
] | Eugeni Akhmedov, Zurab Berezhiani, Goran Senjanovic and Zhijian Tao |
hep-ph/9209207 | The Production of $Z'$ Associated With Photons or Jets as a Probe of New
Gauge Boson Couplings | We examine the production of a new $Z'$ gauge boson in association with
photons or jets at future hadron supercolliders as a probe of its couplings to
fermions. Associated jet production is found to be rather insensitive to these
couplings and suffers from large uncertainties as well as substantial
backgrounds. On the ... | 1992-09-02 | 2009-10-22 | [
"hep-ph"
] | Thomas G. Rizzo |
hep-ph/9209205 | Total cross sections | Regge theory provides a very simple and economical description of all total
cross sections | 1992-09-02 | 2009-10-22 | [
"hep-ph"
] | A Donnachie and P V Landshoff |
hep-ph/9209202 | Compact Lattice QED and the Coulomb Potential | The potential energy of a static charge distribution on a lattice is
rigorously computed in the standard compact quantum electrodynamic model. The
method used follows closely that of Weyl for ordinary quantum electrodynamics
in continuous space-time. The potential energy of the static charge
distribution is independent... | 1992-09-01 | 2009-10-22 | [
"hep-ph"
] | Y.N. Srivstava, A. Widom, M.H. Friedman, O.Panella |
hep-ph/9209201 | Minimal Supersymmetric Standard Model Extended by One Additional Higgs
Singlet and its Influence on the Anomalous Magnetic Moment of the Muon | We present the results of the influence of the minimal supersymmetric
standard model extended by an additional
Higgs singlet N, with vacuum expectation value $v_N$, on the anomalous
magnetic moment of the muon.
This gives different mass matrices for the charginos and neutralinos, which
are taken into account within... | 1992-09-01 | 2007-05-23 | [
"hep-ph"
] | Heinz K\"onig |
hep-ph/9209204 | Electromagnetic Polarisability of the Nucleon in Chiral Perturbation
Theory | We compute the polarisability of the nucleon to leading order in chiral
perturbation theory. The contributions from kaons and baryon resonances as
intermediate states are included in addition to the contribution from pions and
nucleons that had been previously computed. The isoscalar operators are
dominated by the infr... | 1992-09-01 | 2009-10-22 | [
"hep-ph"
] | Malcolm N. Butler and Martin J. Savage |
hep-ph/9209203 | Summing tree graphs at threshold | The solution of the classical field equation generates the sum of all tree
graphs. We show that the classical equation reduces to an easily solved
ordinary differential equation for certain multiparticle threshold amplitudes
and compute these amplitudes. | 1992-09-01 | 2009-12-30 | [
"hep-ph"
] | Lowell S. Brown |
hep-ph/9208262 | New Neutrino Physics Without Fine Tuning | We show how a 17 keV neutrino, the solar neutrino problem, and the
atmospheric muon-neutrino deficit could all be the low-energy residues of the
same pattern of lepton-number breaking at and above the weak scale, with no
requirement for fine-tuning a symmetry-breaking scale at lower energies. Talk
given at ``Beyond the... | 1992-08-31 | 2007-05-23 | [
"hep-ph"
] | C.P. Burgess, James M. Cline and Markus Luty |
hep-ph/9208261 | Bilocal Field Approach and Semileptonic Heavy Meson Decays | In this paper we consider the bilocal field approach for $QCD$. We obtain a
bilocal effective meson action with a potential kernel given in relativistic
covariant form. The corresponding Schwinger--Dyson and Bethe--Salpeter
equations are investigated in detail. By introducing weak interactions into the
theory we study ... | 1992-08-31 | 2007-05-23 | [
"hep-ph"
] | Yu. L. Kalinovsky, L. Kaschluhn |
hep-ph/9208260 | Bounds on mini-charged neutrinos in the minimal standard model | In the minimal Standard Model (MSM) with three generations of quarks and
leptons, neutrinos can have tiny charges consistent with electromagnetic gauge
invariance. There are three types of non-standard electric charge, given by
$Q_{st} + \epsilon(L_i - L_j)$, where $i, j = e, \mu, \tau$ $(i \neq j)$,
$Q_{st}$ is standa... | 1992-08-31 | 2009-12-30 | [
"hep-ph"
] | K. S. Babu and R. R. Volkas |
hep-ph/9208258 | Parton-Hadron duality in event generators | The validity of local parton-hadron duality within the framework of HERWIG
and JETSET event generators is investigated. We concentrate on ${\rm e}^{+}{\rm
e}^{-}$ annihilations in LEP 2 energy range as these interactions provide
theoretically the cleanest condition for the discussion of this concept. | 1992-08-28 | 2009-10-22 | [
"hep-ph"
] | J.Chyla and J.Rames |
hep-ph/9208259 | Extended Technicolor Corrections to the $Z b\bar b$ Vertex | Extended technicolor theories generate potentially large corrections to the
$\Zbb$ vertex. These can be observed in current experiments at LEP. | 1992-08-28 | 2007-05-23 | [
"hep-ph"
] | E.H. Simmons, R.S. Chivukula and S.B. Selipsky |
hep-ph/9208256 | Response of nucleons to external probes in hedgehog models: I.
Electromagnetic polarizabilities | Electromagnetic polarizabilities of the nucleon are analyzed in a hedgehog
model with quark and meson degrees of freedom. | 1992-08-27 | 2010-11-01 | [
"hep-ph"
] | W. Broniowski and T. D. Cohen |
hep-ph/9208257 | Response of nucleons to external probes in hedgehog models: II. General
formalism | Linear response theory for SU(2) hedgehog soliton models is developed. | 1992-08-27 | 2009-10-22 | [
"hep-ph"
] | W. Broniowski and T. D. Cohen |
hep-ph/9208255 | Searching for TeV dark matter by atmospheric Cerenkov techniques | There is a growing interest in the possibility that dark matter could be
formed of weakly interacting particles with a mass in the 100 GeV - 2 TeV
range, and supersymmetric particles are favorite candidates. If they constitute
the dark halo of our Galaxy, their mutual annihilations produce energetic gamma
rays that cou... | 1992-08-27 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | M. Urban, A. Bouquet, B. Degrange, P. Fleury, J. Kaplan, A.L.Melchior
and E. Par\'e |
hep-ph/9208252 | The structure of the pion and effective electroweak currents in soliton
models of the nucleon | Nonminimal substitution terms in electroweak currents are studied in
effective chiral soliton models. It is found that the terms describing the
structure of the pion lead to sizable effects in form factors and
polarizabilities of the nucleon. | 1992-08-26 | 2011-07-19 | [
"hep-ph"
] | W. Broniowski and T. D. Cohen |
hep-ph/9208248 | The Baryon Isgur-Wise Function in the Large $N_c$ Limit | In the large $N_c$ limit, the $\Lambda_b$ and $\Lambda_c$ can be treated as
bound states of chiral solitons and mesons containing a heavy quark. We show
that the soliton and heavy meson are bound in an attractive harmonic oscillator
potential. The Isgur-Wise function for $\Lambda_b\rightarrow\Lambda_c\,
e^-\,\bar\nu_e$... | 1992-08-26 | 2008-11-26 | [
"hep-ph"
] | Elizabeth Jenkins, Aneesh V. Manohar, and Mark B. Wise |
hep-ph/9208251 | Coannihilation Effects and Relic Abundance of Higgsino-Dominant LSPs | We calculate the relic abundance of Higgsino-dominant lightest
superparticles, taking account of coannihilations with the superparticles which
are almost degenerate with the lightest one. We show that their relic abundance
is reduced drastically by the coannihilation processes and hence they are
cosmologically of no in... | 1992-08-26 | 2008-11-26 | [
"hep-ph"
] | Satoshi Mizuta and Masahiro Yamaguchi |
hep-ph/9208253 | The role of the Delta isobar in chiral perturbation theory and hedgehog
soliton models | Hedgehog model predictions for the leading nonanalytic behavior (in
$m^{2}_{\pi }$) of certain observables are shown to agree with the predictions
of chiral perturbation theory up to an overall factor which depends on the
operator. This factor can be understood in terms of contributions of the
$\Delta$ isobar in chiral... | 1992-08-26 | 2009-10-22 | [
"hep-ph"
] | Thomas D. Cohen and Wojciech Broniowski |
hep-ph/9208249 | Large Jets at Hadron Colliders at Order $\alpha_s^3$: A Look Inside | Results from the study of hadronic jets in hadron-hadron collisions at order
$\alpha_s^3$ in perturbation theory are presented. The focus is on various
features of the internal structure of jets. The numerical results of the
calculation are compared with data where possible and exhibit reasonable
agreement. | 1992-08-26 | 2009-10-22 | [
"hep-ph"
] | Stephen D. Ellis, Zoltan Kunszt and Davison E. Soper |
hep-ph/9208250 | Spin-Spin Asymmetries in Large Transverse Momentum Higgs Boson
Production | We examine the spin-dependence of standard model Higgs boson production at
large transverse momentum via the processes $gg \rightarrow gH^0$, $qg
\rightarrow qH^0$, and $q\overline{q} \rightarrow gH^0$. The partonic level
spin-spin asymmetries ($\hat{a}_{LL}$) for these processes are large at SSC/LHC
energies. | 1992-08-26 | 2016-09-01 | [
"hep-ph"
] | M. A. Doncheski, R. W. Robinett and L. Weinkauf |
hep-ph/9208254 | P-Wave Charmonium Production in B-Meson Decays | We calculate the decay rates of $B$ mesons into P-wave charmonium states
using new factorization formulas that are valid to leading order in the
relative velocity of the charmed quark and antiquark and to all orders in the
running coupling constant of QCD. We express the production rates for all four
P states in terms ... | 1992-08-26 | 2009-12-30 | [
"hep-ph"
] | Geoffrey T. Bodwin, Eric Braaten, Tzu Chiang Yuan, G. Peter Lepage |
hep-ph/9208245 | Metastable Cosmic Strings in Realistic Models | We investigate the stability of the electroweak Z-string at high
temperatures. Our results show that while finite temperature corrections can
improve the stability of the Z-string, their effect is not strong enough to
stabilize the Z-string in the standard electroweak model. Consequently, the
Z-string will be unstable ... | 1992-08-25 | 2011-07-19 | [
"hep-ph"
] | R. Holman, S.D.H. Hsu, T. Vachaspati and R. Watkins |
hep-ph/9208246 | Gravitationally Induced Scalar Field Fluctuations in the Radiation
Dominated R-W Universe | It is shown that quantum fluctuations due to a nontrivial gravitational
background in the flat radiation dominated universe can play an important
cosmological role generating nonvanishing cosmological global charge, e.g.
baryon number, asymmetry. The explicit form of the fluctuations at vacuum and
at finite temperature... | 1992-08-25 | 2007-05-23 | [
"hep-ph"
] | Zygmunt Lalak, Krzysztof Meissner, Jacek Pawe{\l}czyk |
hep-ph/9208247 | COBE vs Cosmic Strings: An Analytical Model | We construct a simple analytical model to study the effects of cosmic strings
on the microwave background radiation. Our model is based on counting random
multiple impulses inflicted on photon trajectories by the string network
between the time of recombination and today. We construct the temperature
auto-correlation f... | 1992-08-25 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | Leandros Perivolaropoulos |
hep-ph/9208244 | Heavy Hadron Chiral Perturbation Theory | The formalism and applications of chiral perturbation theory for hadrons
containing a single heavy quark are discussed. We emphasize the utility of
working directly with the velocity dependent ``super'' fields which appear in
the chiral Lagrangian and whose interactions manifestly preserve heavy quark
spin symmetry rat... | 1992-08-24 | 2011-07-19 | [
"hep-ph"
] | Peter Cho |
hep-ph/9208243 | Neutrino masses and mixings in a predictive theory of fermion masses | A framework for predicting charged fermion masses in supersymmetric grand
unified theories is extended to make predictions in the neutrino sector. Eight
new predictions are made, and their relevance to neutrino oscillation
experiments and the solar neutrino problem are discussed. | 1992-08-24 | 2009-10-22 | [
"hep-ph"
] | S. Dimopoulos, L. J. Hall and S. Raby |
hep-ph/9208242 | Composite Vector Leptoquarks in $e^+ e^-$, $\gamma e$, and
$\gamma\gamma$ Colliders | We study the signals for composite vector leptoquarks in $e^+ e^-$ colliders
(LEP II, NLC, and CLIC) through their effects on the production of jet pairs,
as well as their single and pair productions. We also analyze their production
in $\gamma e$ and $\gamma\gamma$ collisions. | 1992-08-24 | 2009-10-22 | [
"hep-ph"
] | J.E. Cieza Montalvo and O.J.P. Eboli |
hep-ph/9208237 | Renormalization Group Coefficients for the Un-Truncated Derivative
Expansion in Effective Field Theory | We investigate the renormalization of ``nonlocal" interactions which arise as
an infinite sum of higher derivative interactions in an effective field theory.
Using dimensional regularization with minimal subtraction in a general scalar
field theory, we write an integro-differential renormalization group equation
for th... | 1992-08-21 | 2009-10-22 | [
"hep-ph"
] | Vineer Bhansali (Harvard University) |
hep-ph/9208236 | The Generational Seesaw Mechanism in [SU(6)]$^{3}\times$Z$_{3}$} | In the context of the left-right symmetric gauge group [SU(6)]$^3\times$
Z$_3$ which unifies nongravitational forces with flavors, we analyze the
generational seesaw mechanism. At tree level we get
m$_{\nu_\tau}\sim$m$_{\nu_\mu}\sim$M$^2_L$/M$_H$, m$_{\nu_e}=0$, where
M$_L\sim10^2$ GeVs and M$_H\ge 100$ TeVs is the mas... | 1992-08-21 | 2009-08-26 | [
"hep-ph"
] | William A. Ponce, Arnulfo Zepeda and Ricardo Gaitan Lozano |
hep-ph/9208238 | Hyperfine Splittings of Baryons Containing a Heavy Quark in the Skyrme
Model | The $\Sigma_c^*-\Sigma_c$ and $\Sigma_b^*-\Sigma_b$ hyperfine mass splittings
are computed in the Skyrme model. The hyperfine splittings are suppressed by
both $1/N_c$ and by $1/m_Q$, where $N_c$ is the number of colors and $m_Q$ is
the mass of the heavy quark. The $\Sigma_c$, $\Sigma_c^*$, $\Sigma_b$,
$\Sigma_b^*$, an... | 1992-08-21 | 2008-11-26 | [
"hep-ph"
] | Elizabeth Jenkins and Aneesh V. Manohar |
hep-ph/9208239 | Large- and Small-Scale Constraints on Power Spectra in $\Omega=1$
Universes | The cold dark matter (CDM) model of structure formation, normalized on large
scales, leads to excessive pairwise velocity dispersions on small scales. In an
attempt to circumvent this problem, we study three scenarios (all with
$\Omega=1$) which have more large-scale power and less small-scale power than
the CDM model:... | 1992-08-21 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | James. M. Gelb, Ben-Ami Gradwohl, and Joshua A. Frieman |
hep-ph/9208240 | On the QCD corrections to the charged Higgs decay of a heavy quark | Using dimensional regularization for both infrared and ultraviolet
divergences, we confirm that the QCD corrections to the decay width
$\Gamma(t\to H^+b)$ are equal to those to $\Gamma(t\to W^+b)$ in the limit of a
large $t$ quark mass. | 1992-08-21 | 2009-10-22 | [
"hep-ph"
] | Andrzej Czarnecki and Sacha Davidson |
hep-ph/9208235 | E6 GUT and Large Neutrino Mixing | All experimental results concerning possible neutrino oscillations are
naturally and simultaneously accounted for in an $E_6$ GUT model. The fermionic
mass matrices are dictated by the symmetry breaking and specific radiative
corrections and not by the use of ``Ans\"atze'' or discrete symmetries. | 1992-08-20 | 2009-10-22 | [
"hep-ph"
] | Y. Achiman and A. Lukas |
hep-ph/9208234 | On the Infrared Behavior of the Pressure in Thermal Field Theories | We study non-perturbatively, via the Schwinger-Dyson equations, the leading
infrared behavior of the pressure in the ladder approximation. This problem is
discussed firstly in the context of a thermal scalar field theory, and the
analysis is then extended to the Yang-Mills theory at high temperatures. Using
the Feynman... | 1992-08-19 | 2013-11-13 | [
"hep-ph",
"hep-th"
] | A. P. de Almeida and J. Frenkel |
hep-ph/9208231 | Critical Behavior in the Electroweak Phase Transition | We examine the behavior of the standard-model electroweak phase transition in
the early Universe. We argue that close to the critical temperature it is
possible to estimate the {\it effective} infrared corrections to the 1-loop
potential using well known $\varepsilon$-expansion results from the theory of
critical pheno... | 1992-08-19 | 2009-10-22 | [
"hep-ph",
"astro-ph",
"gr-qc"
] | Marcelo Gleiser and Edward W. Kolb |
hep-ph/9208233 | The Cosmological Kibble Mechanism in the Laboratory: String Formation in
Liquid Crystals | We have observed the production of strings (disclination lines and loops) via
the Kibble mechanism of domain (bubble) formation in the isotropic to nematic
phase transition of a sample of uniaxial nematic liquid crystal. The probablity
of string formation per bubble is measured to be $0.33 \pm 0.01$. This is in
good ag... | 1992-08-19 | 2011-07-19 | [
"hep-ph",
"cond-mat",
"hep-th"
] | M.J. Bowick, L. Chandar, E.A. Schiff, and A.M. Srivastava |
hep-ph/9208232 | Effects of Collective Potentials on Pion Spectra in Relativistic Heavy
Ion Collisions | The effect of collective potentials on pion spectra in ultrarelativistic
heavy ion collisions is investigated. We find the effect of these potential to
be very small, too small to explain the observed enhancement at low transverse
momenta. (7 figures, bill be send on request) | 1992-08-19 | 2009-10-22 | [
"hep-ph"
] | Volker Koch and George Bertsch |
hep-ph/9208230 | Planck scale effects in neutrino physics | We study the phenomenology and cosmology of the Majoron (flavon) models of
three active and one inert neutrino paying special attention to the possible
(almost) conserved generalization of the Zeldovich-Konopinski-Mahmoud lepton
charge. Using Planck scale physics effects which provide the breaking of the
lepton charge,... | 1992-08-18 | 2008-11-26 | [
"hep-ph"
] | Eugeni Akhmedov, Zurab Berezhiani Goran Senjanovic and Zhijian Tao |
hep-ph/9208228 | Prospect of Heavy Right-Handed Neutrino Search at SSC/LHC Energies | Right-handed neutrinos with large Majorana mass occur naturally in the
left-right symmetric model. We explore the prospect of such heavy Right-handed
Neutrino search Via $W_R$ decay in the Like Sign Dilepton channel at SSC/LHC.
The standard model background can be effectively eliminated by suitable lepton
$p_T$ and iso... | 1992-08-17 | 2008-11-26 | [
"hep-ph"
] | Amitava Dattta, Manoranjan Guchait and D.P. Roy |
hep-ph/9208229 | Decay of the Z Boson into Scalar Particles | In extensions of the standard model, light scalar particles are often
possible because of symmetry considerations. We study the decay of the Z boson
into such particles. In particular, we consider for illustration the scalar
sector of a recently proposed model of the 17-keV neutrino which satisfies all
laboratory, astr... | 1992-08-17 | 2009-10-22 | [
"hep-ph"
] | T. V. Duong and Ernest Ma |
hep-ph/9208227 | Two Stage Phase Transition in Two Higgs Models | We present a mechanism in which models with two Higgs fields can undergo a
two stage phase transition as the temperature falls. The first stage is a
conventional second order (or weakly first order) transition in which the
symmetry is broken. Shortly thereafter follows a first order transition with
barrier penetration,... | 1992-08-14 | 2010-11-01 | [
"hep-ph"
] | David Land and Eric Carlson |
hep-ph/9208226 | Higgs boson bounds in non-minimal supersymmetric standard models | In the minimal supersymmetric standard model (MSSM), when radiative
corrections are included, the mass of the $CP=+1$ lightest Higgs boson is
bounded by $\sim 110\ GeV$ for $m_t < 150\ GeV$ and a scale of supersymmetry
breaking $\sim\ 1\ TeV$. In non-minimal supersymmetric standard models (NMSSM)
upper bounds on the ma... | 1992-08-14 | 2009-10-22 | [
"hep-ph"
] | J. R. Espinosa and M. Quir\'os |
hep-ph/9208225 | Two- and Three Vector Boson Production in e+ e- Collisions within the
BESS Model | The BESS model is the Higgsless alternative to the standard model of
electroweak interaction with nonlinear realized spontaneous symmetry breaking.
Since it is non-renormalizable new couplings (not existing in the SM) are
induced at each loop order. On the basis of the one loop induced gauge boson
self-couplings we cal... | 1992-08-13 | 2015-06-25 | [
"hep-ph"
] | G. Cveti\v{c} (Santa Maria Univ., Valparaiso, Chile), C.
Grosse-Knetter and R. K\"ogerler (Fakult\"at f\"ur Physik, Universit\"at
Bielefeld, Bielefeld, Germany) |
hep-ph/9208224 | Calculating the Critical Temperature for Coleman-Weinberg GUTs | We study the finite temperature effective potential of the Higgs scalar in
GUTs with Coleman-Weinberg symmetry breaking. The critical temperature is
derived without employing a high temperature approximation to the effective
potential, and the limitations of such approximations are discussed. | 1992-08-12 | 2009-10-22 | [
"hep-ph"
] | Richard Easther and William Moreau |
hep-ph/9208223 | Neutrino Helioseismology | The observed deficit of $\rm ^8B$ solar neutrinos may call for an improved
standard model of the sun or an expanded standard model of particle physics
({\it e.g.,} with neutrino masses and mixing). In the former case, contemporary
fluid motions and thermal fluctuations in the sun's core may modify nuclear
reaction rate... | 1992-08-11 | 2007-05-23 | [
"hep-ph"
] | A. De R\'ujula and S.L. Glashow |
hep-ph/9208219 | Quantum effects near a point mass in 2+1 dimensional gravity | We investigate the behaviour of classical and quantum fields in the conical
space-time associated with a point mass in 2+1 dimensions. We show that the
presence of conical boundary conditions alters the electrostatic field of a
point charge leading to the presence of a finite self-force on the charge from
the direction... | 1992-08-11 | 2010-11-01 | [
"hep-ph",
"gr-qc"
] | Tarun Souradeep and Varun Sahni |
hep-ph/9208218 | On the Stability of Electroweak Strings (New Version) | We map the parameter space that leads to stable Z-vortices in the electroweak
model. For $sin^2 \theta_W = 0.23$, we find that the strings are unstable for a
Higgs mass larger than 24 GeV. Given the latest constraints on the Higgs mass
from LEP, this shows that, if the standard electroweak model is realized in
Nature, ... | 1992-08-11 | 2007-05-23 | [
"hep-ph"
] | M. James, L. Perivolaropoulos and T. Vachaspati |
hep-ph/9208222 | Quaternions and the heuristic role of mathematical structures in physics | One of the important ways development takes place in mathematics is via a
process of generalization. On the basis of a recent characterization of this
process we propose a principle that generalizations of mathematical structures
that are already part of successful physical theories serve as good guides for
the develop... | 1992-08-11 | 2008-02-03 | [
"hep-ph"
] | Ronald Anderson and Girish C. Joshi |
hep-ph/9208220 | Study of gamma gamma -> W_L W_L and gamma gamma -> Z_L Z_L reactions
with Chiral Lagrangians | We analyze the effects of a strongly interacting symmetry breaking sector of
the Standard Model in $\gamma \gamma -> W_L^+ W_L^-$ and $\gamma \gamma -> Z_L
Z_L$ reactions at TeV energies by using Chiral Lagrangians and Chiral
Perturbation Theory. We find significant deviations from the Standard Model
predictions for th... | 1992-08-11 | 2009-10-22 | [
"hep-ph"
] | Maria Herrero and Ester Ruiz-Morales |
hep-ph/9208221 | Properties of Baryons Containing a Heavy Quark in the Skyrme Model | The properties of baryons containing one heavy quark are studied in the
Skyrme model, where they are treated as bound states of a heavy meson with an
$SU(2)$ chiral soliton. In the large $N_c$ limit, the baryon spectrum is an
infinite tower of degenerate states with isospin and spin of the light degrees
of freedom $I=s... | 1992-08-11 | 2009-10-22 | [
"hep-ph"
] | Zachary Guralnik, Michael Luke and Aneesh V. Manohar |
hep-ph/9208217 | Density Perturbations,Gravity Waves and the Cosmic Microwave Background | We asses the contribution to the observed large scale anisotropy of the
cosmic microwave background radiation, arising from both gravity waves as well
as adiabatic density perturbations, generated by a common inflationary
mechanism in the early Universe.
We find that for inflationary models predicting power law primo... | 1992-08-10 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | Tarun Souradeep and Varun Sahni |
hep-ph/9208216 | Multiple photon effects in $pp$ scattering at SSC energies | The Monte Carlo program SSCYFS2 is used in conjunction with available parton
distribution functions to calculate the effects of multiple photon radiation on
pp scattering at SSC energies. Effects relevant to precision SSC physics such
as Higgs discovery and exploration are illustrated. | 1992-08-10 | 2009-10-22 | [
"hep-ph"
] | D. B. DeLaney, S. Jadach, C. Shio, G. Siopsis, and B. F. L. Ward |
hep-ph/9208215 | On the Possibility of Second-Order Phase Transitions in Spontaneously
Broken Gauge Theories | In the ``Type-II'' regime, $m_{\rm Higgs}\gap m_{\rm gauge}$, the
finite-temperature phase transition in spontaneously-broken gauge theories
(including the standard model) must be be studied using a renormalization group
treatment. Previous studies within the $(4-\ep)$-expansion suggest a 1st-order
transition in this r... | 1992-08-08 | 2009-10-22 | [
"hep-ph",
"hep-lat",
"hep-th"
] | John March-Russell |
hep-ph/9208214 | The gravitational wave contribution to CMB anisotropies and the
amplitude of mass fluctuations from COBE results | A stochastic background of primordial gravitational waves may substantially
contribute, via the Sachs--Wolfe effect, to the large--scale Cosmic Microwave
Background (CMB) anisotropies recently detected by COBE. This implies a {\it
bias} in any resulting determination of the primordial amplitude of density
fluctuations.... | 1992-08-07 | 2011-07-19 | [
"hep-ph"
] | F. Lucchin, S. Matarrese and S. Mollerach |
hep-ph/9208212 | Black Holes from Nucleating Strings | We evaluate the probability that a loop of string that has spontaneously
nucleated during inflation will form a black hole upon collapse, after the end
of inflation. We then use the observational bounds on the density of primordial
black holes to put constraints on the parameters of the model. Other
constraints from th... | 1992-08-06 | 2009-10-22 | [
"hep-ph",
"gr-qc",
"hep-th"
] | Jaume Garriga and Alexander Vilenkin |
hep-ph/9208213 | Fragmentation of Transversely Polarized Quarks Probed in Transverse
Momentum Distributions | It is shown that the azimuthal dependence of the distribution of hadrons in a
quark jet is a probe of the transverse spin of the quark initiating the jet.
This results in a new spin-dependent fragmentation function that acts at the
twist-2 level. One example of a process where it contributes is semi-inclusive
deeply in... | 1992-08-06 | 2009-10-22 | [
"hep-ph"
] | John Collins |
hep-ph/9208211 | Soft dilepton production in relativistic heavy ion collisions | Production of electron-positron pairs with invariant masses less than 300 MeV
from thermalized hadronic matter in relativistic heavy ion collisions is
calculated using a soft virtual photon approximation. The general theoretical
framework is reviewed and extended to include arbitrarily massed and charged
reaction partn... | 1992-08-06 | 2010-01-15 | [
"hep-ph"
] | K. Haglin, C.Gale and V. Emel'yanov |
hep-ph/9208210 | Gauge Model of Generation Nonuniversality Reexamined | A gauge model of generation nonuniversality proposed in 1981 is reexamined in
the light of present precision electroweak measurements. Two necessary features
of this model are that the tau lifetime should be longer than predicted by the
standard model and that the rho parameter measured at the Z peak should have an
add... | 1992-08-05 | 2009-10-22 | [
"hep-ph"
] | Xiaoyuan Li and Ernest Ma |
hep-ph/9208209 | Breakdown of Dimensional Regularization in the Sudakov Problem | An explicit example is presented (a one-loop triangle graph) where
dimensional regularization fails to regulate the infra-red singularities that
emerge at intermediate steps of studying large-$Q^2$ Sudakov factorization. The
mathematical nature of the phenomenon is explained within the framework of the
theory of the $A... | 1992-08-05 | 2009-10-22 | [
"hep-ph"
] | J.C. Collins and F.V. Tkachov |
hep-ph/9208208 | Can Polarised Drell-Yan Shed More Light On The Proton Spin? | We analyse polarised Drell-Yan process using the factorisation method and
derive operator definitions for polarised parton distribution functions. We
demonstrate that a factorisation analogous to that in the unpolarised Drell-Yan
case holds in this process. We study the leading order gluonic contribution to
the first m... | 1992-08-05 | 2015-06-25 | [
"hep-ph"
] | Prakash Mathews and V. Ravindran |
hep-ph/9208206 | Photon production through $A_1$ resonance in high energy heavy ion
collisions | Electromagnetic radiation from excited hadronic matter is one of the best
ways to study the properties of the matter.
Considering various processes in the hadronic gas, Kapusta et al
\cite{Kapusta_photons} have found a $\pi\rho \rightarrow \pi\gamma$ reaction
with intermediate virtual pion or rho to be the main sourc... | 1992-08-04 | 2010-11-01 | [
"hep-ph"
] | L. Xiong, E. Shuryak and G. E. Brown |
hep-ph/9208205 | Spontaneous CP violation in Supersymmetric theories | We study the minimal version of the supersymmetric standard model with
spontaneous CP breaking. In this model, the KM matrix is real and contributions
to $\varepsilon$ arise from box diagrams involving squarks. We analyze the
region of the parameter space which corresponds to values for $\varepsilon$,
$\varepsilon^\pri... | 1992-08-04 | 2010-11-01 | [
"hep-ph"
] | Alex Pomarol |
hep-ph/9208207 | Radiative Rare B Decays into Higher K-Resonances | We estimate the contributions of higher K-resonances to the radiative rare
decays b -> s gamma. We use the spin symmetry for heavy quarks to reduce the
number of independent form factors to four Isgur-Wise functions, which are
estimated from the wave function model of Isgur, Scora, Grinstein, and Wise.
Our results sugg... | 1992-08-04 | 2009-10-22 | [
"hep-ph"
] | Ahmed Ali, Thomas Mannel, and Thorsten Ohl |
hep-ph/9208202 | Instability and Subsequent Evolution of Electroweak Bubbles | Bubbles in a first-order electroweak phase transition are nucleated with
radii $R_0$ and expand with velocity $v$. If $v$ is subsonic, a bubble becomes
unstable to non-spherical perturbations when its radius is roughly $10^4\,
R_0$. These perturbations accelerate the transition, and the effective velocity
of bubble gro... | 1992-08-04 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | Marc Kamionkowski and Katherine Freese |
hep-ph/9208203 | Topological phase due to electric dipole moment and magnetic monopole
interaction | We show that there is an anologous Aharonov-Casher effect on a neutral
particle with electric dipole moment interacting with a magnetic filed produced
by magnetic monopoles. | 1992-08-04 | 2009-10-22 | [
"hep-ph"
] | Xiao-Gang He and B.H.J. McKellar |
hep-ph/9208204 | Semileptonic Kaon Decays in Chiral Perturbation Theory | We present the matrix elements for the semileptonic kaon decays
$K_{l2\gamma}$, $K_{l2l^+l^-}$, $K_{l2l'^+l'^-}$, $K_{l3}$, $K_{l3\gamma}$ and
$K_{l4}$ at next-to-leading order in chiral perturbation theory and compare the
predictions with experimental data. Monte Carlo event generators are used to
calculate the corres... | 1992-08-04 | 2007-05-23 | [
"hep-ph"
] | J. Bijnens, G. Ecker and J. Gasser |
hep-ph/9208201 | Current correlators to all orders in the quark masses | The contributions to the coefficient functions of the quark and the mixed
quark-gluon condensate to mesonic correlators are calculated for the first time
to all orders in the quark masses, and to lowest order in the strong coupling
constant. Existing results on the coefficient functions of the unit operator
and the glu... | 1992-08-03 | 2009-10-22 | [
"hep-ph"
] | M. Jamin, M. Muenz |
hep-ph/9207279 | Nucleon Decay in the Minimal Supersymmetric $SU(5)$ Grand Unification | We make a detailed analysis on the nucleon decay in the minimal
supersymmetric $SU(5)$ grand unified model. We find that a requirement of the
unification of three gauge coupling constants leads to a constraint on a mass
$M_{H_C}$ of color-triplet Higgs multiplet as $2 \times 10^{13}~\GeV \leq
M_{H_C} \leq 2 \times 10^{... | 1992-08-01 | 2009-09-29 | [
"hep-ph"
] | J. Hisano, H. Murayama, and T. Yanagida |
hep-ph/9207276 | Gaussian Effective Potential for the U(1) Higgs Model | In order to investigate the Higgs mechanism nonperturbatively, we compute the
Gaussian effective potential (GEP) of the U(1) Higgs model ("scalar
electrodynamics"). We show that the same simple result is obtained in three
different formalisms. A general covariant gauge is used, with Landau gauge
proving to be optimal. ... | 1992-07-31 | 2007-05-23 | [
"hep-ph"
] | R. Ibanez-Meier, I. Stancu, and P. M. Stevenson |
hep-ph/9207277 | Production of Three Vector Bosons in e+e- Annihilation as a Test of W+-,
Z, gamma Self-Interactions | We study the vector-boson production processes e+e- --> WWZ and e+e-
-->WWgamma which are directly affected by the trilinear and quadrilinear self
couplings of the W, Z and gamma. Our analysis is based upon a single-parameter
effective-Lagrangian model for these self interactions which contains the
standard model as a ... | 1992-07-31 | 2009-10-22 | [
"hep-ph"
] | C. Grosse-Knetter and D. Schildknecht (Universitaet Bielefeld,
Fakutaet fuer Physik, W-4800 Bielefeld, 1 Germany) |
hep-ph/9207278 | Generalized Dimensional Analysis | I describe a version of so-called naive dimensional analysis, a rule for
estimating the sizes of terms in an effective theory below the scale of chiral
symmetry breaking induced by a strong gauge interaction. The rule is simpler
and more general than the original, which it includes as a special case. I also
give a simp... | 1992-07-31 | 2009-09-11 | [
"hep-ph"
] | Howard Georgi |
hep-ph/9207272 | Vector Meson Dominance and Free Quarks | We study the electromagnetic pion form factor and the VV - AA two point
function for momenta -(600 MeV)^2 < q^2 < (600 MeV)^2 and we note the
similarity between vector meson dominance and two versions of the free
constituent quark model. The similarity is more striking when the momentum
dependence of the quark mass is ... | 1992-07-30 | 2009-10-22 | [
"hep-ph"
] | B. Holdom |
hep-ph/9207273 | Oblique Corrections in Technicolor with a Scalar | We study a model in which the electroweak symmetry is dynamically broken by
technicolor interactions and the symmetry-breaking is communicated to the
quarks and leptons by a weak doublet of scalar fields. The scalars may be
regarded as elementary or as light bound states arising from strong extended
technicolor interac... | 1992-07-30 | 2009-10-22 | [
"hep-ph"
] | C.D. Carone and E.H. Simmons |
hep-ph/9207271 | Final-State-Interaction Simulation of T-Violation in the Top-Quark
Semileptonic Decay | The standard electroweak final-state interaction induces a false T-odd
correlation in the top-quark semileptonic decay. The correlation parameter is
calculated in the standard model and found to be considerably larger than those
that could be produced by genuine T-violation effects in a large class of
theoretical model... | 1992-07-30 | 2009-10-22 | [
"hep-ph"
] | Jiang Liu (University of Pennsylvania) |
hep-ph/9207274 | The Nucleon ``Tensor Charges'' and the Skyrme Model | The lowest moment of the twist-two, chiral-odd parton distribution $h_1(x)$
of the nucleon can be related to the so-called ``tensor charges'' of the
nucleon. We consider the tensor charges in the Skyrme model, and find that in
the large-$N_c$, SU(3)-symmetric limit, the model predicts that the octet
isosinglet tensor c... | 1992-07-30 | 2009-10-22 | [
"hep-ph"
] | James M. Olness |
hep-ph/9207275 | Test of an Equivalence Theorem at One-Loop | We show that the equivalence theorem approximating one-loop gauge sector
diagrams by including only Goldstone bosons in the loop gives a remarkably poor
approximation to the amplitude for the decay $H\rightarrow \gamma \gamma $ and
for the process $\gamma \gamma \rightarrow HH$. At one loop, large logarithms
can arise ... | 1992-07-30 | 2007-05-23 | [
"hep-ph"
] | M. S. Berger |
hep-ph/9207270 | Recent Developments in the Theory of Heavy-Quark Decays | I report on recent developments in the heavy-quark effective theory and its
application to $B$ meson decays. The parameters of the effective theory, the
spin-flavor symmetry limit, and the leading symmetry-breaking corrections to it
are discussed. The results of a QCD sum rule analysis of the universal
Isgur-Wise funct... | 1992-07-29 | 2007-05-23 | [
"hep-ph"
] | Matthias Neubert |
hep-ph/9207269 | New Higgs Signatures in Supersymmetry with Spontraneously Broken R
Parity" | Higgs production from $Z$ decay in supersymmetry with spontaneous broken R
parity proceeds mostly by the Bjorken process as in the standard model.
However, the corresponding production rates can be weaker than in the standard
model (SM), especially in the low mass region. This will substantially weaken
the Higgs boson ... | 1992-07-29 | 2009-09-17 | [
"hep-ph"
] | J Romao, F de Campos and J W F Valle |
hep-ph/9207268 | Testing Quantum Mechanics in the Neutral Kaon System | The neutral kaon system is a sensitive probe of quantum mechanics. We revive
a parametrization of non-quantum-mechanical effects that is motivated by
considerations of the nature of space-time foam, and show how it can be
constrained by new measurements of $K_L \rightarrow 2\pi$ and $K_{L,S}$
semileptonic decays at LEA... | 1992-07-29 | 2009-07-09 | [
"hep-ph",
"hep-th"
] | John Ellis, N.E. Mavromatos and D.V. Nanopoulos |
hep-ph/9207267 | Constraints from Global Symmetries on Radiative Corrections to the Higgs
Sector | We discuss the implications of global symmetries on the radiative corrections
to the Higgs sector. We focus on two examples: the charged Higgs mass in the
minimal supersymmetric model and the Higgs couplings to vector boson pairs. In
the first case, we find that in the absence of squark mixing a global
SU(2)$\times$SU(... | 1992-07-29 | 2009-10-22 | [
"hep-ph"
] | Howard E. Haber and Alex Pomarol |
hep-ph/9207266 | Navigating Around the Algebraic Jungle of QCD: Efficient Evaluation of
Loop Helicity Amplitudes | A method is developed whereby spinor helicity techniques can be used to
simplify the calculation of loop amplitudes. This is achieved by using the
Feynman-parameter representation where the offending off-shell loop momenta do
not appear. Background Feynman gauge also helps to simplify the calculations.
This method is a... | 1992-07-28 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | C.S. Lam |
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