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/9307377 | Anomalous Gauge-Boson Couplings in High Energy ep Collisions | We investigate the sensitivity of total cross sections of $e+p \rightarrow
W,Z$ to CP-conserving non-standard $WW\gamma$ couplings. We include all the
important production mechanisms and study the dependence of the total $W$ cross
sections on the anomalous $WW\gamma$ couplings, $\kappa$ and $\lambda$. We
argue that the... | 1993-08-02 | 2011-07-19 | [
"hep-ph"
] | C. S. Kim, Jungil Lee, and H. S. Song |
hep-ph/9308205 | Technicolor with a Massless Scalar Doublet | We consider a minimal technicolor model in which the ordinary and technicolor
sectors are coupled by a {\it massless} scalar doublet. When technicolor
interactions become strong, the resulting technicolor condensate not only
breaks the electroweak symmetry, but also causes the scalar to develop a vacuum
expectation val... | 1993-08-02 | 2009-09-11 | [
"hep-ph"
] | Christopher D. Carone and Howard Georgi |
hep-ph/9308206 | Parton-Parton Elastic Scattering and Rapidity Gaps at SSC and LHC
Energies | The theory of the perturbative pomeron, due to Lipatov and collaborators, is
used to compute the probability of observing parton-parton elastic scattering
and rapidity gaps between jets in hadron collisions at SSC and LHC energies. | 1993-08-02 | 2007-05-23 | [
"hep-ph"
] | Vittorio Del Duca |
hep-ph/9308203 | Do Present LEP Data Provide Evidence for Electroweak Corrections? | The Born approximation, based on $\bar\alpha \equiv\alpha (m_Z)$ instead of
$\alpha$, reproduces all electroweak precision measurements within their
$(1\sigma)$ accuracy. The low upper limits for the genuinely electroweak
corrections constitute one of the major achievements of LEP. The astonishing
smallness of these co... | 1993-08-02 | 2015-06-25 | [
"hep-ph"
] | V.A. Novikov, L.B. Okun and M.I. Vysotsky |
hep-ph/9408213 | Towards a Model-Independent Analysis of Rare $B$ Decays | Motivated by the experimental accessibility of rare $B$ decays in the ongoing
and planned experiments, we propose to undertake a model-independent analysis
of the inclusive decay rates and distributions in the processes \bgamaxs~ and
\Bsell ~($B=B^\pm$ or $B^0_d$). We show how measurements of the decay rates and
distri... | 1993-08-02 | 2015-06-25 | [
"hep-ph"
] | A. Ali, G.F. Giudice and T. Mannel |
hep-ph/9308207 | Parton-Parton Elastic Scattering and Rapidity Gaps at Tevatron Energies | The theory of the perturbative pomeron, due to Lipatov and collaborators, is
used to compute the probability of observing parton-parton elastic scattering
and rapidity gaps between jets in hadron collisions at Tevatron energies. | 1993-08-02 | 2007-05-23 | [
"hep-ph"
] | Vittorio Del Duca and Wai-Keung Tang |
hep-ph/9307375 | Small $x$ processes: Heavy Quark Production at High Energy | A brief summary is given of some recent perturbative QCD results on the
evaluation of cross sections and on the the structure of final states in
processes with incoming hadrons at small $x$. A new Monte Carlo simulation
which includes these theoretical features is described together with its
applications to the study o... | 1993-07-31 | 2007-05-23 | [
"hep-ph"
] | G. Marchesini |
hep-ph/9307376 | QCD and high energy hadronic interaction: Summary talk (theory) | Results presented in perturbative QCD are reviewed. The topics discussed
include: - struction functions, - heavy flavour production, - direct photon
production, - inclusive production at LHC/SSC, - small $x$ physics, - QCD jets
and - intermittency. For reference to the data in this talk see the summary
presented by J.E... | 1993-07-31 | 2007-05-23 | [
"hep-ph"
] | G.Marchesini |
hep-ph/9307370 | Penguin-Diagram Induced $B \rightarrow K_X\phi$ Decays in the Standard
Model and in the Two-Higgs-Doublet Model | We systematically analyse the gluonic penguin-induced charmless decays $B \ra
K_X\phi$($K_X$ denotes the meson state $s\bar q \;(q=u\ {\rm or}\ d)$ ), in the
standard model and the two-Higgs-doublet model. These processes, being induced
at one-loop level, are of great importance in measuring the virtual top quark
effec... | 1993-07-30 | 2009-10-22 | [
"hep-ph"
] | A.J.Davies, T.Hayashi, M.Matsuda and M.Tanimoto |
hep-ph/9307369 | Observing $b \rightarrow s \, \mu^+ \mu^-$ Decays at Hadron Colliders | We examine the prospects for observing weak flavour-changing neutral current
(FCNC) decays of \B\ mesons at hadron colliders, including effects of anomalous
$WWZ$~vertices. Since it is very difficult to measure the inclusive rate $B
\rightarrow X_s \, \lp \lm$ one should consider exclusive modes such as
\BKsmumu\ and \... | 1993-07-30 | 2009-10-22 | [
"hep-ph"
] | G. Baillie |
hep-ph/9307368 | Impact of QCD Corrections on the Search for the Intermediate Mass Higgs
Boson | Using next-to-leading-log calculations of Higgs production and hadronic two
photon production, a signal and background study in the intermediate mass range
of the Higgs boson is done for $\sqrt{s}=$ 40 and 14 TeV. The effects of
realistic cuts, including photon isolation, are examined. | 1993-07-30 | 2009-10-22 | [
"hep-ph"
] | Bob Bailey, Dirk Graudenz |
hep-ph/9307373 | Effective Operators and Extended Symmetry | In this note we expand on our previous study of the implications of LEP1
results for future colliders. We extend the effective operator-based analysis
of De R\'ujula et al. to a larger symmetry group, and show at which cost their
expectations can be relaxed. Of particular interest to experiment is a
rephrasing of our p... | 1993-07-30 | 2009-10-22 | [
"hep-ph"
] | J.-M. Fr\`ere, M. Tytgat, J.M. Moreno, J. Orloff |
hep-ph/9307372 | Radiative Corrections to the decay tau -> pi (K) nu_tau | We have calculated the O(alpha) radiative corrections to the tau decay tau ->
pi (K) nu, taking into account both the point meson contribution and the
structure dependent radiation. We find for the ratio Gamma(tau -> pi nu
(gamma)) / Gamma(pi -> mu nu (gamma)) a radiative correction of + 1.2% and for
Gamma(tau -> K nu ... | 1993-07-30 | 2009-10-22 | [
"hep-ph"
] | Roger Decker and Markus Finkemeier |
hep-ph/9307374 | Top Confinement | A new interaction that confines the top quark at the electroweak scale is
proposed to account for a top quark mass potentially close in value to the
electroweak scale. | 1993-07-30 | 2012-08-27 | [
"hep-ph"
] | Bijan Haeri, Jr |
hep-ph/9307371 | Large momentum expansion of two-loop self-energy diagrams with arbitrary
masses | For two-loop two-point diagrams with arbitrary masses, an algorithm to derive
the asymptotic expansion at large external momentum squared is constructed. By
using a general theorem on asymptotic expansions of Feynman diagrams, the
coefficients of the expansion are calculated analytically. For some two-loop
diagrams occ... | 1993-07-30 | 2009-10-22 | [
"hep-ph"
] | A.I. Davydychev, V.A. Smirnov and J.B. Tausk |
hep-ph/9307365 | Interpolating Axial Anomaly Induced Amplitudes | We propose an interpolating formula for the amplitude induced by the axial
anomaly, concentrating on the $\pi^0\gamma^{\ast}\gamma^{\ast}$ transition form
factor. The QCD corrections to this amplitude are generally described by two
major contributions coming from the $q\bar{q}$ bound state and the background
continuous... | 1993-07-29 | 2009-10-22 | [
"hep-ph"
] | Masako Bando and Masayasu Harada |
hep-ph/9307364 | Scheme Independence of the Effective Hamiltonian for $b \rightarrow s \,
\gamma$ and $b \rightarrow s \, g$ Decays | We present a calculation of the effective weak Hamiltonian which governs $b
\rightarrow s\, \gamma$ and $b \rightarrow s \, g$ transitions in two different
renormalization schemes (NDR and HV). In the leading logarithmic approximation,
we show that the coefficients of the effective Hamiltonian are scheme
independent on... | 1993-07-29 | 2011-04-20 | [
"hep-ph"
] | M. Ciuchini, E. Franco, G. Martinelli, L. Reina, L. Silvestrini |
hep-ph/9307363 | Lepton pairs from thermal mesons | We study the net dielectron production rates from an ensemble of thermal
mesons, using an effective Lagrangian to model their interaction. The coupling
between the electromagnetic and the hadronic sectors is done through the vector
meson dominance approach. For the first time, a complete set of light mesons is
consider... | 1993-07-29 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Charles Gale and Peter Lichard |
hep-ph/9307361 | Strongly-Interacting Electroweak Sector at Future Colliders | If there are no light Higgs bosons found below $\cal O$(800 GeV) or so, the
interactions among longitudinally-polarized vector bosons ($\wl$) will become
strong at the TeV region, and new physics that is responsible for the
electroweak symmetry breaking must emerge at this energy scale. We discuss the
phenomenological ... | 1993-07-29 | 2007-05-23 | [
"hep-ph"
] | Tao Han |
hep-ph/9307366 | Axial Anomaly and Transition Form Factors | We investigate the properties of the amplitude induced by the anomaly. In a
relatively high energy region those amplitudes are constructed by the vector
meson poles and the anomaly terms, in which the anomaly terms can be
essentially evaluated by the triangle quark graph. We pay our attention to the
anomaly term and ma... | 1993-07-29 | 2009-10-22 | [
"hep-ph"
] | Masako Bando and Masayasu Harada |
hep-ph/9307360 | Can the Electric Charges of Elementary Particles Change with Time? | We present the limits on possible time variation of the electric charges of
quarks and leptons at the time of primordial nucleosynthesis within a model
with dequantized electric charges which allows for the case of charged neutrino
and neutron. | 1993-07-29 | 2010-11-01 | [
"hep-ph"
] | A.Yu.Ignatiev and G.C.Joshi |
hep-ph/9307362 | Analytic Continuation of Thermal $N$-Point Functions from Imaginary- to
Real-Energies | We consider thermal $n$-point Green functions in the framework of quantum
field theory at finite temperature. We show how analytic continuations from
imaginary to real energies relate these functions originally defined in the
imaginary-time formalism to retarded and advanced real-time ones. The described
method is vali... | 1993-07-29 | 2014-11-17 | [
"hep-ph"
] | R. Baier and A. Niegawa |
hep-ph/9307367 | Higgs Bosons at an $\bf\epem$ Linear Collider: Theory and Phenomenology | I review recent developments in the theory and phenomenology of Higgs bosons
at an $\epem$ linear collider with $\sqrt s$ of order 500 GeV. | 1993-07-29 | 2007-05-23 | [
"hep-ph"
] | J.F. Gunion |
hep-ph/9307354 | Supersymmetric Higgs Bosons at the Limit | Using a combination of renormalisation group and effective potential methods,
we discuss the bound on the lightest CP-even Higgs boson mass $m_h$ in the
next-to-minimal supersymmetric standard model. We find $m_h\leq 146,139,149 \
GeV$ for $m_t=90,140,190 \ GeV$. | 1993-07-28 | 2007-05-23 | [
"hep-ph"
] | Stephen F. King |
hep-ph/9307357 | Energy of W distribution in top quark decays | A relatively simple analytical formula is derived for the energy spectrum of
$W$ boson in top quark decays $t\to Wb$ including ${\cal O}(\alpha_s)$
radiative corrections. We discuss the accuracy of this formula and compare it
to a more general albeit more complicated one derived in \cite{CJK}~. A Monte
Carlo algorithm ... | 1993-07-28 | 2007-05-23 | [
"hep-ph"
] | M.Je\.zabek and C. J\"unger |
hep-ph/9307349 | Topological Study of Global Quantization in Non-Abelian Gauge Theories | We study some topological aspects of non-abelian gauge theories intimately
connected to the Lie algebras of the gauge groups and the homotopy theory in
the generalized gauge orbit space. The physics connection to the
non-perturbative solution to strong CP problem as originally proposed by the
author is also discussed. ... | 1993-07-28 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | Huazhong Zhang |
hep-ph/9307350 | CP Violation Induced by Supersymmetry in $e^+e^-$ Collisions | We discuss the possibility of observing $CP$ violation predicted by the
supersymmetric standard model. | 1993-07-28 | 2007-05-23 | [
"hep-ph"
] | Yoshiki Kizukuri and Noriyuki Oshimo |
hep-ph/9307353 | Dissipative Processes in an Expanding Massive Gluon Gas | The temperature dependence of the kinetic coefficients is obtained in the
non-perturbative region with the help of Green-Kubo-type formulae in the model
of massive gluon gas motivated by numerical results from simulations of lattice
QCD. The entropy production rate is estimated using scaling hydrodynamics. It
is shown ... | 1993-07-28 | 2010-11-01 | [
"hep-ph"
] | J. Cleymans, S.V. Ilyun, S.A. Smolyansky and G.M. Zinovjev |
hep-ph/9307352 | Structure Functions of the Nucleon in a Statistical Model | Deep inelastic scattering is considered in a statistical model of the
nucleon. This incorporates certain features which are absent in the standard
parton model such as quantum statistical correlations which play a role in the
propagation of particles when considering Feynman diagrams containing internal
lines. The incl... | 1993-07-28 | 2009-10-22 | [
"hep-ph"
] | J. Cleymans, I. Dadic, J.Joubert |
hep-ph/9307356 | Non-Perturbative Isotropic Multi-Particle Production in Yang--Mills
Theory | We use singular Euclidean solutions to find multi-particle production cross
sections in field theories. We investigate a family of time-dependent O(3)
symmetrical solutions of the Yang--Mills equations, which govern the isotropic
high-energy gauge boson production. At low energies our approach reproduces the
instanton-... | 1993-07-28 | 2010-11-01 | [
"hep-ph"
] | D.Diakonov and V.Petrov (Ruhr-University Bochum, Germany) |
hep-ph/9307358 | Radiative Corrections to the top quark width | Calculations of radiative corrections to the top quark width are reviewed.
QCD effects are discussed for $t-\bar t$ systems produced in $e^+e^-$
annihilation near the energy threshold.} | 1993-07-28 | 2007-05-23 | [
"hep-ph"
] | Marek Je\.zabek, Johann H. K\"uhn and Thomas Teubner |
hep-ph/9307355 | Rapidity Correlations in $W\gamma$ Production at the Tevatron | We study the correlation of photon and charged lepton pseudorapidities,
$\eta(\gamma)$ and $\eta(\ell)$, $\ell=e,\,\mu$, in $p\bar p\rightarrow
W^\pm\gamma+X\rightarrow \ell^\pm p\llap/_T\gamma+X$ at the Tevatron. In the
Standard Model, the $\Delta\eta(\gamma,\ell)= \eta(\gamma) - \eta(\ell)$
differential cross section... | 1993-07-28 | 2007-05-23 | [
"hep-ph"
] | U. Baur, S. Errede and G. Landsberg |
hep-ph/9307359 | Cosmic balloons | Cosmic balloons, consisting of relativistic particles trapped inside a
spherical domain wall, may be created in the early universe. We calculate the
balloon mass $M$ as a function of the radius $R$ and the energy density
profile, $\rho (r)$, including the effects of gravity. At the maximum balloon
mass $2GM/R\approx 0.... | 1993-07-28 | 2009-12-30 | [
"hep-ph",
"astro-ph"
] | B. Holdom |
hep-ph/9307351 | Transition from a quark-gluon plasma in the presence of a sharp front | The effect of a sharp front separating the quark-gluon plasma phase from the
hadronic phase is investigated. Energy-momentum conservation and baryon number
conservation constrain the possible temperature jump across the front. If one
assumes that the temperature in the hadronic phase is $T\simeq$ 200 MeV , as
has been ... | 1993-07-28 | 2010-11-01 | [
"hep-ph"
] | N. Bilic, J.Cleymans, K. Redlich and E. Suhonen |
hep-ph/9307347 | Aspects of Chargino-Neutralino Production at the Tevatron Collider | We have used ISAJET 7.0/ISASUSY 1.0 to evaluate the rates and study
distributions for trilepton events from the leptonic decays of charginos and
neutralinos produced at the Fermilab Tevatron via the reaction, $p\bar
p\rightarrow \tilde{W_1} \tilde{Z_2}$ + X for cuts inspired by the CDF and D0
experiments. We find that ... | 1993-07-27 | 2009-10-22 | [
"hep-ph"
] | Howard Baer, Chung Kao and Xerxes Tata |
hep-ph/9307348 | Dynamical Growth Rate of a Diffuse Interface in First Order Phase
Transitions | We compute the dynamical prefactor in the nucleation rate of bubbles or
droplets in first order phase transitions for the case where both viscous
damping and thermal dissipation are significant. This result, which generalizes
previous work on nucleation, may be applied to study the growth of bubbles or
droplets in cond... | 1993-07-27 | 2009-10-22 | [
"hep-ph",
"cond-mat",
"nucl-th"
] | Raju Venugopalan and Axel Vischer |
hep-ph/9307340 | Photoproduction of large-mass lepton pairs at HERA as a probe of the
small $x$ structure of the proton | The photoproduction of Drell-Yan lepton pairs at HERA is studied. We show
that in the backward rapidity region the cross section is strongly sensitive to
the small-$x$ behaviour of the quark distributions in the proton, and that with
sufficient luminosity it should be possible to distinguish singular $xq \sim
x^{-1/2}$... | 1993-07-27 | 2011-07-19 | [
"hep-ph"
] | A.C.Bawa, K.Charchula and W.J.Stirling |
hep-ph/9307345 | Looking for Gluon Substructure at the Tevatron | The impact of nonrenormalizable gluon operators upon inclusive jet cross
sections is studied. Such operators could arise in an effective strong
interaction Lagrangian from gluon substructure and would induce observable
cross section deviations from pure QCD at high transverse jet energies.
Comparison of the theoretical... | 1993-07-27 | 2009-10-22 | [
"hep-ph"
] | Peter Cho and Elizabeth Simmons |
hep-ph/9307343 | Gauge created top quark condensate and heavy top | The scalar interaction term of the top mode standard model can be generated
by a gauge theory. It is emphasized that in this approach generalization to
family space directly yields a heavy top quark while leaving all other quarks
massless. By generating the new interaction from gauge extension to custodial
$SU(2)$, the... | 1993-07-27 | 2007-05-23 | [
"hep-ph"
] | R. B\"onisch |
hep-ph/9307344 | A New Model for Fermion Masses in Supersymmetric Grand Unified Theories | We present a simple model for fermion mass matrices and quark mixing in the
context of supersymmetric grand unified theories and show its agreement with
experiment. Our model realizes the GUT mass relations $m_d=3m_e$, $m_s=
m_\mu/3$, $m_b=m_\tau$ in a new way and is easily consistent with values of
$m_t$ suggested by ... | 1993-07-27 | 2010-11-01 | [
"hep-ph"
] | Alexander Kusenko and Robert Shrock |
hep-ph/9307339 | High-$Q^2$ Elastic $ed$-scattering and QCD predictions | In the framework of pertubative QCD it is argued that in the elastic
$ed$-scattering at $Q^{2}\sim$ few $(GeV/c)^{2}$ the light-cone-frame
helicity-flip amplitudes could not be omitted. The obtained $\frac{B}{A}$ ratio
of Rosenbluth structure functions is shown to be in a good agreement with
experimental data. The high... | 1993-07-27 | 2009-10-22 | [
"hep-ph"
] | A.Kobushkin and A.Syamtomov |
hep-ph/9307342 | Precise Vacuum Stability Bound in the Standard Model | In the standard model, a lower bound to the Higgs mass (for a given top quark
mass) exists if one requires that the standard model vacuum be stable. This
bound is calculated as precisely as possible, including the most recent values
of the gauge couplings, corrected two-loop beta functions and radiative
corrections to ... | 1993-07-27 | 2009-10-22 | [
"hep-ph"
] | Marc Sher |
hep-ph/9307346 | Could There Be Something Rather Than Nothing? | There is increasing evidence that the universe may have a small cosmological
constant. We suggest a scheme for naturally generating a small cosmological
constant. Our idea requires the presence of a discrete accidental symmetry
which is spontaneously broken by vacuum expectation values of the fields, and
explicitly bro... | 1993-07-27 | 2015-06-25 | [
"hep-ph"
] | W.D. Garretson and E.D. Carlson |
hep-ph/9307341 | Bubble-Bubble Interaction in the Quark-Gluon Plasma | We calculate the two-body interaction of spherical hadronic bubbles immersed
in a gluon plasma at temperatures above the phase transition. Modeling the
bubbles with the MIT bag we find that the two body potential is repulsive for
all bubble-bubble distances considered. This implies that a static
configuration of spheri... | 1993-07-27 | 2007-05-23 | [
"hep-ph"
] | Gideon Lana |
hep-ph/9307336 | Some remarks on pion condensation in relativistic heavy ion collisions | Recently it was pointed out that coherent or condensated states of pions may
account for the explanation of the Centauro events observed in cosmic ray
showers. We argue that an occurrence of condensed pions requires that the
system evolves far out of thermal equilibrium. Besides an unusual charge ratio
distribution we ... | 1993-07-26 | 2008-11-26 | [
"hep-ph"
] | C. Greiner, C. Gong and B. M\"uller |
hep-ph/9307334 | Unitarity of the Standard Model at the Higgs' Resonance | We compute a unitarity bound for higgs mass using one--loop corrected s--wave
partial amplitude for $Z_L Z_L \rightarrow Z_L Z_L$ scattering. We use the
equivalence theorem and show that the higgs mass has to be less than $\approx
600$ GeV in order to save the (perturbative) unitarity in the higgs' resonance
region. We... | 1993-07-26 | 2009-10-22 | [
"hep-ph"
] | J. Sirkka and I. Vilja |
hep-ph/9307337 | A Global Fit to Extended Oblique Parameters | The STU formalism of Peskin and Takeuchi is an elegant method for encoding
the measurable effects of new physics which couples to light fermions
dominantly through its effects on electroweak boson propagation. However, this
formalism cannot handle the case where the scale of new physics is not much
larger than the weak... | 1993-07-26 | 2019-08-17 | [
"hep-ph"
] | C.P.Burgess, S.Godfrey, H.Konig, D.London, I.Maksymyk |
hep-ph/9307331 | Reduction of Vector and Axial--Vector Fields in a Bosonized
Nambu--Jona--Lasinio Model | We derive the effective action for pseudoscalar mesons by integrating out
vector and axial--vector collective fields in the generating functional of the
bosonized NJL--model. The corresponding modifications of the nonlinear
effective Lagrangian and the bosonized currents, arising at $O(p^4)$, are
discussed. | 1993-07-26 | 2007-05-23 | [
"hep-ph"
] | A.A.Bel'kov, A.V.Lanyov, A.Schaale |
hep-ph/9307332 | Predictions for Semileptonic Decays $\bar{B}\to D(D^*)\pi\ell\bar{\nu}$
and Weak Radiative Decays of Bottom Hadrons | The semileptonic decays $\bar{B}\to D(D^*)\pi\ell\bar{\nu}$ are analyzed by
heavy quark and chiral symmetries. The branching ratio is of order of a few
percent for $\dpi$, but it is much smaller for $\dstar$, of order
$10^{-4}-10^{-5}$. The decay mode $B^-\to D^+\pi^-e^-\bar{\nu}_e$ provides a
nice place for extracting... | 1993-07-26 | 2007-05-23 | [
"hep-ph"
] | Hai-Yang Cheng |
hep-ph/9307335 | Thermal Bubble Diagrams Near Zero Energy | The zero four-momentum and equal mass limits are taken for the bubble diagram
of scalar fields. It is seen that RTF and ITF are in complete agreement.
However contributions from this diagram to both retarded and time-ordered
functions do depend on the order of the limits and can be infinite in some
cases. This shows ex... | 1993-07-26 | 2007-05-23 | [
"hep-ph"
] | T.S.Evans |
hep-ph/9307333 | Low Energy Constraints and Anomalous Triple Gauge Boson Couplings | Low energy (1-loop) constraints on anomalous triple gauge boson vertices
(TGV's) are revisited and compared to the sensitivity achievable at LEP II and
at future linear $e^+e^-$ colliders. The analysis is performed within the
framework of an effective Lagrangian of gauge invariant dimension six operators
with the gauge... | 1993-07-26 | 2007-05-23 | [
"hep-ph"
] | D. Zeppenfeld |
hep-ph/9307338 | Gluon Radiation and Top Width Effects | The large width of the top quark influences the way gluons are radiated in
top events, giving rise to interesting interference effects in top production
and decay. We discuss top width effects in soft guon radiation in $\ee \to \tt$
at high energies and near $\tt$ threshold. | 1993-07-26 | 2008-02-03 | [
"hep-ph"
] | L.H. Orr, Yu.L. Dokshitzer, V.A. Khoze, and W.J. Stirling |
hep-ph/9307330 | Radiative Heavy Meson Transitions | We evaluate the radiative and hadronic decay rates of the $D^*$ mesons using
the Heavy Quark Effective Theory and the Vector Meson Dominance hypothesis. We
also estimate the width of the $B^*$ electromagnetic transitions and the
radiative decays of positive parity $J^P=0^+, 1^+$ charmed mesons. | 1993-07-24 | 2009-10-22 | [
"hep-ph"
] | P.Colangelo, F.De Fazio and G.Nardulli |
hep-ph/9307328 | Mini-charged tau neutrinos? | Theoretically, the electric charge of the tau neutrino may be non-zero. The
experimental bound on the electric charge of the tau neutrino is many orders of
magnitude weaker than that for any other known neutrino. If the tau neutrino
does have a small electric charge, and its mass is greater than 1 MeV, then it
can anni... | 1993-07-23 | 2009-10-22 | [
"hep-ph"
] | R. Foot and H. Lew |
hep-ph/9307326 | Hard Thermal Loops, Gauged WZNW Action and the Energy of Hot Quark-Gluon
Plasma | The generating functional for hard thermal loops in QCD is rewritten in terms
of a gauged WZNW action by introducing an auxiliary field. This shows in a
simple way that the contribution of hard thermal loops to the energy of the
quark-gluon plasma is positive. | 1993-07-23 | 2009-12-30 | [
"hep-ph",
"hep-th"
] | V.P.Nair |
hep-ph/9307329 | Novel Quark Fragmentation Functions and the Nucleon's Transversity
Distribution | We define twist-two and twist-three quark fragmentation functions in Quantum
Chromodynamics (QCD) and study their physical implications. Using this
formalism we show how the nucleon's transversity distribution can be measured
in single pion inclusive electroproduction. | 1993-07-23 | 2010-11-01 | [
"hep-ph"
] | R. L. Jaffe and Xiangdong Ji |
hep-ph/9307327 | Some Exact Results for Two-Loop Diagrams with Three and Four External
Lines | Evaluation of three- and four-point diagrams with massless internal particles
and arbitrary external momenta is considered. Exact results for some two-loop
diagrams (planar and non-planar three-point contributions and the "double box"
diagram) are obtained in terms of polylogarithms. | 1993-07-23 | 2007-05-23 | [
"hep-ph"
] | N.I. Ussyukina and A.I. Davydychev |
hep-ph/9307323 | Standard and hypergeometric representations for loop diagrams and the
photon-photon scattering | By using the example of photon-photon scattering box diagrams, different
representations for loop integrals are discussed. A connection between
hypergeometric representation and dilogarithms is derived. An explicit analytic
continuation formula to large values of Mandelstam variables is constructed. | 1993-07-22 | 2007-05-23 | [
"hep-ph"
] | A.I. Davydychev |
hep-ph/9307321 | Phase Structure of a Quantized Chiral Soliton on S^3 | A quantization of a breathing motion of a rotating chiral soliton on $S^3$ is
performed in terms of a family of trial functions for a profile function of the
hegdehog ansatz. We determine eigenenergies of the quantized $S^3$ skyrmion by
solving the Schr\"odinger equation of the breathing mode for several lower spin
and... | 1993-07-22 | 2017-02-01 | [
"hep-ph"
] | Akizo Kobayashi and Shoji Sawada |
hep-ph/9307322 | Particle Spectrum in Supersymmetric Models with a Gauge Singlet | We scan the complete parameter space of the supersymmetric standard model
extended by a gauge singlet, which is compatible with the following
constraints: universal soft supersymmetry breaking terms at the GUT scale,
finite running Yukawa couplings up to the GUT scale and present experimental
bounds on all sparticles, ... | 1993-07-22 | 2011-01-13 | [
"hep-ph"
] | Ulrich Ellwanger, Michel Rausch de Traubenberg, Carlos A. Savoy |
hep-ph/9307325 | Evolution of cosmic string configurations | We extend and develop our previous work on the evolution of a network of
cosmic strings. The new treatment is based on an analysis of the probability
distribution of the end-to-end distance of a randomly chosen segment of
left-moving string of given length. The description involves three distinct
length scales: $\xi$, ... | 1993-07-22 | 2016-09-01 | [
"hep-ph",
"astro-ph"
] | Daren Austin, E.J. Copeland and T.W.B. Kibble |
hep-ph/9307317 | Destabilizing Divergences in Supergravity-Coupled Supersymmetric
Theories | Nonrenormalizable couplings in supergravity-coupled supersymmetric theories
can give rise to power-law divergences that destabilize the weak-scale
hierarchy. For the case of the standard-model gauge group, the problem can
arise in theories with \321 gauge-singlet chiral superfields. The minimal
supersymmetric standard ... | 1993-07-22 | 2016-09-01 | [
"hep-ph",
"hep-th"
] | Jonathan Bagger and Erich Poppitz |
hep-ph/9307318 | A 1993 Look at the Lower Bound on the Top Quark Mass from CP Violation | We point out that the lower bound on $m_t$ from the CP violation parameter
$\epsilon_K$ has increased considerably. Using Wolfenstein parametrization of
the CKM matrix we derive an analytic expression for this bound as a function of
$\mid V_{cb}\mid, \mid V_{ub}/V_{cb}\mid$ and the non-perturbative parameter
$B_K$. For... | 1993-07-22 | 2010-11-01 | [
"hep-ph"
] | Andrzej J. Buras |
hep-ph/9307320 | Light Gluinos and Unification of Couplings | We analyze the implications of the light gluino scenario for the unification
of gauge and Yukawa couplings within the minimal supersymmetric standard model.
Within this scheme all fermionic supersymmetric particles are naturally light,
while the scalar partners of quarks and leptons, together with the heavy Higgs
doubl... | 1993-07-22 | 2008-11-26 | [
"hep-ph"
] | M. Carena, L. Clavelli, D. Matalliotakis, H.P. Nilles, C.E.M. Wagner |
hep-ph/9307319 | On The Exact Implementation Of Gauss' Law In Yang-Mills Theory | It is possible to find different sets of local coordinates in the field space
of Yang-Mills theories which implement Gauss' law manifestly for physical
states. The singular points of the transformations to these gauge-invariant
coordinates induce energy barriers in the Hamiltonian much like angular
momentum in quantum ... | 1993-07-22 | 2007-05-23 | [
"hep-ph"
] | P.E. Haagensen |
hep-ph/9307324 | Single Leptoquark Production at $e^+e^-$ and $\gamma\gamma$ Colliders | We consider single production of leptoquarks (LQ's) at $e^+e^-$ and
$\gamma\gamma$ colliders, for two values of the centre-of-mass energy,
$\sqrt{s}=500$ GeV and 1 TeV. We find that LQ's which couple within the first
generation are observable for LQ masses almost up to the kinematic limit, both
at $e^+e^-$ and $\gamma\... | 1993-07-22 | 2009-10-22 | [
"hep-ph"
] | G. Belanger, D. London and H. Nadeau |
hep-ph/9307316 | A New Class of Majoron-Emitting Double-Beta Decays | Motivated by the excess events that have recently been found near the
endpoints of the double beta decay spectra of several elements, we re-examine
models in which double beta decay can proceed through the neutrinoless emission
of massless Nambu-Goldstone bosons (majorons). Noting that models proposed to
date for this ... | 1993-07-21 | 2009-10-22 | [
"hep-ph"
] | C.P. Burgess and J.M. Cline |
hep-ph/9307314 | On the Proton Form Factors in the Time-Like Region | The process $ \bar{p} p \rightarrow e^{-} e^{+} $ is considered in the
general case of polarized initial particles. A relation between the difference
of the phases of the electromagnetic form factors $G_M$ and $G_E$ in the
time-like region and measurable asymmetries is derived. It is shown that the
moduli of the form f... | 1993-07-21 | 2007-05-23 | [
"hep-ph"
] | S.M. Bilenky, C. Giunti and V. Wataghin |
hep-ph/9307315 | $\Upsilon$ decay into charmonium and the color octet mechanism | A factorization theorem for $P$-wave quarkonium production, recently derived
by Bodwin, Braaten, Yuan and Lepage, is applied to $\Upsilon \to \chi_{cJ} +
X$, where $\chi_{cJ}$ labels the ${}^3 P_J$ charmonium states. The widths for
$\chi_{cJ}$ production through color-singlet $P$-wave and color-octet $S$-wave
$c \bar c... | 1993-07-21 | 2009-10-22 | [
"hep-ph"
] | Howard D. Trottier |
hep-ph/9307312 | Signals for Scalar Top Quark at $ep$ Collider HERA | In the framework of the minimal supersymmetric standard model (MSSM) and the
R-parity breaking model (RBM), we investigate production processes of the
scalar top (stop) at HERA energies. These models are characterized by the
possible existence of the light stop whose mass is lighter than those of the
top quark and the ... | 1993-07-21 | 2009-10-22 | [
"hep-ph"
] | Tadashi Kon, Tetsuro Kobayashi, Shoichi Kitamura, Keiichiro Nakamura
and Shunji Adachi |
hep-ph/9307313 | Hard $\gamma \gamma$ Collisions at Future $e^+ e^-$ LINACs | We update our previous calculation of di--jet production in two--photon
collisions at future \ee\ colliders, including both beam-- and bremsstrahlung.
We then discuss the production of heavy ($c,b,t$) quarks. Our study
re--confirms that colliders with much beamstrahlung offer no physics advantages
over designs with lit... | 1993-07-21 | 2007-05-23 | [
"hep-ph"
] | M. Drees and R.M. Godbole |
hep-ph/9307304 | Twist-Four Distributions in a Transversely-Polarized Nucleon and the
Drell-Yan Process | The twist-four quark and gluon distributions in a transversely polarized
nucleon are identified and relations among them are discussed by using QCD
equations of motion. Their contribution, at the order of ${\cal O} \left( 1/Q^2
\right)$, to the Drell-Yan cross section in transversely polarized
nucleon-nucleon collision... | 1993-07-20 | 2009-10-22 | [
"hep-ph"
] | Pevrez Hoodbhoy and Xiangdong Xi |
hep-ph/9307310 | Constraints on Extended Technicolor Models from B -> mu+ mu- X | A recent study by Randall and Sundrum shows that models of Extended
Technicolor (ETC) have interesting implications on rare B decays. We extend
their study to the decay B -> mu+ mu- X. ETC models with a GIM mechanism
predict a decay rate that is a factor of order 30 above the Standard Model,
violating the experimental ... | 1993-07-20 | 2009-10-22 | [
"hep-ph"
] | Benjamin Grinstein, Yosef Nir and Joao M. Soares |
hep-ph/9307305 | The String Unufication of Gauge Cuoplings and Gauge Kinetic Mixings | In the superstring models we have not only the complete {\bf 27} multiplets
of $E_6$ but also extra incomplete $({\bf 27}+{\overline {\bf 27}})$ chiral
supermultiplets being alive at low energies. Associated with these additional
multiplets, when the gauge symmetry contains more than one $U(1)$ gauge group,
there may e... | 1993-07-20 | 2017-02-01 | [
"hep-ph"
] | Chuichiro Hattori, Masahisa Matsuda, Takeo Matsuoka, Daizo Mochinaga |
hep-ph/9307308 | FCNCs in SUSY GUTs (flavor changing neutral currents in predictive
SUSY-GUTS) | Constraints from flavour changing neutral currents are discussed in the
context of predictive Grand Unified Supersymmetric Theories. Uncertainties in
the estimation of their amplitudes are minimized by using a successful mass
matrix ansatz which predicts the arbitrary parameters of the Standard Model.
Furthermore, Reno... | 1993-07-20 | 2009-10-22 | [
"hep-ph"
] | G.K. Leontaris |
hep-ph/9307301 | Supersymmetric $b \rightarrow s \gamma$ with Large Chargino
Contributions | Supersymmetric (SUSY) theories are often thought to give large branching
ratios for $b \rightarrow s \gamma$ from charged Higgs loops. We show that in
many cases chargino loop contributions can cancel those of the Higgs, and SUSY
can give $B(b \rightarrow s \gamma)$ at or below the \SM\ prediction. We show
this occurs ... | 1993-07-20 | 2009-10-22 | [
"hep-ph"
] | Robert Garisto and John N. Ng |
hep-ph/9307309 | Beyond the Standard Model | These are three lectures given at the ``Lake Louise Winter Institute", (Lake
Louise Canada, Feb 1993). A pedagogical introduction is given to attempts to
formulate a more fundamental theory of elementary particles than that provided
by the standard model. After a review of the basic elements of the standard
model, its ... | 1993-07-20 | 2007-05-23 | [
"hep-ph"
] | Graciela Gelmini |
hep-ph/9307307 | On the Renormalization of Heavy Quark Effective Field Theory | The construction of heavy quark effective field theory (HqEFT) is extended to
arbitrary order in both expansion parameters $\alpha_s$ and $1/m_q$. Matching
conditions are discussed for the general case, and it is verified that this
approach correctly reproduces the infrared behaviour of full QCD. Choosing a
renormaliza... | 1993-07-20 | 2013-11-13 | [
"hep-ph"
] | W. Kilian and T. Mannel |
hep-ph/9307302 | rho, omega, phi-Nucleon Scattering Lengths from QCD Sum Rules | The QCD sum rule method is applied to derive a formula for the rho, omega,
phi meson-nucleon spin-isospin-averaged scattering lengths
$a_{\rho,\omega,\phi}$. We found that the crucial matrix elements are
$\langle\bar{q}\gamma_\mu D_\nu q\rangle_N$ ($q=u,d$) (twist-2 nucleon matrix
element) for $a_{\rho,\omega}$ and $m_... | 1993-07-20 | 2008-11-26 | [
"hep-ph",
"nucl-th"
] | Y. Koike |
hep-ph/9307303 | Interpolating the Nucleon's Spin-Dependent Sum Rules at High and Low
Energies | I discuss a few interpolating sum rules for spin structure functions of the
nucleon. Using the concept of duality, I argue that the $G_1$ sum rule,
including the elastic contribution, is useful for learning higher twist matrix
elements of the nucleon. | 1993-07-20 | 2010-11-01 | [
"hep-ph"
] | Xiangdong Ji |
hep-ph/9307311 | Next-to-Leading Order QCD Corrections to Jet Cross Sections and Jet
Rates in Deeply Inelastic Electron Proton Scattering | Jet cross sections in deeply inelastic scattering in the case of transverse
photon exchange for the production of (1+1) and (2+1) jets are calculated in
next-to-leading order QCD (here the `+1' stands for the target remnant jet,
which is included in the jet definition for reasons that will become clear in
the main text... | 1993-07-20 | 2009-10-22 | [
"hep-ph"
] | Dirk Graudenz |
hep-ph/9307306 | High--Energy Multiparticle Distributions and a Generalized Lattice Gas
Model | A simple lattice gas model in one dimension is constructed in which each site
can be occupied by at most one particle of any one of $D$ species. Particles
interact with a randomly drawn nearest neighbor interaction. This model is
capable of reproducing the factorial moments observed in high--energy
scattering. In the l... | 1993-07-20 | 2007-05-23 | [
"hep-ph",
"nucl-th"
] | A.D. Jackson, T. Wettig and N.L. Balazs |
hep-ph/9307296 | Two-Body Nonleptonic Decays of Charmed Mesons | Two-body nonleptonic decays of charmed mesons are studied on the basis of a
simple pole-dominance model involving the vector, pseudoscalar and axial-vector
meson poles. | 1993-07-19 | 2008-11-26 | [
"hep-ph"
] | P. Bedaque, A. Das and V. S. Mathur |
hep-ph/9307298 | The Rate Difference between the Weak Decays of $t$ and $\bar{t}$ in
Supersymmetry | We find that the $CP$-violating asymmetry $$ \frac{\Gamma \left(t \rightarrow
bW^+ \right) - \Gamma \left(\bar{t} \rightarrow \bar{b}W^- \right)} {\Gamma
\left(t \rightarrow bW^+ \right) + \Gamma \left(\bar{t} \rightarrow \bar{b}W^-
\right)} $$ at the one-loop order within the minimal supersymmetric extension
of the st... | 1993-07-19 | 2010-11-01 | [
"hep-ph"
] | E.C. Christova and M. Fabbrichesi |
hep-ph/9307293 | The SUSY World | Summary Talk of the Workshop `Properties of SUSY particles' Erice, September
28 -- October 4, 1992. | 1993-07-19 | 2007-05-23 | [
"hep-ph"
] | Fabio Zwirner |
hep-ph/9307295 | Universality-Breaking Effects in Leptonic Z Decays | We analyze the possibility of universality violation in diagonal leptonic
decays of the $Z$ boson, in the context of interfamily "see-saw" models. In a
minimal extension of the Standard Model with right-handed neutrino fields, we
find that universality-breaking effects increase quadratically with the heavy
Majorana neu... | 1993-07-19 | 2009-10-22 | [
"hep-ph"
] | J. Bernabeu, J. Korner, A. Pilaftsis, K. Schilcher |
hep-ph/9307299 | Flavor Dependence of Sea Quark Structure Functions | Quark masses are shown to play an important role in the nucleon sea. Our
analysis using massive QCD splitting functions demonstrates the existence of
two Feynman-$x$ sea regimes. For small $x$ the strange sea is larger while at
large $x$ the non-strange light sea is dominant. This crossover effect has been
observed in ... | 1993-07-19 | 2007-05-23 | [
"hep-ph"
] | C.S. Kim, S.M. Kim, and M.G. Olsson |
hep-ph/9307300 | Probing the $WW\gamma$ Vertex in Radiative $b$-Quark Decays | The recent CLEO results on on radiative $b$-quark decays are used to derive
constraints on anomalous $WW\gamma$ couplings. These constraints are compared
with expectations from $p\bar p\rightarrow e^\pm p\llap/_T\gamma+X$ at the
Tevatron. The usefulness of exclusive radiative $B$ meson decay channels in
probing the $WW... | 1993-07-19 | 2007-05-23 | [
"hep-ph"
] | U. Baur |
hep-ph/9307292 | Twisting Toroidal Magnetic Fields and the Seasonal Oscillation of the
Solar Neutrino Flux II | An intriguing possibility is explored that the solar neutrino data could be
used as a probe to the magnetic field structure in the sun. Various cyclic
phenomena occurring on the surface of the sun have been accounted for by the
so-called dynamo-mechanism. According to this, a self-generating mechanism of
solar cyclic a... | 1993-07-19 | 2007-05-23 | [
"hep-ph"
] | Takahiro Kubota, Takeshi Kurimoto and Eiichi Takasugi |
hep-ph/9307297 | Out of Equilibrium Phase Transitions and a Toy Model for Disoriented
Chiral Condensates | We study the dynamics of a second order phase transition in a situation
thatmimics a sudden quench to a temperature below the critical temperature in a
model with dynamical symmetry breaking. In particular we show that the domains
of correlated values of the condensate grow as $\sqrt{t}$ and that this result
seems to b... | 1993-07-19 | 2015-06-25 | [
"hep-ph",
"hep-th"
] | Paulo Bedaque and Ashok Das |
hep-ph/9307294 | Composite Supersymmetric Axion-Dilaton-Dilatino System and the breaking
of Supersymmetry | The spontaneous breakdown of the scale, the chiral and the superconformal
symmetries for a hidden $SU(N)$ gauge group is studied in an effective
lagrangean approach. The relevant low-energy degrees of freedom are taken to be
the composite Goldstone particles associated with these three broken
symmetries. Supersymmetry ... | 1993-07-19 | 2009-10-22 | [
"hep-ph"
] | E.A.Dudas |
hep-ph/9307291 | Next--to--Leading Order Corrections to Meson Masses in the Heavy Quark
Effective Theory | We use the QCD sum rule approach to calculate the splitting between vector
and pseudoscalar mesons containing one light and one heavy quark, and the
kinetic energy of the heavy quark. Our result for the splitting induced by the
chromomagnetic interaction agrees to the experimental data on charm and beauty
mesons. For t... | 1993-07-18 | 2011-01-25 | [
"hep-ph"
] | P. Ball, V.M. Braun |
hep-ph/9307290 | Phenomenology of $B_s$ Decays | Using the QCD sum rules technique we study several aspects of the
phenomenology of the b-flavoured strange meson $B_s^0$. In particular, we
evaluate the mass of the particle, the leptonic constant and the form factors
of the decays $\overline {B_s^0} \to D^{+}_s \ell^- \bar\nu$, $\overline
{B_s^0} \to D^{*+}_s \ell^- \... | 1993-07-17 | 2009-10-22 | [
"hep-ph"
] | P.Blasi, P.Colangelo, G.Nardulli AND N.Paver |
hep-ph/9307288 | Exact Relations for Heavy-Light Quark Systems | We derive general relations among hadronic form factors involving one heavy
meson $b\bar{q}$ and another, not necessarily heavy, meson $Q\bar{q}$. The
relations are valid to all orders of mass corrections of $m_Q$ . | 1993-07-16 | 2007-05-23 | [
"hep-ph"
] | Patrick J. O'Donnell and Humphrey K.K. Tung |
hep-ph/9307286 | Cusp Annihilation on Ordinary Cosmic Strings | The order of magnitude of energy emission from cusps to light bosons on
ordinary cosmic strings is calculated perturbatively. The analysis is
applicable to both closed string loops and long cosmic strings. The
perturbative result obtained here is much less than what is found by
non-perturbative approximations. | 1993-07-16 | 2009-10-22 | [
"hep-ph",
"astro-ph"
] | Masoud Mohazzab (Brown) |
hep-ph/9307289 | TeV Muons in Hadronic Showers | {}From the study of the multiple muon events in deep underground detectors,
it is possible to extract information about the spectrum and composition of the
primary cosmic rays. In this work the number of TeV muons produced by a primary
cosmic ray of a given energy and zenith angle is computed using analytic and
monteca... | 1993-07-16 | 2010-11-01 | [
"hep-ph"
] | P.Lipari (INFN sezione di Roma) |
hep-ph/9307284 | Sphaleron Effects Near the Critical Temperature | We discuss one-loop radiative corrections to the sphaleron-induced baryon
number-violating transition rate near the electroweak phase transition in the
standard model. We emphasize that in the case of a first-order transition a
rearrangement of the loop expansion is required close to the transition
temperature. The cor... | 1993-07-16 | 2011-07-19 | [
"hep-ph"
] | Meik Hellmund, Jochen Kripfganz, Michael G. Schmidt |
hep-ph/9307287 | The Mass of the Heavy Axion $\eta_6$ | If electroweak dynamical symmetry breaking is due to a chiral condensate of
color sextet quarks, dynamics analagous to ``walking technicolor'' will enhance
the condensate by orders of magnitude compared to the electroweak chiral scale.
This enhancement compensates for the exponential suppression of electroweak
scale co... | 1993-07-16 | 2007-05-23 | [
"hep-ph"
] | Alan R. White |
hep-ph/9307285 | Non-Leptonic Kaon Decays and the Chiral Anomaly | An investigation is performed of all non-leptonic kaon decays sensitive to
the chiral anomaly. Within the framework of chiral perturbation theory, there
are two classes of anomalous amplitudes at $O(p^4)$: reducible and direct
contributions. Only radiative transitions are affected by the anomaly. The
phenomenology of t... | 1993-07-16 | 2009-10-22 | [
"hep-ph"
] | G. Ecker, H. Neufeld and A. Pich |
hep-ph/9307283 | PCAC relation for Dstar -> D axial form factors | A relation among the form factors of $<D \mid A_\mu \mid D^*>$ at $q^2 \to 0$
is derived. It is verified to lowest order in both the $1/m_c$ expansion and
the expansion in number of derivatives using the effective lagrangian that
incorporates the heavy quark symmetries for the b and c quarks, and the chiral
symmetry fo... | 1993-07-16 | 2020-03-17 | [
"hep-ph"
] | Claudio O. Dib and J. Taron |
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