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 |
|---|---|---|---|---|---|---|
hep-ph/9311313 | How Strong is the Evidence for Electroweak Corrections Beyond the
Running of $\alpha$? | The evidence for electroweak radiative corrections not contained in
$\alpha(m_Z)$ is examined. At low energies there is very strong evidence in the
analysis of the unitarity of the CKM matrix. At LEP and collider experiments
the current direct signals are not strong, but there is substantial indirect
evidence, which wi... | 1993-11-18 | 2010-11-01 | [
"hep-ph"
] | Alberto Sirlin |
hep-ph/9311308 | Hadronic Event Shapes in $B$ Decay | We compute the differential momentum correlation function for hadrons
produced in the decay of $B$-mesons. This measure of hadronic event shapes
tests the free $b$-quark decay picture for nonleptonic and semileptonic decays
of $B$-mesons. Our results can also be applied to $B_s$ and $\Lambda_b$ decay. | 1993-11-18 | 2009-10-22 | [
"hep-ph"
] | Michael Luke, Martin J. Savage and Mark B. Wise |
hep-ph/9311312 | Z_2\times Z_2$ orbifold compactification as the origin of realistic free
fermionic models | I discuss the correspondence between realistic four dimensional free
fermionic models and $Z_2\times Z_2$ orbifold compactification. %I illustrate
this correspondence for one particular example. I discuss the properties of the
$Z_2\times Z_2$ orbifold that are reflected in the realistic free fermionic
models. I argue t... | 1993-11-18 | 2010-11-01 | [
"hep-ph",
"hep-th"
] | Alon E. Faraggi |
hep-ph/9311311 | Recent Progress in Understanding Quark and Gluon Distribution Functions
for Large Nuclei at Small x | I discuss the problem of computing the structure functions for very heavy
nuclei at small Bjorken x. The approximations used in this description are
physically motivated, and recent computations reviewed. | 1993-11-18 | 2007-05-23 | [
"hep-ph"
] | L. McLerran |
hep-ph/9311309 | Hadrons of Arbitrary Spin and Heavy Quark Symmetry | We present a general construction of the spin content of the Bethe-Salpeter
amplitudes (covariant wave functions) for heavy hadrons with arbitrary orbital
excitations, using representations of the Lorentz group. These wave functions
incorporate the symmetries manifest in the heavy quark limit. In the baryonic
sector we... | 1993-11-18 | 2008-02-03 | [
"hep-ph"
] | F. Hussain, G. Thompson and J.G. Koerner |
hep-ph/9311303 | Five Jet Production with Heavy Quarks at $e^+ e^-$ Colliders | Heavy quark production in five jet events at $e^+e^-$ colliders is studied at
tree level using helicity amplitudes. Total production rates for $2b3j$ and
$4bj$ are given and compared with the corresponding results for massless
quarks. The process $e^+e^-\rightarrow q\bar q gg\gamma$ which is the dominant
contribution t... | 1993-11-17 | 2010-11-01 | [
"hep-ph"
] | A. Ballestrero and E. Maina |
hep-ph/9311304 | Strong Decays of Strange Charmed P-Wave Mesons | Goldstone boson decays of P-wave $D_s^{**}$ mesons are studied within the
framework of Heavy Hadron Chiral Perturbation Theory. We first analyze the
simplest single kaon decays of these strange charmed mesons. We derive a model
independent prediction for the width of $D_{s2}$ and use experimental
information on $D_{s1}... | 1993-11-17 | 2009-10-22 | [
"hep-ph"
] | Peter Cho and Sandip P. Trivedi |
hep-ph/9311305 | Supersymmetry Anomalies, the Witten Index and the Standard Model | The supersymmetric standard model (SSM) contains a wealth of potential
supersymmetry anomalies, all of which occur in the renormalization of composite
operators of the theory. The coefficients of the weak-E.M. superanomalies
should be related to the Witten indices of the neutrino and photon superfields,
and the coeffic... | 1993-11-17 | 2007-05-23 | [
"hep-ph",
"hep-th"
] | John Dixon |
hep-ph/9311306 | New Constraints on Neutrino Oscillations in Vacuum as a Possible
Solution of the Solar Neutrino Problem | Two-neutrino oscillations in vacuum are studied as a possible solution of the
solar neutrino problem. New constraints on the parameter sn2, characterizing
the mixing of the electron neutrino with another active or sterile neutrino, as
well as on the mass--squared difference, dm2, of their massive neutrino
components, a... | 1993-11-17 | 2009-10-22 | [
"hep-ph"
] | P.I. Krastev and S.T. Petcov |
hep-ph/9311302 | Status of QCD | I have been asked to discuss the status of QCD. It seems to me that there are
three main points to be made about the present status of QCD: $\bullet$ QCD is
right, and we can do many beautiful things with it. $\bullet$ There are several
important concrete problems that lie just beyond the edge of our current
understand... | 1993-11-16 | 2015-06-25 | [
"hep-ph"
] | Frank Wilczek |
hep-ph/9311299 | Higher Resonance Contributions to the Adler-Weisberger Sum Rule in the
Large N_c Limit | We determine the $N_c$--dependence of the resonance contributions to the
Adler--Weisberger sum rule for the inverse square $1/g_A^2$ of the axial charge
coupling constant and show that in the large $N_c$ limit the contributions of
the Roper-like excitations scale as $O(1/N_c)$. Consistency with the $1/N_c^2$
scaling of... | 1993-11-16 | 2011-08-17 | [
"hep-ph",
"nucl-th"
] | A. Wirzba, M. Kirchbach and D.O. Riska |
hep-ph/9311300 | Supersymmetry and Light Quark Masses in a Realistic Superstring Model | We examine the light quark masses in a standard--like superstring model in
the four dimensional free fermionic formulation. We find that the supersymmetry
constraints in the observable and hidden sectors eliminate all large
contributions to $m_u$ and $m_d$ and force them to be much smaller than the
other quark masses. ... | 1993-11-16 | 2009-10-22 | [
"hep-ph"
] | Edi Halyo |
hep-ph/9311301 | Monofractal Density Fluctuations and Scaling Laws for Count
Probabilities and Combinants | The relation of combinants to various statistics characterizing the
fluctuation pattern of multihadron final states is discussed. Scaling laws are
derived for count probabilities and combinants in the presence of homogeneous
and clustered monofractal density fluctuations. It is argued that both types of
scaling rules a... | 1993-11-16 | 2009-10-22 | [
"hep-ph"
] | S. Hegyi |
hep-ph/9311298 | A Large Majorana-Mass From Calabi-Yau Superstring Models | In Calabi-Yau superstring models it is found that two large intermediate
energy scales of symmetry breaking can be induced for special types of the
nonrenormalizable interactions. In the models one set of $SO(10)$-singlet,
right-handed neutrino and their mirror chiral superfields is needed. Through
the study of the min... | 1993-11-16 | 2009-10-22 | [
"hep-ph"
] | Naoyuki Haba, Chuichiro Hattori, Masahisa Matsuda, Takeo Matsuoka and
Daizo Mochinaga |
hep-ph/9311296 | Scattering in the Presence of Electroweak Phase Transition Bubble Walls | We investigate the motion of fermions in the presence of an electro\-weak
phase transition bubble wall. We derive and solve the Dirac equation for such
fer\-mions, and compute the transmission and reflection coefficients for
fermions traveling from the symmetric to the asymmetric phases separated by the
domain wall. | 1993-11-15 | 2009-10-22 | [
"hep-ph"
] | Alejandro Ayala, Jamal Jalilian--Marian, Larry McLerran and Axel P.
Vischer |
hep-ph/9311291 | Spacetime Symmetries and Semiclassical Amplitudes | We examine the spacetime symmetries of forward $2 \rightarrow 2$ scattering.
These symmetries have non-trivial consequences for any class of configurations
which might dominate the amplitude in the semiclassical approximation. We
derive some dynamical results regarding the stability of configurations which
arise solely... | 1993-11-15 | 2010-11-01 | [
"hep-ph"
] | Thomas M. Gould and Stephen D.H. Hsu |
hep-ph/9311297 | Signals for Vector Leptoquarks in Hadronic Collisions | We analyze systematically the signatures of vector leptoquarks in hadronic
collisions. We examine their single and pair productions, as well as their
effects on the production of lepton pairs. Our results indicate that a machine
like the CERN Large Hadron Collider (LHC) will be able to unravel the existence
of vector l... | 1993-11-15 | 2009-10-22 | [
"hep-ph"
] | J.E. Cieza Montalvo and O.J.P. Eboli |
hep-ph/9311295 | What can we learn from new measurements of Dalitz plot parameters for K
$\rightarrow 3 \pi$ decays ? | We give a simple expression in linear and quadratic Dalitz--plot slopes which
does not depend on the charge combination of the $3\pi$ state $(K^\pm \to
\pi^{\pm}\pi^{+}\pi^{-}$ or $\pi^{\pm}\pi^{0}\pi^{0}$ and $K_L^{0} \to
\pi^{+}\pi^{-}\pi^{0}$ or $\pi^{0}\pi^{0}\pi^{0})$, if all phases between final
states are neglig... | 1993-11-15 | 2009-09-25 | [
"hep-ph"
] | A.A.Bel'kov, G.Bohm, F.Matth\"ai, A.V.Lanyov, A.Schaale |
hep-ph/9311293 | On soft breaking and CP phases in the supersymmetric standard model | We consider a class of N=1 supersymmetric extensions of the Standard Model in
which the soft breaking sector is CP conserving at the GUT scale. We study the
question of whether the presence of explicit CP violation in the Yukawa sector
of the theory induces through renormalization effects CP violating phases in
the sof... | 1993-11-15 | 2010-11-01 | [
"hep-ph"
] | S. Bertolini and F. Vissani |
hep-ph/9311292 | Vibrational Aspects of the SU(2) Skyrmion | We treat the Skyrme model with the breathing mode in a situation involving
two quartic terms. It is seen that there is a new limit for large $e$ due to
the breathing mode not found in the usual rotating hedgehog. | 1993-11-15 | 2014-11-17 | [
"hep-ph"
] | F. M. Steffens and V.E. Herscovitz |
hep-ph/9311294 | On near forward high energy scattering in QCD | We consider elastic quark-quark scattering at high energy and fixed
transferred momentum. Performing factorization of soft gluon exchanges into
Wilson lines vacuum expectation values and studying their properties, we find
that the asymptotics of the scattering amplitude is controlled by the
renormalization properties o... | 1993-11-15 | 2009-10-22 | [
"hep-ph",
"hep-th"
] | G.P.Korchemsky |
hep-ph/9311290 | Dijet Production at Large Rapidity Intervals | We examine dijet production at large rapidity intervals at Tevatron energies,
by using the theory of Lipatov and collaborators which resums the leading
powers of the rapidity interval. We analyze the growth of the Mueller-Navelet
$K$-factor in this context and find it to be negligible. However, we do find a
considerabl... | 1993-11-14 | 2011-05-05 | [
"hep-ph"
] | Vittorio Del Duca and Carl R. Schmidt |
hep-ph/9311289 | 1) Spin and flavor sum rules based on a parton model, 2) SU(2) flavor
breaking in antiquark distributions | 1) We discuss a sum rule of the tensor structure function $b_1(x)$ for
spin-one hadrons along with the Gottfried sum rule. Both sum rules are similar
in the sense that they are phenomenological ones based on a naive parton model.
As the Gottfried sum rule became useful for studying SU(2)$_{flavor}$ breaking
in antiquar... | 1993-11-14 | 2016-09-01 | [
"hep-ph",
"nucl-th"
] | S. Kumano (Dept. of Physics, Saga Univ.) |
hep-ph/9311280 | Transverse Quark Distribution in Mesons - QCD Sum Rule Approach - | QCD sum rules are used to compute the first few moments of the mesonic quark
momentum. Transverse, longitudinal and mixed transverse-longitudinal components
are examined. The transverse size of the pion is shown to be dictated by the
gluon condensate, even though the mass and the longitudinal distribution are
dominated... | 1993-11-12 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Su H. Lee, T. Hatsuda and G. A. Miller |
hep-ph/9311285 | OPE analysis for polarized deep inelastic scattering | We present an explicit OPE analysis for the first moment of $g_1$ up to order
$M^2/Q^2$. This result allows to calculate power corrections to the Bjorken and
Ellis--Jaffe sum rules. | 1993-11-12 | 2009-10-22 | [
"hep-ph"
] | B. Ehrnsperger, L. Mankiewicz, A. Sch\"afer |
hep-ph/9311281 | Flavor Unification and Discrete Nonabelian Symmetries | Grand unified theories with fermions transforming as irreducible
representations of a discrete nonabelian flavor symmetry can lead to realistic
fermion masses, without requiring very small fundamental parameters. We
construct a specific example of a supersymmetric GUT based on the flavor
symmetry $\Delta(75)$ --- a sub... | 1993-11-12 | 2013-11-13 | [
"hep-ph"
] | David B. Kaplan and Martin Schmaltz |
hep-ph/9311283 | Soft Physics and Intermittency: Open Question(s) in Krakow | This contribution contains a summary of the Krakow meeting on Soft Physics
and Fluctuations. It emphasizes both the experimental and the theoretical
investigations on correlations/fluctuations and intermittency in multi-particle
processes and discusses of the present status of this concept. A clarification
of the main ... | 1993-11-12 | 2007-05-23 | [
"hep-ph"
] | R. Peschanski |
hep-ph/9311282 | Top Condensation without Fine-Tuning | Quadratic divergencies which lead to the usual fine-tuning or hierarchy
problem are discussed in top condensation models. As in the Standard Model a
cancellation of quadratic divergencies is not possible without the boson
contributions in the radiative corrections which are absent in lowest order of
an $1/N_c$-expansio... | 1993-11-12 | 2009-10-22 | [
"hep-ph"
] | Andreas Blumhofer |
hep-ph/9311279 | Hypercharge and the Cosmological Baryon Asymmetry | Stringent bounds on baryon and lepton number violating interactions have been
derived from the requirement that such interactions, together with electroweak
instantons, do not destroy a cosmological baryon asymmetry produced at an
extremely high temperature in the big bang. While these bounds apply in
specific models, ... | 1993-11-12 | 2009-10-22 | [
"hep-ph"
] | Aram Antaramian, Lawrence J. Hall, and Andrija Ra\v{s}in |
hep-ph/9311288 | Resolved Photon Contributions to Leptoquark Production in $e^+ e^-$ and
$e\gamma$ Collision | We calculate the resolved photon contribution to leptoquark production at
$e\gamma$ colliders for the center of mass energies $\sqrt s=500$~GeV and
1~TeV. We also calculate the resolved photon contribution to leptoquark
production at $e^+ e^-$ colliders for the center of mass energies $\sqrt{s} =
1$~and~2~TeV. In both ... | 1993-11-12 | 2009-10-22 | [
"hep-ph"
] | Michael A. Doncheski and Stephen Godfrey |
hep-ph/9311284 | Gauge invariant top quark form factors from e+ e- experiments | Motivated by the possibility of experimental determination of top quark form
factors in upcoming e+ e- experiments, as recently discussed by Atwood and
Soni, we show at the one loop level that the conventionally defined magnetic
dipole moment (MDM) form factor of the top quark is gauge dependent, in the
class of renorm... | 1993-11-12 | 2010-11-01 | [
"hep-ph"
] | J. Papavassiliou and C. Parrinello |
hep-ph/9311287 | 1/m_c Expansion of Omega_b -> Omega_c^(*) Semileptonic Decay Form
Factors | A simple model of Omega_Q and Omega_Q^(*) baryons containing one heavy quark
Q is constructed. Amplitudes are represented by loop graphs with one line for
the heavy quark and another for the light degrees of freedom. The latter are
modelled as a freely-propagating vector particle interacting nonlocally with
the heavy b... | 1993-11-12 | 2016-09-01 | [
"hep-ph"
] | M. Sutherland |
hep-ph/9311286 | Lepton Masses Protect the Primordial Baryogenesis from Spaleron erasure | This talk is based on work performed with Graham Ross and is a very concise
summary of our soon to be published paper. Here we present a revision of the
analysis of sphaleron baryon-number violating processes in the standard model
including lepton-mass effects. We find the surprising result that a GUT-scale
matter-asym... | 1993-11-12 | 2007-05-23 | [
"hep-ph"
] | Herbi Dreiner |
hep-ph/9311275 | High $Q^2$ Probe of Nuclear Spectral Function and Color Transparency | Contrary to widespread opinion, color transparency (CT) brings essential
ambiguity to, rather than helps in, study of the nuclear spectral function in
quasielastic lepton scattering, $A(l,l'p)A'$, at high $Q^2$. Although the
nuclear attenuation vanishes, the final state interaction (FSI) of a small-size
ejectile wave p... | 1993-11-11 | 2007-05-23 | [
"hep-ph"
] | Boris Kopeliovich |
hep-ph/9311273 | The Energies of All Hadrons(INCLUDING All Known Resonances) and the
Energies of the Excited States of Quarks | By means of a general classification of the different kinds of matter which
were formed along the universal expansion, the paper shows that the force of
nature form a chain from the world of the prequarks to the galaxies. It is
shown that matter has a generalized structured state characterized by some
degree of order a... | 1993-11-11 | 2007-05-23 | [
"hep-ph"
] | Mario Everaldo de Souza |
hep-ph/9311274 | On the Foundations of Chiral Perturbation Theory | The properties of the effective field theory relevant for the low energy
structure generated by the Goldstone bosons of a spontaneously broken symmetry
are reexamined. It is shown that anomaly free, Lorentz invariant theories are
characterized by a gauge invariant effective Lagrangian, to all orders of the
low energy e... | 1993-11-11 | 2009-10-22 | [
"hep-ph"
] | H. Leutwyler |
hep-ph/9311276 | Heavy diquark effective theory and supersymmetry of hadrons containing a
single heavy quark | A new supersymmetry is proposed for hadrons containing a single heavy quark.
This supersymmetry is based on a new approximation to those hadrons, which we
would consider as a further step beyond the spectator light diquark model of
baryons. The heavy diquark effective theory is constructed by the techniques
introduced ... | 1993-11-11 | 2007-05-23 | [
"hep-ph"
] | Nguyen Ai Viet |
hep-ph/9311270 | SU(3)--Breaking Effects in Axial--Vector Couplings of Octet Baryons | Present evidence on baryon axial--vector couplings is reviewed, the main
emphasis being on internal consistency between asymmetry and rate data. A
complete account of all {\sl small} terms in the Standard Model description of
these latter leads to {\sl both} consistency {\sl and} evidence for breaking of
flavour SU(3) ... | 1993-11-11 | 2007-05-23 | [
"hep-ph"
] | Paolo M. Gensini (Dip. di Fisica dell'Universit\`a di Perugia,
Perugia, Italy, and Sezione di Perugia dell'I.N.F.N., Perugia, Italy) and
Galileo Violini (Dip. di Fisica dell' Universit`a della Calabria, Rende
(Cosenza), Italy, I.N.F.N., Gruppo Collegato di Cosenza, Italy, and Centro
Internacional de F'i sica, S... |
hep-ph/9311269 | The Supersymmetric Particle Spectrum | We examine the spectrum of supersymmetric particles predicted by grand
unified theoretical (GUT) models where the electroweak symmetry breaking is
accomplished radiatively. We evolve the soft supersymmetry breaking parameters
according to the renormalization group equations (RGE). The minimization of the
Higgs potentia... | 1993-11-11 | 2009-09-15 | [
"hep-ph"
] | V. Barger, M. S. Berger, and P. Ohmann |
hep-ph/9311268 | An upper bound on $P$-wave charmonium production via 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... | 1993-11-11 | 2009-09-25 | [
"hep-ph"
] | Howard D. Trottier |
hep-ph/9311271 | Spontaneous CP-Violation in the Extended Standard Models | The spontaneous CP-violation in three kinds of extension of the standard
model are investigated. We find that if no additional symmetry is introduced to
reduce the number of coefficients, then all three extended models possess the
spontaneous CP violation (SCPV) in the Higgs potential. When symmetry under
which the dou... | 1993-11-11 | 2010-11-01 | [
"hep-ph"
] | Chilong Lin, Chien-er Lee, and Yeou-Wei Yang |
hep-ph/9311277 | New Precision Electroweak Tests of SU(5) x U(1) Supergravity | We explore the one-loop electroweak radiative corrections in $SU(5)\times
U(1)$ supergravity via explicit calculation of vacuum-polarization and
vertex-correction contributions to the $\epsilon_1$ and $\epsilon_b$
parameters. Experimentally, these parameters are obtained from a global fit to
the set of observables $\Ga... | 1993-11-11 | 2009-08-25 | [
"hep-ph"
] | J.L.Lopez, D.V.Nanopoulos, G.T.Park, and A.Zichichi |
hep-ph/9311278 | Microphysical Approach to Nonequilibrium Dynamics of Quantum Fields | We examine the nonequilibrium dynamics of a self-interacting $\lambda\phi^4$
scalar field theory. Using a real time formulation of finite temperature field
theory we derive, up to two loops and $O(\lambda^2)$, the effective equation of
motion describing the approach to equilibrium. We present a detailed analysis
of the... | 1993-11-11 | 2009-10-22 | [
"hep-ph",
"gr-qc",
"hep-th"
] | M. Gleiser and R. O. Ramos |
hep-ph/9311272 | Feynman Rules in the Type III Natural Flavour-Conserving Two-Higgs
Doublet Model | We consider a two Higgs-doublet model with $S_3$ symmetry, which implies a
$\pi \over 2$ rather than 0 relative phase between the vacuum expectation
values $<\Phi_1>$ and $<\Phi_2>$. The corresponding Feynman rules are derived
accordingly and the transformation of the Higgs fields from the weak to the
mass eigenstates ... | 1993-11-11 | 2010-11-01 | [
"hep-ph"
] | Chilong Lin, Chien-er Lee, and Yeou-Wei Yang |
hep-ph/9311265 | Model Dependence of $W_R$ Searches at the Tevatron | We explore the sensitivity of the on-going Tevatron search for charged,
right-handed gauge bosons, $W_R^{\pm}$, to various model dependent assumptions
such as the magnitude of the $SU(2)_R$ gauge coupling, the values of the
right-handed Kobayashi-Maskawa mixing matrix elements, $(V_R)_{ij}$, and the
nature of the right... | 1993-11-10 | 2010-11-01 | [
"hep-ph"
] | T.G. Rizzo |
hep-ph/9311263 | Single Top Production at the Next Generation Linear e+e- Colliders | Present limits on the top mass from LEP1 and Tevatron point to a top quark
that is considerably heavier than the $W$ vector boson in the standard model.
Hence, e+e- colliders with \sqrt{s} \simeq 300 GeV (the c.m. energy foreseen at
the first phase of the Next Linear e+e- Collider) could be well below the
energy thresh... | 1993-11-10 | 2009-10-22 | [
"hep-ph"
] | S.Ambrosanio and B.Mele |
hep-ph/9311260 | Large $\pt$ Hadroproduction of Heavy Quarks | The production of heavy quarks at large $\pt$ ($\pt\gg m$) in hadronic
collisions is considered. The analysis is carried out in the framework of
perturbative fragmentation functions, thereby allowing a resummation at the NLO
level of final state large mass logarithms of the kind $\log(\pt/m)$. The case
of $b$-quark pro... | 1993-11-10 | 2009-10-22 | [
"hep-ph"
] | M. Cacciari and M. Greco |
hep-ph/9311259 | Equivalence of Hamiltonian and Lagrangian Path Integral Quantization | The HLE theorem is proven for effective Lagrangians with arbitrary
interactions of scalars, fermions, massless and massive vector bosons. This
theorem states that the correct Hamiltonian path intergral formalism is
equivalent to the convenient Lagrangian path integral ansatz. In particular,
this theorem is valid for ef... | 1993-11-10 | 2009-09-25 | [
"hep-ph",
"hep-th"
] | Carsten Grosse-Knetter |
hep-ph/9311254 | Isoscalar-isovector mass splittings in excited mesons | Mass splittings between the isovector and isoscalar members of meson nonets
arise in part from hadronic loop diagrams which violate the Okubo-Zweig-Iizuka
rule.
Using a model for these loop processes which works qualitatively well in the
established nonets, I tabulate predictions for the splittings and associated
iso... | 1993-11-10 | 2011-07-19 | [
"hep-ph"
] | Paul Geiger |
hep-ph/9311266 | Heavy diquark in baryons containing a single heavy quark and the weak
form factors | It is shown that the number of independent weak form factors collapses if the
heavy diquark exists inside the baryons containing a single heavy quark. The
relations between the weak form factors are quite different in the case of
light diquark. So a careful analysis on the future data of the weak form
factors would cla... | 1993-11-10 | 2009-09-25 | [
"hep-ph"
] | Le Viet Dung and Nguyen Ai Viet |
hep-ph/9311258 | CP Violation in Higgs Decays due to Majorana Neutrinos | The possibility of observing CP violation in the decays of Higgs particles
into top-quark, W- and Z-boson pairs induced by heavy Majorana neutrinos is
discussed. In the context of minimal "see-saw" models with interfamily mixings,
we find that Majorana neutrinos may give rise to sizable CP-odd effects at the
one-loop e... | 1993-11-10 | 2007-05-23 | [
"hep-ph"
] | A. Ilakovac, B.A. Kniehl and A. Pilaftsis |
hep-ph/9311267 | Longevity of the quark-gluon plasma and the mixed phase from intensity
interferometry of high energy photons | Two-photon intensity interferometry is shown to provide an accurate
measurement of lifetime of quark-gluon plasma created in ultra-relativistic
heavy ion collisions via the difference of outward and sidewardcorrelation
radii. Under the assumption of a longitudinal, boost invariant expansion of the
plasma, we obtain ana... | 1993-11-10 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | Dinesh K. Srivastava and Charles Gale |
hep-ph/9311261 | Testing the Higgs system at a photon-photon collider | The level of sensitivity of the processes $\gamma\gamma \to ZZ$,
$\gamma\gamma \to W^+W^-$ and $\gamma\gamma \to t\bar t$ to the Higgs sector of
the Standard Model Lagrangian in the energy region between 200 GeV and 1 TeV is
examined. The elementary Higgs boson is taken to have a mass less than 1 TeV.
Sizeable effects ... | 1993-11-10 | 2009-10-22 | [
"hep-ph"
] | H. Veltman |
hep-ph/9311264 | Nonrelativistic effective Lagrangians | Chiral perturbation theory is extended to nonrelativistic systems with
spontaneously broken symmetry. In the effective Lagrangian, order parameters
associated with the generators of the group manifest themselves as effective
coupling constants of a topological term, which is gauge invariant only up to a
total derivativ... | 1993-11-10 | 2009-10-22 | [
"hep-ph"
] | H. Leutwyler |
hep-ph/9311257 | Probing Lepton Number Violation via Majorana Neutrinos at Hadron
Supercolliders | The possibility of discovering heavy Majorana neutrinos and lepton number
violation via the like sign dilepton signal at hadron super- colliders is
investigated. The cross-sections for the production of these neutrinos singly
as well as in pairs are computed both in three and four generation scenarios
within the framew... | 1993-11-10 | 2009-10-22 | [
"hep-ph"
] | A. Datta, M. Guchait and A. Pilaftsis |
hep-ph/9311256 | Rare $B$-Decays and Heavy to Light Semileptonic Transitions in the Isgur
and Wise Limit | From the experimental branching ratios for $B^- --> \rho^0 l^-\bar\nu_l$ and
$D^+ --> {\overl K}^{*0}({\overl K}^0) e^+ \nu_e$ one finds, in the Heavy Quark
Limit of $HQET$, $ |V_{bu}|=(8.1\pm 1.7) x 10^{-3}$, larger but consistent with
the actual quoted range $(2 - 7) x 10^{-3}$. In the same framework one predicts
for... | 1993-11-10 | 2010-11-01 | [
"hep-ph"
] | Pietro Santorelli (Univ. of Napoli) |
hep-ph/9311255 | On the Q^2 Dependence of Measured Polarized Structure Funtions | We analyse the available data on the polarized asymmetries $A_1$ for proton,
neutron and deuteron targets. We use a homogeneous and updated set of
unpolarized structure functions to derive $g_1$ from $A_1$, and we accurately
correct for the scaling violations in order to obtain $g_1(x,Q^2)$ with the
same $Q^2$ for all ... | 1993-11-10 | 2009-10-22 | [
"hep-ph"
] | G. Altarelli, P. Nason and G. Ridolfi |
hep-ph/9311262 | The Total and Jet Photoproduction Cross Sections at HERA and Fermilab | We present results of calculations of the total and jet photoproduction cross
sections at HERA and Fermilab energies$^1$. The calculations take into account
the high-energy QCD structure of the photon and are performed for different
photon structure functions. We discuss how recent measurements of the total
photoproduc... | 1993-11-10 | 2007-05-23 | [
"hep-ph"
] | Ina Sarcevic |
hep-ph/9311243 | $D_s$ Lifetime, $m_b$, $m_c$ and $|V_{cb}|$ in the Heavy Quark Expansion | We present some straightforward applications of the QCD heavy quark
expansion, stated in previous papers [1-3], to the inclusive widths of heavy
flavour hadrons. We address the question of the $D_s$ lifetime and argue that
-- barring Weak Annihilation (WA) -- $\tau (D_s)$ is expected to exceed $\tau
(D^0)$ by several p... | 1993-11-09 | 2010-11-01 | [
"hep-ph"
] | I.I.Bigi, N.G.Uraltsev |
hep-ph/9311250 | Quark Solitons from Effective Action of QCD | We derive an effective low energy action for QCD in 4 dimensions. The low
energy dynamics is described by chiral fields transforming non-trivially under
both color and flavor. We use the method of anomaly integration from the QCD
action. The solitons of the theory have the quantum numbers of quarks. They are
expected t... | 1993-11-09 | 2009-10-22 | [
"hep-ph"
] | Y. Frishman, A. Hanany and M. Karliner |
hep-ph/9311248 | Detecting Sleptons at Hadron Colliders and Supercolliders | We study the prospects for detecting the sleptons of the Minimal
Supersymmetric Standard Model at hadron colliders and supercolliders. We use
ISAJET 7.03 to simulate charged slepton and sneutrino pair production,
incorporating slepton and sneutrino cascade decays into our analysis. We find
that even with an accumulatio... | 1993-11-09 | 2011-03-17 | [
"hep-ph"
] | H. Baer, C. Chen, F. Paige and X. Tata |
hep-ph/9311252 | RGE Results for Supersymmetric GUTS | The scaling behavior of gauge couplings and fermion Yukawa couplings in the
minimal supersymmetric model is discussed. The relevance of the top quark
Yukawa coupling fixed point in establishing the top quark mass is described.
The evolution of mixing angles is presented. | 1993-11-09 | 2007-05-23 | [
"hep-ph"
] | V. Barger, M. S. Berger, P. Ohmann, and R. J. N. Phillips |
hep-ph/9311247 | Perturbation theory in the nonperturbative QCD vacuum | Perturbative expansion in the nonperturbative confining QCD background is
formulated. The properly renormalized $\alpha_S(R)$ is shown to be finite at
large distances, with the string tension playing the role of an infrared
regulator. The infra--red renormalons are shown to be absent in the new
perturbation series. | 1993-11-09 | 2014-11-17 | [
"hep-ph"
] | Yu.A.Simonov |
hep-ph/9311251 | Yukawa Coupling Evolution In SUSY GUTS | The scaling behavior and fixed points in the evolution of fermion Yukawa
couplings and mixing angles are discussed. The relevance of fixed points in
determining the top quark mass is described. | 1993-11-09 | 2007-05-23 | [
"hep-ph"
] | V. Barger, M. S. Berger, and P. Ohmann |
hep-ph/9311253 | Theory Summary and Future Directions | Summary talk at the Lepton-Photon Symposium, Cornell University, Aug. 10-15,
1993. | 1993-11-09 | 2015-06-25 | [
"hep-ph",
"hep-th"
] | David Gross |
hep-ph/9311246 | Dibaryons as axially symmetric skyrmions | Dibaryons configurations are studied in the framework of the bound state
soliton model. A generalized axially symmetric ansatz is used to determine the
soliton background. We show that once the constraints imposed by the symmetries
of the lowest energy torus configuration are satisfied all spurious states are
removed f... | 1993-11-09 | 2008-02-03 | [
"hep-ph"
] | G.L.Thomas, N.N.Scoccola and A.Wirzba |
hep-ph/9311244 | Qualitons from QCD | Qualitons, topological excitations with the quantum numbers of quarks, may
provide an accurate description of what is meant by constituent quarks in QCD.
Their existence hinges crucially on an effective Lagrangian description of QCD
in which a pseudoscalar colour-octet of fields enters as a new variable. We
show here h... | 1993-11-09 | 2009-10-22 | [
"hep-ph"
] | P.H. Damgaard and R. Sollacher |
hep-ph/9311249 | Moderate Supersymmetric CP Violation | It is well known that supersymmetry (SUSY) gives neutron and electron
electric dipole moments ($d_n$ and $d_e$) which are too large by about
$10^{3}$. If we assume a SUSY model cannot contain fine-tunings or large mass
scales, then one must require that the SUSY breaking mechanism give real soft
breaking parameters, in... | 1993-11-09 | 2010-11-01 | [
"hep-ph"
] | Robert Garisto |
hep-ph/9311245 | Cancellation of Infrared Divergences in QED at Nonzero Temperature | The radiation produced by a classical charged current coupled to a quantized
$A_{\mu}$ is first computed. To each order in $\alpha$, all infrared
divergences cancel between the virtual $\gamma$'s and the real $\gamma$'s that
are absorbed from or emitted into the plasma. When all orders of perturbation
theory are summed... | 1993-11-09 | 2007-05-23 | [
"hep-ph"
] | H. Arthur Weldon |
hep-ph/9311237 | Decisive test of color transparency in exclusive electroproduction of
vector mesons | The exclusive production of vector mesons in deep inelastic scattering is a
hard scattering process with the well controlled size of quark configurations
which dominate the production amplitude. This allows an unambiguous prediction
of color transparency effects in the coherent and incoherent production of
vector meson... | 1993-11-08 | 2012-08-27 | [
"hep-ph",
"nucl-th"
] | B.Z.Kopeliovich, J.Nemchick, N.N.Nikolaev and and B.G.Zakharov |
hep-ph/9311239 | B + L Non-Conservation as a Semi-Classical Process | I discuss the problem of computing B + L violation at high energies as that
of solving classical differential equations. These equations involve boundary
conditions at initial and a final times which are anti-Feynman, and involve
solving non-linear differential equations which are complex, even if the
original Hamilton... | 1993-11-08 | 2010-11-01 | [
"hep-ph"
] | L. McLerran |
hep-ph/9311238 | Color Transparency after the Ne18 and E665 Experiments | The 1993 witnessed two major news in the field of color transparency (CT): i)
no effect of CT was seen in the SLAC NE18 experiment on $A(e,e'p)$ scattering
at virtualities of the exchanged photon $Q^{2} \lsim 7$ GeV$^{2}$, ii) strong
signal of CT was observed in the Fermilab E665 experiment on exclusive
$\rho^{0}$-meso... | 1993-11-08 | 2009-09-25 | [
"hep-ph",
"nucl-th"
] | N.N.Nikolaev and B. G. Zakharov |
hep-ph/9311241 | A Layman's guide to SUSY GUTs | The determination of the most straightforward evidence for the existence of
the Superworld requires a guide for non-experts (especially experimental
physicists) for them to make their own judgement on the value of such
predictions. For this purpose we review the most basic results of Super-Grand
unification in a simple... | 1993-11-08 | 2015-06-25 | [
"hep-ph"
] | J. Lopez, D. Nanopoulos, A. Zichichi |
hep-ph/9311242 | Status of Lattice QCD | Significant progress has recently been achieved in the lattice gauge theory
calculations required for extracting the fundamental parameters of the standard
model from experiment. Recent lattice determinations of such quantities as the
kaon $B$ parameter, the mass of the $b$ quark, and the strong coupling constant
have ... | 1993-11-08 | 2015-06-25 | [
"hep-ph",
"hep-lat"
] | Paul B. Mackenzie |
hep-ph/9311240 | Thermal Self-Energies Near Zero Four-Momentum | (Talk presented at the 3rd Workshop on Thermal Field Theories and Their
Applications, Banff, Canada, August 1993. This is a review of work done with
Peter Arnold, Paulo Bedaque, and Ashok Das.) We demonstrate that one-loop
self-energies at finite temperature have a unique limit as the external
four-momentum goes to zer... | 1993-11-08 | 2007-05-23 | [
"hep-ph"
] | Stamatis Vokos |
hep-ph/9311236 | Soft Fields and Hard Particles in Hot Gauge Plasmas | It is shown that the long wavelength excitations of a quark-gluon plasma may
be described as collective oscillations of self-consistent average fields to
which the plasma particles couple. Their properties are obtained from a set of
coupled mean field and kinetic equations, derived from the general
Dyson-Schwinger equa... | 1993-11-08 | 2007-05-23 | [
"hep-ph"
] | Edmond Iancu |
hep-ph/9311234 | Baryon decuplet mass relations in chiral perturbation theory | Baryon decuplet masses within an $SU(3)_L \times SU(3)_R$ chiral Lagrangian
formalism are found to satisfy four relations at second order in flavor
breaking. As a result, the one-loop corrections from Lagrangian terms up to
first order in flavor breaking are observed to give finite and calculable
corrections to these r... | 1993-11-07 | 2011-07-19 | [
"hep-ph"
] | Richard F. Lebed |
hep-ph/9311235 | Comment on the Average Momentum of Top Quarks in the Threshold Region | The behavior of the momentum distribution of top quarks in the threshold
region is investigated. The qualitative behavior, in particular the dependence
of the average momentum on the strong coupling constant can be understood from
analytical calculations for the Coulomb potential. Ambiguities in the relation
between th... | 1993-11-07 | 2007-05-23 | [
"hep-ph"
] | M. Je\.zabek, J.H. K\"uhn and T. Teubner |
hep-ph/9311228 | The b -> s gamma decay in supergravity with radiatively electroweak
breaking | It is analyzed the branching ratio $B(b\rightarrow s\gamma)$ in the context
of minimal $N=1$ supergravity with radiatively broken electroweak symmetry
group. There is a strong dependence on supersymetric parameters, but
constraints on the charged Higgs mass in non-supersymmetric models are relaxed,
due to large contrib... | 1993-11-05 | 2009-10-22 | [
"hep-ph"
] | Marco Aurelio Diaz |
hep-ph/9311230 | Bounds for Bose-Einstein Correlation Functions | Bounds for the correlation functions of identical bosons are discussed for
the general case of a Gaussian density matrix. In particular, for a purely
chaotic system the two-particle correlation function must always be greater
than one. On the other hand, in the presence of a coherent component the
correlation function ... | 1993-11-05 | 2009-10-22 | [
"hep-ph",
"nucl-th"
] | M. Pl\"umer, L.V. Razumov, R.M. Weiner |
hep-ph/9311229 | Effective action of magnetic monopole in three-dimensional
electrodynamics with massless matter and gauge theories of superconductivity | We compute one-loop effective action of magnetic monopole in
three-dimensional electrodynamics of massless bosons and fermions and find that
it contains an infrared logarithm. So, when the number of massless matter
species is sufficiently large, monopoles are suppressed and in the weak
coupling limit charged particles ... | 1993-11-05 | 2009-10-22 | [
"hep-ph"
] | S. Yu. Khlebnikov |
hep-ph/9311231 | Implications of a Light Gluino | We show that the possibility of having light gluinos is not in conflict with
recent LEP measurements and also that cosmology does not rule it out in any
convincing way. In unified N=1 supergravity models, one expects that also the
"photino" will be light. Moreover it leads to $upper$ limits on the masses of
the other s... | 1993-11-05 | 2009-09-25 | [
"hep-ph"
] | F. De Campos and Jos\'E W. F. Valle |
hep-ph/9311233 | Introduction to $Z_N$ Symmetry in $SU_N$ Gauge Theories at Finite
Temperatures | There have been several talks at this workshop on the physical interpretation
and consequences of the $Z_N$ symmetry which is present in the Euclidean Path
Integral formulation of $SU_N$ Gauge Theories at finite temperature. The
purpose of this paper is to present an introduction to this subject. After a
brief review o... | 1993-11-05 | 2007-05-23 | [
"hep-ph"
] | Nathan Weiss |
hep-ph/9311232 | A Virial Theorem for the Kinetic Energy of a Heavy Quark inside Hadrons | The formalism of the heavy quark effective theory is used to derive the
field-theory analog of the virial theorem, which relates the matrix element of
the kinetic energy of a heavy quark inside a hadron to a matrix element of the
gluon field strength tensor. The existing QCD sum rule calculations of the
kinetic energy ... | 1993-11-05 | 2009-10-22 | [
"hep-ph"
] | Matthias Neubert |
hep-ph/9311226 | Report of the Subgroup on the Top Quark | The top group studied discovery issues as well as measurements to be made at
the Tevatron, the LHC and the SSC. | 1993-11-04 | 2007-05-23 | [
"hep-ph"
] | C.-P. Yuan, L. Nodulman, H. Baer, V. Barger, D.O. Carlson, Chih-Hao
Chen, J.L. Diaz-Cruz, W.S. Hou, G.L. Kane, C. Kao, G.A. Ladinsky, C.S. Li, A.
Pomarol, M.H. Reno, C. Schmidt |
hep-ph/9311227 | New Approach for the Construction of Fermion Mass Matrices in SO(10)
SUSY GUTS | A new procedure is developed which enables one to start from the quark and
lepton mass and mixing data at the low scale and construct mass matrices which
exhibit simple SO(10) structure at the SUSY GUT scale. This approach is applied
to the present data involving quark and charged lepton masses, the CKM mixing
matrix a... | 1993-11-04 | 2010-11-01 | [
"hep-ph"
] | Carl H. Albright and Satyanarayan Nandi |
hep-ph/9311225 | Zeroing In On the Top Quark, LSP and Scalar Higgs Masses | We estimate the top quark, lightest sparticle (LSP) and scalar higgs masses
within a supersymmetric grand unified framework in which $\tan\beta \simeq
m_t/m_b$ and the electroweak symmetry is radiatively broken. The requirement
that the calculated $b$ quark mass lie close to its measured value, together
with the cosmol... | 1993-11-04 | 2011-05-12 | [
"hep-ph"
] | B. Ananthanarayan and Q. Shafi |
hep-ph/9311223 | Unstable Particles and Gauge Invariance | When computing the properties of reactions involving unstable charged
particles care has to be taken to use a gauge invariant amplitude. In this talk
we present methods to (automatically) obtain such an amplitude, both at the
tree level and in one-loop calculations, using only a minimal number of
diagrams. The numerica... | 1993-11-04 | 2007-05-23 | [
"hep-ph"
] | Geert Jan van Oldenborgh |
hep-ph/9311222 | Radiative Electroweak Symmetry Breaking and the Infrared Fixed Point of
the Top Quark Mass | The infrared quasi fixed point solution for the top quark mass in the Minimal
Supersymmetric Standard Model explains in a natural way large values of the top
quark mass and appears as a prediction in many interesting theoretical schemes.
Moreover, as has been recently pointed out, for moderate values of $\tan\beta$,
in... | 1993-11-04 | 2009-09-25 | [
"hep-ph"
] | M. Carena, M. Olechowski, S. Pokorski and C.E.M. Wagner |
hep-ph/9311224 | Why the real time formalism doesn't factorise | We show that in the real time formalism, the generating functional for
thermal Green functions does not factorise. However for most calculations, the
normal real time Feynman rules can still be used to give correct results. | 1993-11-04 | 2007-05-23 | [
"hep-ph"
] | A.C. Pearson |
hep-ph/9311221 | Experimental and Astrophysical Status of Neutrino Masses | The experimental and astrophysical status of neutrino masses is reviewed with
an emphasis on the cosmologically interesting regime. | 1993-11-03 | 2007-05-23 | [
"hep-ph"
] | Georg G. Raffelt |
hep-ph/9311219 | Fermions, Anomaly and Unitarity in High-Energy Electroweak Scattering | We report the "state of the art" of the problem of $B+L$ violation in
high-energy electroweak scatterings. Results of various analyses point toward
(though do not prove rigorously yet) the "half-suppression", i.e., that the
$B+L$ violating cross section remains suppressed at least by the negative
exponent of the single... | 1993-11-03 | 2009-12-10 | [
"hep-ph",
"hep-th"
] | R. Guida, K. Konishi, N. Magnoli |
hep-ph/9311220 | Advantages in Choosing Real Generators for SU(N) | Some results are presented indicating the distinct advantages that accrue
from choosing a real representation for the generators of SU(N) rather than the
usual and more popular Gell-Mann type matrices. A few examples in the context
of quantum chromodynamics are used to serve as illustrations. | 1993-11-03 | 2007-05-23 | [
"hep-ph"
] | A. Kundu, T. De and B. Dutta-Roy |
hep-ph/9311215 | Nonperturbative Corrections to the Heavy Lepton Energy Distribution in
the Inclusive Decays $H_b\ra \tau\bar\nu X.$ | Nonperturbative corrections up to $m_b^{-2}$ to the heavy lepton energy
distributions are investigated in the inclusive semileptonic weak decays of
heavy flavors in QCD. In the case of $B$-meson decays, for $b \ra u\tau\bnu$
transitions they decrease the decay rate by 6\% of its perturbative value,
while for $b \ra c\t... | 1993-11-03 | 2009-10-22 | [
"hep-ph"
] | L. Koyrakh |
hep-ph/9311218 | Marching towards a Theory of Non-leptonic Decays of heavy-Flavour
Hadrons" | Theoretical descriptions for the nonleptonic decays of heavy flavour hadrons
have emerged that incorporate non-perturbative corrections in a systematic way
and are genuinely based on QCD. One can reproduce $\tau (D^+)/\tau (D^0)$,
$BR_{SL}(D^+)$ and $BR_{SL}(D^0)$ as due mainly to destructive interference in
$D^+$ deca... | 1993-11-03 | 2007-05-23 | [
"hep-ph"
] | I.I.Bigi |
hep-ph/9311216 | Nonperturbative Effects in QCD at $T>0$ | The background field formalism is used to implement nonperturbative QCD
contributions into diagrammatic technic at $T>0$. The leading terms both in the
confining and nonconfining phase are identified at large $N_c$ and the
transition temperature is calculated in this limit, which appears to be in good
agreement with th... | 1993-11-02 | 2011-08-11 | [
"hep-ph"
] | Yu.A.Simonov |
hep-ph/9311208 | Large $p_{\perp}$ Exclusive Processes:RECENT Developments | Recent improvements of the hard scattering picture for exclusive reactions,
namely the inclusion of both Sudakov corrections and the intrinsic transverse
momentum dependence of the hadronic wave function, are reviewed. On account of
these improvements the perturbative contribution to the pion's form factor can
be calcu... | 1993-11-02 | 2007-05-23 | [
"hep-ph"
] | P. Kroll |
hep-ph/9311213 | One Loop Multiphoton Helicity Amplitudes | We use the solutions to the recursion relations for double-off-shell fermion
currents to compute helicity amplitudes for $n$-photon scattering and
electron-positron annihilation to photons in the massless limit of QED. The
form of these solutions is simple enough to allow {\it all}\ of the
integrations to be performed ... | 1993-11-02 | 2009-10-22 | [
"hep-ph"
] | Gregory Mahlon |
hep-ph/9311212 | Heavy Flavor Theory: Overview | An introduction to the heavy quark effective theory and its symmetries is
given. Some implications of the heavy quark spin and flavor symmetries are
discussed. Recent results on fragmentation to quarkonium states are reviewed. | 1993-11-02 | 2015-06-25 | [
"hep-ph"
] | Mark B. Wise |
hep-ph/9311211 | The Generalized Simplified Parton Shower Model | We explore the consequences of considering clans real physical objects in the
framework of a generalized version of the Simplified Parton Shower model for a
single jet. We predict that the average number of clans at fixed energy grows
linearly in rapidity and slowly decreases with energy in a fixed rapidity
interval. | 1993-11-02 | 2007-05-23 | [
"hep-ph"
] | R. Ugoccioni, A. Giovannini and S. Lupia |
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