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hep-ph/9410363
Deconfinement and Chiral-Symmetry Restoration in Finite Temperature QCD
QCD sum rules are based on the Operator Product Expansion of current correlators, and on QCD-hadron duality. An extension of this program to finite temperature is discussed. This allows for a study of deconfinement and chiral-symmetry restoration. In addition, it is possible to relate certain hadronic matrix elements t...
1994-10-25
2010-11-01
[ "hep-ph" ]
C. A. Dominguez
hep-ph/9410360
The Three-Loop Free Energy for High-Temperature QED and QCD with Fermions
We compute the free energy density for gauge theories, with fermions, at high temperature and zero chemical potential. Specifically, we analytically compute the free energy through $O(g^4)$, which requires the evaluation of three-loop diagrams. This computation extends our previous result for pure gauge QCD.
1994-10-24
2016-09-01
[ "hep-ph" ]
Peter Arnold and Chengxing Zhai
hep-ph/9410355
A Lattice Study of the Gluon Propagator in the Landau Gauge
We present the results of two high-statistics studies of the gluon propagator in the Landau gauge, at $\beta=6.0$, on different lattice volumes. The dependence of the propagator on the momenta is well described by the expression $G(k^2) = \Big[ M^2+Z\cdot k^2(k^2/ \Lambda^2)^\eta)\Big]^{-1}$. We obtain a precise determ...
1994-10-24
2007-05-23
[ "hep-ph" ]
P. Marenzoni, G. Martinelli, N. Stella, M. Testa
hep-ph/9410359
Sensitivity to properties of the phi-meson in the nucleon structure in the chiral soliton model
The influence of the phi-meson on the nucleon properties in the chiral soliton model is discussed.
1994-10-24
2007-05-23
[ "hep-ph" ]
Nimai C. Mukhopadhyay and L. Zhang
hep-ph/9410356
Two-Loop ${\cal O}(\alpha_s^2)$ Correction to the $H\to b\bar b$ Decay Rate Induced by the Top Quark
We present the two-loop QED and QCD corrections to the $f\bar fH$ Yukawa coupling that are induced by the exchange of a virtual photon or gluon, respectively, with a heavy-fermion loop inserted. As an application, we study the corresponding $\O(\alpha_s^2M_H^2/m_t^2)$ correction to the $H\to b\bar b$ decay rate.
1994-10-24
2009-10-28
[ "hep-ph" ]
Bernd A. Kniehl
hep-ph/9410358
The Bloom-Gilman Duality and Leading Logarithms
The existing inclusive electroproduction data base allow us a look at the issue of the relative behaviors of background and resonance excitations, a part of the Bloom-Gilman duality. These data lack accuracy at high Q^2, but establish PQCD scaling in the resonance region and even allow us a glimpse at the leading logar...
1994-10-24
2007-05-23
[ "hep-ph" ]
Carl E. Carlson and Nimai C. Mukhopadhyay
hep-ph/9410357
CP-Violatiing Asymmetries in $e^+e^-\ra t\bar{t}$ with Longitudinally Polarized Elecrtons
New CP-violating asymmetries of decay leptons in $e^+\,e^-\;\ra\;t\,\bar{t}$, arising from electric and weak dipole couplings of $t\,\bar{t}$ to $\gamma$ and $Z$, are examined in the case of unpolarized and longitudinally polarized electrons. The new asymmetries measured together with the old ones can help to determine...
1994-10-24
2010-11-01
[ "hep-ph" ]
P. Poulose and Saurabh D. Rindani (Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India)
hep-ph/9410351
Leading-Log Effects in the Resonance Electroweak Form Factors
We study log corrections to inelastic scattering at high Bjorken x for Q^2 from 1 to 21 GeV^2. At issue is the presence of log corrections, which can be absent if high x scattering has damped gluon radiation. We find logarithmic correction of the scaling curve extrapolated to low Q^2 improves the duality between it and...
1994-10-23
2014-11-17
[ "hep-ph" ]
Carl E. Carlson and Nimai C. Mukhopadhyay
hep-ph/9410354
Signature of the Intermediate Mass Higgs Boson at the LHC With Flavor Tagging
We revisit the exclusive signature $e^\pm (\mu^\pm) + b\bar b$ in the associated production of the intermediate mass Higgs boson with a $W$ boson. We show that it is feasible to use this signature to identify the Higgs boson in the lower intermediate mass region ($90$ to $130$ GeV) at the LHC with reasonable acceptance...
1994-10-23
2009-09-25
[ "hep-ph" ]
Pankaj Agrawal, David Bowser-Chao, and Kingman Cheung
hep-ph/9410353
Solar Neutrinos and the Principle of Equivalence
We study the proposed solution of the solar neutrino problem which requires a flavor nondiagonal coupling of neutrinos to gravity. We adopt a phenomenological point of view and investigate the consequences of the hypothesis that the neutrino weak interaction eigenstates are linear combinations of the gravitational eige...
1994-10-23
2009-09-25
[ "hep-ph", "astro-ph", "gr-qc" ]
J.N Bahcall, P.I. Krastev and C.N. Leung
hep-ph/9410352
Resonant Neutrino Interactions and Mixing
We investigate the resonant interaction of neutrinos in matter in the presence of mixing. At energies near the W resonance, oscillations are absent; the survival probability of electron antineutrinos is suppressed due to the presence of open inelastic channels.
1994-10-23
2009-10-28
[ "hep-ph" ]
G. Domokos and S. Kovesi-Domokos (Johns Hopkins Univ)
hep-ph/9410350
From $m_{d}=m_{e}$ to Realistic Mass Relations in Quark-Lepton Symmetric Models
In recent years a new potential symmetry of fundamental particle physics has been investigated --- discrete quark-lepton symmetry. When this symmetry is implemented, however, it often leads to either of the unrealistic predictions $m_{u}=m_{e}$ or $m_{d}=m_{e}$. This paper considers two possible ways models based on $m...
1994-10-23
2009-10-28
[ "hep-ph" ]
D. S. Shaw and R. R. Volkas
hep-ph/9410347
Analysis of Transverse Muon Polarization in $K^+\to \pi^0\mu^+\nu$ and $K^+\to \mu^+\nu\gamma$ Decays with Tensor Interactions
The T violating transverse muon polarizations in $K^+\to \pi^0\mu^+\nu$ and $K^+\to \mu^+\nu\gamma$ decays due to tensor interactions are studied. The magnitudes of these polarizations over the allowed phase space are presented.
1994-10-22
2009-10-28
[ "hep-ph" ]
C.Q. Geng and S.K. Lee
hep-ph/9410346
Calculation of Particle Production by Nambu Goldstone Bosons with Application to Inflation Reheating and Baryogenesis
A semiclassical calculation of particle production by a scalar field in a potential is performed. We focus on the particular case of production of fermions by a Nambu-Goldstone boson $\theta$. We have derived a (non)local equation of motion for the $\theta$-field with the backreaction of the produced particles taken in...
1994-10-22
2010-11-01
[ "hep-ph", "astro-ph", "hep-th" ]
Alexandre Dolgov (1,2) and Katherine Freese(1) ((1)Physics Department, University of Michigan Ann Arbor, MI 48109, USA; (2) Permanent Address: ITEP, Moscow, 117259 Russia.)
hep-ph/9410349
Conservation Laws and Sum Rules in the Heavy Quark Limit
In the heavy quark limit, hadrons appear as eigenstates of the light degrees of freedom under the static color field of the heavy quark. In this formalism, the weak form factors appear naturally as the overlaps of the initial and final wavefunctions of the light degrees of freedom, and the Bjorken and Voloshin sum rule...
1994-10-22
2009-10-28
[ "hep-ph" ]
Chi-Keung Chow
hep-ph/9410339
Transverse Lepton Polarization in Polarized W Decays
Calculations of transverse polarization of leptons in the decay $W\rightarrow l\nu$ with polarized $W$'s are presented. Planned accelerators will produce enough $W$'s for observation of the Standard Model contributions to this polarization. One loop corrections to the polarization are given; these are too small to be s...
1994-10-21
2009-10-28
[ "hep-ph" ]
Shao Liu and Myron Bander
hep-ph/9410342
The Higgs sector of a supersymmetric left-right model
We study the symmetry breaking sector of a supersymmetric left-right model based on the gauge group $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$. The explicit mass matrices of neutral, singly charged and doubly charged scalars are constructed. In the minimum the $R$-parity is found to be spontaneously broken. An experiment...
1994-10-21
2009-10-28
[ "hep-ph" ]
Katri Huitu and Jukka Maalampi
hep-ph/9410340
Properties of Factorial Cumulant to Factorial Moment Ratio
It is shown that the ratio of factorial cumulant moments to factorial moments for a multiplicity distribution truncated in the tail reveals oscillations in sign similar to those observed in experimental data. It is suggested that this effect be taken into account in the analysis of data in order to obtain correct physi...
1994-10-21
2008-11-26
[ "hep-ph" ]
R. Ugoccioni, A. Giovannini and S. Lupia
hep-ph/9410348
Single Heavy Lepton Production in High Energy Electron-Positron Collisions
The production and decay of exotic leptons are discussed in the context of the vector singlet, vector doublet and fer\-mion mirror-fer\-mion models, at c.m. energies $\sqrt{s}=190GeV$ (LEP II) and $\sqrt{s}=500GeV$ (NLC). The model dependence of total cross sections and kinematic distributions at these energies is show...
1994-10-21
2009-09-25
[ "hep-ph" ]
F. M. L. Almeida Jr, J. H. Lopes, J. A. Martins Sim\~oes, P. P. Queiroz Filho and A. J. Ramalho
hep-ph/9410341
Transverse Momentum Distributions in Large-rapidity Dijet Production at the Tevatron
In this contribution we examine the transverse momentum distributions in dijet production at large rapidity intervals at the Tevatron, using the BFKL resummation.
1994-10-21
2007-05-23
[ "hep-ph" ]
Vittorio Del Duca and Carl R. Schmidt
hep-ph/9410344
Massive States in Chiral Perturbation Theory
It is shown that the chiral nonanalytic terms generated by $\Delta_{33}$ resonance in the nucleon self-energy is reproduced in chiral perturbation theory by perturbing appropriate local operators contained in the pion-nucleon effective Lagrangian itself.
1994-10-21
2009-10-28
[ "hep-ph" ]
S. Mallik
hep-ph/9410345
Flavor and Spin Contents of the Nucleon in the Quark Model with Chiral Symmetry
A simple calculation in the framework of the chiral quark theory of Manohar and Georgi yields results that can account for many of the ''failures'' of the naive quark model: significant strange quark content in the nucleon as indicated by the value of $\sigma _{\pi N},$ the $\overline{u}$-$\overline{d} $ asymmetry in t...
1994-10-21
2009-09-25
[ "hep-ph" ]
T. P. Cheng and Ling-Fong Li
hep-ph/9410343
Light Gluinos and $\Gamma(Z\rightarrow b\overline{b})$
We discuss the anomaly in the $b$ branching ratio of the $Z$ in the context of the light gluino scenario.
1994-10-21
2015-06-25
[ "hep-ph" ]
L. Clavelli
hep-ph/9410337
Probing Quark Fragmentation Functions for Spin-1/2 Baryon Production in Unpolarized $e^+e^-$ Annihilation
We study the measurement of the quark fragmentation functions for spin-1/2 baryon production ($\Lambda$ and $\bar \Lambda$, in particular) in unpolarized $e^+e^-$ annihilation. The spin-dependent fragmentation functions $\hat g_1(z)$ and $\hat h_1(z)$ can be probed in the process as a result of quark-antiquark spin cor...
1994-10-20
2010-11-01
[ "hep-ph" ]
Kun Chen, Gary R. Goldstein, R. L. Jaffe, and Xiangdong Ji
hep-ph/9410333
Heavy Quarkonium Effective Theory
We formulate a QCD-based effective theory approach to heavy quarkonia-like systems as $\bar{c} c$ and $\bar{b} b$ resonances and $B_c$ states. We apply the method to inclusive decays, working out a few examples in detail.
1994-10-20
2009-10-28
[ "hep-ph" ]
Thomas Mannel and Gerhard A. Schuler
hep-ph/9410332
On the new method of computing two-loop massive diagrams
A recently proposed method of calculating scalar two-loop propagator and vertex functions with massive particles is illustrated with simple examples. A double integral representation is derived with the example of a propagator function. An analogous representation is used to compute the vertex function for space-like e...
1994-10-20
2007-05-23
[ "hep-ph" ]
Andrzej Czarnecki
hep-ph/9410327
Semi-Exclusive Pion Production in Deep-Inelastic Scattering
We calculate azimuthal asymmetries and the Callan-Gross $R$-ratio for semi-exclusive pion production in deep inelastic scattering taking into account higher twist effects. Our results are qualitatively different from the QCD-improved parton model predictions for semi-inclusive deep inelastic scattering.
1994-10-20
2009-10-28
[ "hep-ph" ]
A. Brandenburg, V. V. Khoze and D. M\"uller
hep-ph/9410334
QCD Corrections to Inclusive Distributions of Leptons in Decays of Polarised Heavy Quarks
Compact analytic expressions have been obtained for the first order perturbative QCD corrections to the inclusive spectra of the leptons in the semileptonic decays of polarised heavy quarks. Charmed and beautiful $\Lambda$ baryons from $Z^0$ decays can be viewed as sources of highly polarised charm and bottom quarks. C...
1994-10-20
2007-05-23
[ "hep-ph" ]
Marek Jezabek
hep-ph/9410329
Back-reaction in a cylinder
A system is studied in which initially a strong classical electric field exists within an infinitely-long cylinder and no charges are present. Subsequently, within the cylinder, pairs of charged particles tunnel out from the vacuum and the current produced through their acceleration by the field acts back on the field,...
1994-10-20
2009-10-28
[ "hep-ph", "nucl-th" ]
J.M. Eisenberg
hep-ph/9410330
Status of Higher-Order Corrections in the Standard Electroweak Theory
We review recent theoretical progress in the computation of radiative corrections beyond one loop within the standard model of electroweak interactions, both in the gauge and Higgs sectors. In the gauge sector, we discuss universal corrections of $\O(G_F^2M_H^2M_W^2)$, $\O(G_F^2m_t^4)$, $\O(\alpha_sG_FM_W^2)$, $\O(\alp...
1994-10-20
2015-06-25
[ "hep-ph" ]
Bernd A. Kniehl
hep-ph/9410335
Spin Dependent Structure Functions of Nucleons and Nuclei
We review recent progress in the understanding of the spin structure of the nucleon. For the free nucleon the issues addressed include the status of the Bjorken and Ellis-Jaffe sum-rules and the role of the axial anomaly. We outline recent work connecting the quark models familiar from hadron spectroscopy to the spin a...
1994-10-20
2015-06-25
[ "hep-ph", "nucl-th" ]
A.W. Thomas
hep-ph/9410338
Application of the Background-Field Method to the electroweak Standard Model
Application of the background-field method yields a gauge-invariant effective action for the electroweak Standard Model, from which simple QED-like Ward identities are derived. As a consequence of these Ward identities, the background-field Green functions are shown to possess very desirable theoretical properties. The...
1994-10-20
2009-10-28
[ "hep-ph", "hep-th" ]
A. Denner, S. Dittmaier and G. Weiglein
hep-ph/9410331
Signatures of Virtual LSPs at the Tevatron
Relatively light sneutrinos which are experimentally allowed and are not theoretically disfavoured may significantly affect the currently popular search strategies for supersymmetric particles by decaying dominantly into an invisible channel. In certain cases the second lightest neutralino may also decay invisibly lead...
1994-10-20
2019-08-17
[ "hep-ph" ]
A.Datta, S.Chakravarti and M.Guchait
hep-ph/9410336
Neutrinos interacting with Polarizable Media
We study Cherenkov and transition radiation of neutral spin 1/2 particles which carry magnetic moments or electric dipole moments. In particular, we estimate the radiation caused by the solar neutrino flux in dielectric media.
1994-10-20
2007-05-23
[ "hep-ph" ]
W. Grimus and H. Neufeld
hep-ph/9410320
Particle Conjugation and the $1/N_C$ Corrections to $g_A$
We impose the requirement that the isovector axial vector current for the soliton sector of the chiral quark model transforms correctly under particle conjugation. This forces us to choose an otherwise arbitrary ordering of collective space operators in such a way that the next--to--leading $1/N_C$ correction to $g_A$ ...
1994-10-19
2015-06-25
[ "hep-ph" ]
J. Schechter and H. Weigel
hep-ph/9410319
Two-Loop $ O(\alpha_sG_Fm_t^2)$ Correction to the $H\to b\bar b$ Decay Rate
We present the two-loop ${\cal O}(\alpha_sG_Fm_t^2)$ correction to the $b\bar b$ decay rate of the Stan\-dard-Model Higgs boson, assuming that the $t$ quark is much heavier than the Higgs boson. Apart from the universal correction connected with the renormalizations of the wave function and the vacuum expectation value...
1994-10-19
2009-10-28
[ "hep-ph" ]
Bernd A. Kniehl and Michael Spira
hep-ph/9410321
Resolving Ordering Ambiguities in the Collective Quantization by Particle Conjugation Constraints
We formulate the particle conjugation operation and its convenient realization as $G$--parity in the framework of several chiral soliton models. The Skyrme model, the Skyrme model with vector mesons and the chiral quark model are specifically treated. The vector and axial vector currents are classified according to the...
1994-10-19
2009-10-28
[ "hep-ph" ]
J. Schechter and H. Weigel
hep-ph/9410328
Searching for the Quark-Gluon Plasma
The claims for production of high energy densities and possible new states of matter in collisions of nuclei by George F. Bertsch (Science, {\bf 265} (1994) 480-481) are examined and compared with simple explanations of the data which have appeared in the literature.
1994-10-19
2007-05-23
[ "hep-ph" ]
Sherman Frankel
hep-ph/9410325
Quantum Defects and the Long-Term Behavior of Radial Rydberg Wave Packets
We show that a theoretical description of radial Rydberg wave packets in alkali-metal atoms based solely on hydrogenic wave functions and energies is insufficient to explain data that could be obtained in pump-probe experiments with current technology. The modifications to long-term revival times induced by quantum def...
1994-10-19
2009-09-25
[ "hep-ph" ]
Robert Bluhm and Alan Kostelecky
hep-ph/9410314
The Charm Physics Potential of a Tau-Charm Factory
The charm physics program accessible to a Tau-Charm Factory is summarized. Semileptonic, leptonic, hadronic, rare and forbidden charm decay modes are discussed, as well as \dmix\ mixing and CP violation in the charm sector. The theoretical expectations in the Standard Model and beyond as well as the experimental capabi...
1994-10-19
2009-09-25
[ "hep-ph" ]
J.L. Hewett
hep-ph/9410324
What can a relativistic quark model tell us about charmed mesons?
A relativistic quark model is extended to incorporate chiral and gauge symmetries. We obtain the DD*pi and DD*gamma couplings and find that the ratio Gamma(D*0->D0pi0)/Gamma(D*0->D0gamma) constrains the charm-quark mass close to 1.45 GeV. Large 1/mc corrections appear in the heavy-quark contribution to the DD*gamma cou...
1994-10-19
2009-10-28
[ "hep-ph" ]
M. Sutherland, B. Holdom, S. Jaimungal and Randy Lewis
hep-ph/9410318
Ioffe-time distributions instead of parton momentum distributions in description of deep inelastic scattering
We argue that parton distributions in coordinate space provide a more natural object for nonperturbative methods compared to the usual momentum distributions in which the physics of different longitudinal distances is being mixed. To illustrate the advantages of the coordinate space formulation, we calculate the coordi...
1994-10-19
2009-10-28
[ "hep-ph" ]
V. Braun, P. G\'ornicki and L. Mankiewicz
hep-ph/9410317
The direct calculation of the slope of the QCD pomeron's trajectory
We demonstrate that the diffraction slope of the generalized BFKL pomeron amplitude has the conventional Regge growth $B(s) = B(0) + 2\alpha_{\Pom}'\log(s)$. This proves that the generalized BFKL pomeron is described by the moving $j$-plane singularity. We give an estimate for the slope $\alpha_{\Pom}'$ in terms of the...
1994-10-19
2009-09-25
[ "hep-ph" ]
N.N.Nikolaev, B.G.Zakharov and V.R.Zoller
hep-ph/9410316
What one can learn about the QCD parton cascades studying the multiplicity distributions at HERA ?
New properties of the multiplicity distributions predicted by higher order QCD and their physical origin are discussed briefly. Several studies which can be performed at HERA are proposed.
1994-10-19
2009-09-25
[ "hep-ph" ]
B. B. Levchenko (INP MSU Moscow)
hep-ph/9410323
Gluonic Excitations in Heavy Mesons and their Decay by Flux-Tube Breaking
We have examined decays of low-lying gluonic excitations of mesons (hybrids) by chromoelectric flux-tube breaking. An analytical calculation of non-relativistic flux-tube model decay amplitudes is performed in an harmonic oscillator approximation. Specific decay signatures of all $J^{PC}$ charmonium hybrids are identif...
1994-10-19
2008-02-03
[ "hep-ph" ]
Philip R. Page
hep-ph/9410326
Mass Matrix Textures From Superstring Inspired SO(10) Models
We give a general prescription for deriving quark and lepton mass matrices with ``texture'' zeros in the framework of superstring inspired $SO(10)$ models. The key to our approach is a new way to naturally implement the doublet--triplet splitting which enables us to obtain symmetric quark and lepton mass matrices which...
1994-10-19
2011-05-12
[ "hep-ph" ]
K.S. Babu and R.N. Mohapatra
hep-ph/9410322
Reconciling the LEP and Slac Measurements of Sin^2(\Theta_W)
We consider whether a discrepancy between the SLAC and LEP measurements of $\Sw$ can be explained by new physics. We find that only the contribution of a new neutral gauge boson, $Z^\prime$, nearly degenerate with the Z can affect the SLAC measurement while leaving the LEP observables almost unaffected. We briefly disc...
1994-10-19
2009-10-28
[ "hep-ph" ]
F.Caravaglios and G.G.Ross
hep-ph/9410309
Hard photon production rate of a quark-gluon plasma at finite quark chemical potential
We compute the photon production rate of a quark-gluon plasma (QGP) at finite quark chemical potential $\mu $ using the Braaten-Pisarski method, thus continuing the work of Kapusta, Lichard, and Seibert who did the calculation for $\mu =0$.
1994-10-18
2009-10-28
[ "hep-ph" ]
C.T. Traxler, H. Vija, and M.H. Thoma
hep-ph/9410315
Confinement, Crossing Symmetry, and Glueballs
We suggest that the quark-confining force is related by crossing symmetry to a color-singlet glueball ${\cal G}$ which is well described as a loop of one quantum of color magnetic flux. Electron pair annihilation as high as $\approx 2 GeV$ above the $\Upsilon$ mass could produce $\Upsilon \rightarrow \ell^+\ell^-$ acco...
1994-10-18
2008-11-26
[ "hep-ph", "nucl-th" ]
Alfred S. Goldhaber and T. Goldman
hep-ph/9410312
Possible Puzzles in Nonleptonic B Decays
I discuss the recent controversy over the semileptonic branching ratio of the $B$ meson, pointing out that it is only the combination of this quantity with the reported charm multiplicity in $B$ decays which is in serious conflict with theoretical calculations. I consider possible solutions to the problem. (Invited tal...
1994-10-18
2008-02-03
[ "hep-ph" ]
Adam F. Falk
hep-ph/9410306
Partons and Black Holes
A light-front renormalization group analysis is applied to study matter which falls into massive black holes, and the related problem of matter with transplankian energies. One finds that the rate of matter spreading over the black hole's horizon unexpectedly saturates the causality bound. This is related to the transv...
1994-10-18
2007-05-23
[ "hep-ph", "hep-th" ]
L. Susskind and P. Griffin
hep-ph/9410311
Supersymmetric Electroweak Renormaliztion of the Z-Width in the MSSM (II)
We address the computation of \Gamma_Z and of the intriguing quantity R_b in the MSSM including full treatment of the Higgs sector. For a pseudoscalar Higgs mass m_{A^0}>70\,GeV and CDF limits on m_t, the bounds on R_b at 1\sigma level leave no room to the MSSM to solve the `R_b crisis' for any combination of the param...
1994-10-18
2009-10-28
[ "hep-ph" ]
D. Garcia, R. A. Jimenez and J. Sola
hep-ph/9410310
Supersymmetric Electroweak Renormalization of the Z-Width in the MSSM (I)
Within the framework of the MSSM, we compute the complete set of electroweak one-loop supersymmetric quantum effects on the width $\Gamma_Z$ of the $Z$-boson in the on-shell renormalization scheme. Numerical analyses of the corrections to the various partial widths into leptons and quarks are presented. On general grou...
1994-10-18
2009-10-28
[ "hep-ph" ]
D. Garcia, R. A. Jimenez and J. Sola
hep-ph/9410313
A Model of Mesons based on $\chi$SB in the Light-Front Frame
Spontaneous breaking of chiral symmetry is discussed in the light-cone framework. The essential ingredient is an infinite number of constituents near zero light-cone momentum. These high (light-cone) energy degrees of freedom freeze out and leave behind some explicit symmetry breaking in the low (light-cone) energy eff...
1994-10-18
2007-05-23
[ "hep-ph" ]
L. Susskind and M. Burkardt
hep-ph/9410308
Radiative QCD Corrections: A Personal Outlook
We describe several problems related to the studies of the effects of radiative QCD corrections in the phenomenological and theoretical considerations thus summarizing the work of the QCD part of the Symposium on "Radiative Corrections: Status and Outlook".
1994-10-18
2009-09-25
[ "hep-ph" ]
Andrei L. Kataev
hep-ph/9410307
Effects of Top Compositeness
We investigate the effects of top quark compositeness on various physical parameters, and obtain lower limits on the compositeness scale from electroweak precision data. We consider corrections to top quark decay rates and other physical processes. Our results depend sensitively on whether the left-handed top is compos...
1994-10-17
2009-09-11
[ "hep-ph" ]
Howard Georgi, Lev Kaplan, David Morin, Andreas Schenk
hep-ph/9410301
Next-to-leading prediction of $\epse$: an upgraded analysis
We present an updated theoretical prediction of $\epse$, using the next-to-leading $\DSone$ effective hamiltonian and lattice QCD matrix elements. The CP violating phase is costrained by using both the experimental values of $\ep$ and $x_d$, assuming the theoretical determination of $f_B$. Predictions of $\cos\delta$ a...
1994-10-17
2009-09-25
[ "hep-ph" ]
M. Ciuchini
hep-ph/9410299
Recent Progress in the Theory of Heavy Quark and Quarkonium Production in Hadronic Collisions
We review heavy quark and quarkonium production in high energy hadronic collisions. We discuss the status of the theoretical calculations and their uncertainties. We then compare the current theoretical results with the most recent measurements from the tevatron collider experiments.
1994-10-17
2009-09-25
[ "hep-ph" ]
Michelangelo MANGANO
hep-ph/9410300
$B \rightarrow X_s\,\gamma$ and $B \rightarrow K^*\,\gamma$ in the standard and 2H models
Theoretical predictions for the branching ratios of the $B \rightarrow X_s\,\gamma$ and $B \rightarrow K^*\,\gamma$ decays are calculated in the Standard Model and in the (type II) two-Higgs-doublet model. Both the complete leading and the partially known next-to-leading order QCD corrections are included. The uncertai...
1994-10-17
2009-09-25
[ "hep-ph" ]
M. Ciuchini
hep-ph/9410304
Meson-Photon Transition Form Factors
We report results on the $\pi$-$\gamma$ transition form factor obtained within the hard scattering approach including transverse momentum effects and Sudakov corrections. The results clearly favor distribution amplitudes close to the asymptotic form, $\sim x_1x_2$, and disfavor distribution amplitudes which are strongl...
1994-10-17
2009-09-25
[ "hep-ph" ]
R. Jakob, P. Kroll, M. Raulfs
hep-ph/9410303
Energy dependence of source geometry and chaoticity in hadronic collisions from Bose-Einstein correlations
We compare and analyse Bose-Einstein correlation data for $\pi^+ p$ and $K^+ p$ collisions at $\sqrt{s}=22\ GeV$ obtained by the NA22-Collaboration and data for $p\bar{p}$ collisions at $\sqrt{s}=630\ GeV$ obtained by the UA1-Minimum-Bias-Collaboration. Using a parametrization for a longitudinally expanding source, we ...
1994-10-17
2008-02-03
[ "hep-ph" ]
I.V. Andreev, M. Pl\"umer, B.R. Schlei and R.M. Weiner
hep-ph/9410302
Consistency of the Chiral Pion-Pion Scattering Amplitudes with Axiomatic Constraints
The pion-pion scattering amplitudes provided by second-order chiral perturbation theory are confronted with known rigorous constraints derived from the axioms of quantum field theory. We mainly test constraints restricting the $\pi^0$-$\pi^0$ $S$- and $D$-wave amplitudes in the unphysical interval $0\leq s\leq 4m_\pi^2...
1994-10-17
2009-10-28
[ "hep-ph" ]
B. Ananthanarayan, D. Toublan and G. Wanders
hep-ph/9410305
Multiparticle Production and Statistical Analogies
The study of the singularities and zeros of the generating functions of multiplicity distributions is advocated. Some hints from well known probability distributions and experimental data are given. The statistical mechanics analogies provoke to look for a signature of phase transitions. The program of further experime...
1994-10-17
2007-05-23
[ "hep-ph" ]
I.M. Dremin
hep-ph/9410296
Estimating Condensates from the Difference of Tau Branching Fractions
The difference of tau partial decay widths into even and odd number of pions may be considered as another important constraint on the hadronic spectral function, in addition to four classic sum rules of current algebra. Within certain reasonable assumptions its value may be used to test the factorization hypothesis and...
1994-10-16
2009-10-28
[ "hep-ph" ]
Vakhtang Kartvelishvili and Murman Margvelashvili (High Energy Physics Institute, Tbilisi State University, GE-380086, Tbilisi, Georgia)
hep-ph/9410297
The Isgur-Wise function in a relativistic model for $q\bar Q$ system
We use the Dirac equation with a ``(asymptotically free) Coulomb + (Lorentz scalar) linear '' potential to estimate the light quark wavefunction for $ q\bar Q$ mesons in the limit $m_Q\to \infty$. We use these wavefunctions to calculate the Isgur-Wise function $\xi (v.v^\prime )$ for orbital and radial ground states in...
1994-10-16
2010-11-01
[ "hep-ph" ]
Mohammad R. Ahmady, Roberto R. Mendel and James D. Talman
hep-ph/9410298
A Detailed Analysis of a Modified Fritzsch Scheme of Quark Mass Matrices
We investigate in detail a modified version of the Fritzsch scheme where the diagonal entries $(M_{u,d})_{22}$ are introduced as free parameters instead of being zero. We find that $(M_u)_{22}$ and $(M_d)_{22}$ are restricted to l in the range $m_u-m_c\leq (M_u)_{22}< m_t-m_c$ and $m_d-m_s\leq (M_d)_{22}< m_b-m_s$. In ...
1994-10-16
2007-05-23
[ "hep-ph" ]
E. Boridy, C. Hamzaoui, F. Lemay and J. Lindig
hep-ph/9410285
Supersymmetry
I review phenomenologically interesting aspects of supersymmetry. First I point out that the discovery of the positron can be regarded as a historic analogue to the would-be discovery of supersymmetry. Second I review the recent topics on the unification of the gauge coupling constants, $m_b$--$m_\tau$ relation, proton...
1994-10-14
2007-05-23
[ "hep-ph" ]
Hitoshi Murayama (LBL)
hep-ph/9410287
Perturbative QCD
This is the written version of a set of lectures on perturbative QCD that were delivered to a mixed audience of young theorists and experimentalists in the course of the XXII International Meeting on Fundamental Physics. These notes are virtually a verbatim transcription of the lectures. The selection of topics is some...
1994-10-14
2007-05-23
[ "hep-ph" ]
D.Espriu
hep-ph/9410295
The Electroweak Phase Transition, Part 2: $\epsilon$-Expansion Results
Talk presented at the conference Quarks `94: Vladimir, Russia. I summarize the application of $\epsilon$-expansion methods to the electroweak phase transition. Results from both leading and next-to-leading order calculations are discussed.
1994-10-14
2009-09-25
[ "hep-ph" ]
Laurence Yaffe
hep-ph/9410290
The Structure of a Source from Interferometry Measurements in Heavy Ion Collisions
Some experimental results of correlation functions in Bose-Einstein interferometry measurements exhibit a non smooth behaviour - oscillations. Possible origin of such a behaviour in non-trivial spatial distribution of the source is considered. A method for obtaining additional information about the structure of source ...
1994-10-14
2009-09-25
[ "hep-ph" ]
Peter Filip
hep-ph/9410283
Impact of R-Parity Violation on Supersymmetry Searches at the Tevatron
We evaluate cross sections for $\eslt$, 1$\ell$ and various dilepton and multilepton event topologies that result from the simultaneous production of all sparticles at the Tevatron collider, both within the minimal model framework as well as in two different $R$-parity violating scenarios. Our analysis assumes that the...
1994-10-14
2009-10-28
[ "hep-ph" ]
H. Baer, C. Kao and X. Tata
hep-ph/9410294
The Electroweak Phase Transition, Part 1: Review of Perturbative Methods
Talk presented at the conference Quarks `94: Vladimir, Russia. I review the successes and limitations of standard perturbative methods for studying the order and strength of the electroweak phase transition.
1994-10-14
2007-05-23
[ "hep-ph" ]
Peter Arnold
hep-ph/9410288
Studying Structure of Electroweak Corrections
Several different effects in electroweak quantum corrections are explored separately through the latest data on the weak-boson masses. The leading-log approximation, the improved-Born approximation and the non-decoupling top-quark effects are studied without depending on the recent CDF data of $m_t$, and the results ar...
1994-10-14
2015-06-25
[ "hep-ph" ]
Zenr\=o Hioki
hep-ph/9410289
Towards a Model Independent Analysis of Rare $B$ Decays
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 distributions in these processes would allow us to extract the magnitude and sign of the dominant Wilson coef...
1994-10-14
2009-10-28
[ "hep-ph" ]
Ahmed Ali, Gian Giudice, Thomas Mannel
hep-ph/9410284
Probing Supergravity Models with Indirect Experimental Signatures
We explore the one-loop electroweak radiative corrections in the context of the traditional minimal $SU(5)$ and the string-inspired $SU(5)\times U(1)$ supergravity models by calculating explicitly vacuum-polarization and vertex-correction contributions to the $\epsilon_1$ and $\epsilon_b$ parameters. We also include in...
1994-10-14
2009-11-05
[ "hep-ph" ]
Jihn E. Kim and Gye T. Park
hep-ph/9410286
Chiral Symmetry Breaking in Quenched Massive Strong-Coupling QED$_4$
We present results from a study of subtractive renormalization of the fermion propagator Dyson-Schwinger equation (DSE) in massive strong-coupling quenched QED$_4$. Results are compared for three different fermion-photon proper vertex {\it Ans\"{a}tze\/}: bare $\gamma^\mu$, minimal Ball-Chiu, and Curtis-Pennington. The...
1994-10-14
2016-09-01
[ "hep-ph" ]
Frederick T. Hawes and Anthony G. Williams
hep-ph/9410293
Calculation of 1/m^3 terms in the total semileptonic width of D mesons.
We calculate the 1/$m^3_c$ corrections in the inclusive semileptonic widths of $D$ mesons. We show that these are due to the novel penguin type operators that appear at this level in the transition operator. Taking into account the nonperturbative corrections leads to the predicted value of the semileptonic width signi...
1994-10-14
2009-10-28
[ "hep-ph" ]
B. Blok, R. Dikeman and M. Shifman
hep-ph/9410292
What does the CCFR measurement of the Gross--Llewelyn Smith sum rule tell us?
Recently the CCFR Collaboration reported the measurement of the Gross--Llewellyn Smith sum rule %at $Q^2=3\; \mr{GeV}^2$: $\int^{1}_{0}\mr{d}F_{3}^{\nu p+\bare{\nu}p}(x,Q^2=3\;\mr{GeV}^2)= 2.50\pm 0.018(\mr{stat})$. Subsequently Kataev and Sidorov analyzed the $Q^2$--dependence of this sum rule and pointed out a discre...
1994-10-14
2016-08-14
[ "hep-ph" ]
J.Ch\'yla and J. Rame\v{s}
hep-ph/9410276
Instability of a Nielsen-Olesen Vortex Embedded in the Electroweak Theory: I. the Single-Component Higgs Gauge
The stability of an abelian (Nielsen-Olesen) vortex embedded in the electroweak theory against W production is investigated in a gauge defined by the condition of a single-component Higgs field. The model is characterized by the parameters $\beta=({M_H\over M_Z})^2$ and $\gamma=\cos^2\theta_{\rm w}$ where $\theta_{\rm ...
1994-10-13
2007-05-23
[ "hep-ph" ]
Samuel W. MacDowell and Ola T\"ornkvist
hep-ph/9410278
Right Handed Weak Currents in Sum Rules for Axialvector Constant Renormalization
The recent experimental results on deep inelastic polarized lepton scattering off proton, deuteron and $^{3}$He together with polari% zed neutron $\beta$-decay data are analyzed. It is shown that the problem of Ellis-Jaffe and Bjorken sum rules deficiency and the neutron paradox could be solved simultaneously by assumi...
1994-10-13
2009-10-28
[ "hep-ph", "nucl-th" ]
N.B.Shul'gina (The Niels Bohr Institute, Permanent address: The Kurchatov Institute, Moscow)
hep-ph/9410277
New physics motivated by the low energy approach to electric charge quantization
The low-energy approach to electric charge quantization predicts physics beyond the minimal standard model. A model-independent approach via effective Lagrangians is used examine the possible new physics, which may manifest itself indirectly through family-lepton--number violating rare decays.
1994-10-13
2009-10-28
[ "hep-ph" ]
H. Lew and R. R. Volkas
hep-ph/9410279
Pomeron with a Running Coupling Constant: Intercept and Slope
The equation for two reggeized gluons with a running QCD coupling constant, proposed earlier on the basis of the bootstrap condition, is investigated by the variational technique in the vacuum channel. The pomeron intercept and slope are calculated as a function of the infrared cutoff parameter $m$ ("the gluon mass"). ...
1994-10-13
2009-10-28
[ "hep-ph" ]
M. A. Braun
hep-ph/9410280
$D^*D\pi$ and $B^*B\pi$ couplings in QCD
We calculate the $D^*D\pi$ and $B^*B\pi$ couplings using QCD sum rules on the light-cone. In this approach, the large-distance dynamics is incorporated in a set of pion wave functions. We take into account two-particle and three-particle wave functions of twist 2, 3 and 4. The resulting values of the coupling constants...
1994-10-13
2014-11-17
[ "hep-ph" ]
V.M. Belyaev, V.M. Braun, A. Khodjamirian and R. R\"uckl
hep-ph/9410275
Radiative Corrections to the Higgs Boson Decay into a Longitudinal $W$-Boson Pair in a Two-Doublet Model
The decay rate of a (neutral) Higgs boson ($H$) going into a longitudinal $W$-boson pair is calculated by including one loop radiative corrections in a two-Higgs doublet model. It is assumed that the Higgs boson $H$ is much heavier than the $W$ boson and a full use has been made of the equivalence theorem. A possibil...
1994-10-13
2014-11-17
[ "hep-ph" ]
Shinya Kanemura and Takahiro Kubota
hep-ph/9410282
Non-local Electroweak Baryogenesis Part II : The Classical Regime
We investigate baryogenesis at a first order electroweak phase transition in the presence of a CP violating condensate on the bubble walls, in the regime in which the bubble walls are `thick', in the sense that fermions interact with the plasma many times as the bubble wall passes. Such a condensate is present in multi...
1994-10-13
2019-08-15
[ "hep-ph", "astro-ph" ]
Michael Joyce, Tomislav Prokopec, Neil Turok
hep-ph/9410281
Non-local Electroweak Baryogenesis Part I : Thin Wall Regime
We investigate `non-local' schemes for baryogenesis at a first order electroweak phase transition, in which the effects of a $CP$ violating condensate on the bubble wall propagate into the unbroken phase where the sphaleron rate is unsupressed. Such a condensate exists in multi-Higgs extensions of the standard model, a...
1994-10-13
2019-08-15
[ "hep-ph", "astro-ph" ]
Michael Joyce, Tomislav Prokopec, Neil Turok
hep-ph/9410272
Direct calculation of the triple-pomeron coupling for diffractive DIS and real photoproduction
We present a unified direct calculation of the triple-pomeron coupling $A_{3\Pom}(Q^{2})$ for diffractive real photoproduction ($Q^{2}=0$) and deep inelastic scattering at large $Q^{2}$ in the framework of the dipole approach to the generalized BFKL pomeron. The small phenomenological value of $A_{3\Pom}(0)\approx 0.16...
1994-10-12
2009-09-25
[ "hep-ph" ]
M.Genovese, N.N.Nikolaev and B.G.Zakharov
hep-ph/9410269
Neutron Electric Dipole Moment under Non-Universal Soft SUSY Breaking Terms
The electric dipole moment of the neutron (EDMN) is re-examined in a general framework of the soft supersymmetry breaking. We point out some features of the relation between the EDMN and non-universal soft supersymmetry breaking terms. We give the constraints on the soft scalar masses and the soft CP phases, which have...
1994-10-12
2010-11-01
[ "hep-ph" ]
T.Kobayashi, M.Konmura, D.Suematsu, K.Yamada and Y.Yamagishi
hep-ph/9410268
QCD and Jet Physics
The current status of the QCD coupling constant $\alpha_S$ and experimental and theoretical studies of hadronic jets are reviewed.
1994-10-12
2007-05-23
[ "hep-ph" ]
B R Webber
hep-ph/9410267
The heavy top quark in the two Higgs doublet model
Constraints on the two Higgs doublet model are presented, assuming a top mass of 174 $\pm$ 17 GeV. We concentrate primarily on the ``type II'' model, where up--type quarks receive their mass from one Higgs doublet, and down--type quarks receive their mass from the second doublet. High energy constraints derived from th...
1994-10-12
2010-11-01
[ "hep-ph" ]
Aaron K. Grant
hep-ph/9410270
Table of Running Quark Mass Values : 1994
Running quark mass values $m_q(\mu)$ at some typical energy scales ($\mu=1$ GeV, $\mu=m_W$, and so on) are reviewed. The values depend considerably on the value of $\Lambda_{\overline{MS}}$, especially, the value of top quark mass at $\mu=1$ GeV does so. The relative ratios of light quark masses ($m_u$, $m_d$ and $m_s$...
1994-10-12
2008-02-03
[ "hep-ph" ]
Yoshio Koide
hep-ph/9410273
Diffractive DIS from the generalized BFKL pomeron. Predictions for HERA
We present microscopic QCD calculation of the cross section of diffractive DIS and of the partonic structure of the pomeron from the dipole approach to the generalized BFKL pomeron. We show that the pomeron can not be treated as a particle with uniquely defined structure function and flux in the proton. We find strong ...
1994-10-12
2009-09-25
[ "hep-ph" ]
M.Genovese, N.N. Nikolaev and B.G. Zakharov
hep-ph/9410271
Instanton-induced production of QCD jets
We consider the instanton contributions for the production of a gluon jet with large transverse momentum in QCD. We find that Mueller's corrections corresponding to the rescattering of hard quanta are likely to remove contributions of large instantons, making this cross section well defined. This observation generalize...
1994-10-12
2009-10-28
[ "hep-ph" ]
I.I. Balitsky and V.M. Braun
hep-ph/9410274
A QCD Analysis of the Mass Structure of the Nucleon
{}From the deep-inelastic momentum sum rule and the trace anomaly of the energy-momentum tensor, I derive a separation of the nucleon mass into the contributions of the quark and gluon kinetic and potential energies, the quark masses, and the trace anomaly.
1994-10-12
2009-10-28
[ "hep-ph", "hep-th" ]
Xiangdong Ji
hep-ph/9410260
Tau Decays into Four Pions
We compute branching ratios and invariant mass distributions of the tau decays into four pions. The hadronic matrix elements are obtained by starting from the structure of the hadronic current in chiral limit and then implementing low-lying resonances in the different channels. Reasonable agreement with experiment is o...
1994-10-11
2009-09-25
[ "hep-ph" ]
R. Decker, M. Finkemeier, P. Heiliger and H.H. Jonsson
hep-ph/9410259
Reconciling Cold Dark Matter with COBE/IRAS Plus Solar and Atmospheric Neutrino Data
We present a model where an unstable MeV Majorana tau \neu can naturally reconcile the cold dark matter model (CDM) with cosmological observations of large and small scale density fluctuations and, simultaneously, with data on solar and atmospheric neutrinos. The solar \neu deficit is explained through long wavelength,...
1994-10-11
2009-09-25
[ "hep-ph", "astro-ph" ]
Anjan S. Joshipura and Jose W. F. Valle
hep-ph/9410264
QCD Phase Transition in Hot Hadronic Matter
We analyse the QCD chiral phase transition in the nonlinear and linear $\sigma$-model. The strategy is the same in both cases. We fix the parameters of the effective meson theory at temperature $T=0$ and extrapolate the models to temperatures in the vicinity of the phase transition. The linear $\sigma$-model in $SU(3)\...
1994-10-11
2009-09-25
[ "hep-ph" ]
H.J.Pirner and B.-J. Schaefer
hep-ph/9410262
Astrophysical Limits on Gravitino Mass
We calculate exotic cooling rates of stars due to photo-production of light particles (mostly scalars and pseudoscalars) which originate from the hidden sector of no scale supergravity theories. Using this we can restrict the gravitino mass $m_{3/2}$. The range of eliminated values of $m_{3/2}$ stretches over six order...
1994-10-11
2009-10-28
[ "hep-ph" ]
M. Nowakowski and S.D. Rindani
hep-ph/9410257
The Pomeron in QCD
In the framework of Anisotropic Chromodynamics, a non-perturbative realization of QCD, we develop the Low-Nussinov picture of the Pomeron. In this approach all the usual problems of low pT perturbative calculations (infrared divergence) are naturally absent. Thus, we are able to perform an ab initio calculation of the ...
1994-10-11
2009-10-28
[ "hep-ph" ]
Giuliano Preparata and Philip G. Ratcliffe
hep-ph/9410261
Some Properties of a Transient New Coherent Condition of Matter Formed in High--Energy Hadronic Collisions
We investigate the dynamical possibility for the formation of a transient new coherent condition of matter in high--energy hadronic collisions. The coherent bosonic amplitude is characterized by a non--zero momentum and is sustained by $P $--wave interactions of quasi--pions in a dense fermionic medium. We make quantit...
1994-10-11
2009-10-28
[ "hep-ph" ]
S. Barshay and P. Heiliger