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hep-ph/9305266
Successive Combination Jet Algorithm For Hadron Collisions
Jet finding algorithms, as they are used in $e^+ e^-$ and hadron collisions, are reviewed and compared. It is suggested that a successive combination style algorithm, similar to that used in $e^+ e^-$ physics, might be useful also in hadron collisions, where cone style algorithms have been used previously.
1993-05-14
2010-02-18
[ "hep-ph" ]
Stephen D. Ellis and Davision E. Soper
hep-ph/9305267
The Semileptonic Decays $D\to \pi(\rho) e \nu$ and $B\to \pi (\rho) e \nu$ from QCD Sum Rules
We investigate the semileptonic decays of B and D mesons into $\pi$ and $\rho$ mesons, respectively, by means of QCD sum rules. We find that for the vector formfactors involved the pole dominance hypothesis is valid to good accuracy with pole masses in the expected range. Pole dominance, however, does not apply to the ...
1993-05-14
2010-11-01
[ "hep-ph" ]
Patricia Ball
hep-ph/9305270
Leading Electroweak Corrections to the Production of Heavy Top Quarks at Hadron Colliders
We calculate the electroweak corrections of the order $O({m_t^2\over v^2})$ to the QCD production of $t\bar{t}$ pairs via $q+qbar->t+tbar$ at hadron colliders and show that these corrections to the total production rate are small. This correction can be characterized as increasing the cross section most near the thresh...
1993-05-14
2009-09-25
[ "hep-ph" ]
C. Kao, G.A. Ladinsky and C.-P. Yuan
hep-ph/9305269
Instanton-induced contributions to structure functions of deep inelastic scattering
We identify and calculate the instanton-induced contributions to deep inelastic scattering which correspond to nonperturbative exponential corrections to the coefficient functions in front of parton distributions of the leading twist.
1993-05-14
2009-10-22
[ "hep-ph" ]
I.I. Balitsky and V.M. Braun
hep-ph/9305271
Can Electro-Weak $\h$-Term be Observable ?
We rederive and discuss the result of the previous paper that in the standard model $\theta$-term related to $W$-boson field can not be induced by weak instantons. This follows from the existence of the fermion zero mode in the instanton field even when Yukawa couplings are switched on and there are no massless particl...
1993-05-14
2010-11-01
[ "hep-ph" ]
A.A.Anselm and A.A.Johansen
hep-ph/9305265
Neutrino Cosmology and Limits on Extended Technicolor
Using Big Bang Nucleosynthesis limits on the number of light neutrinos we derive a cosmological lower bound of $\approx 2$ TeV on the scale of extended technicolor interactions (or any other new interactions) for the third family in models where heavy gauge bosons couple to both left and right-handed neutrinos.
1993-05-13
2009-10-22
[ "hep-ph", "astro-ph" ]
Lawrence M. Krauss, John Terning, and Thomas Appelquist
hep-ph/9305262
Phenomenological Implications of Supersymmetry Breaking by the Dilaton
We investigate the low energy properties of string vacua with spontaneously broken $N=1$ supersymmetry by a dilaton $F$-term. As a consequence of the universal couplings of the dilaton, the supersymmetric mass spectrum is determined in terms of only three independent parameters and more constrained than in the minimal ...
1993-05-13
2011-07-19
[ "hep-ph", "hep-th" ]
R. Barbieri, J. Louis, M. Moretti
hep-ph/9305264
Axion detection in the milli-eV mass range
We propose an experimental scheme to search for galactic halo axions with mass $m_a \sim 10^{-3}$eV, which is above the range accessible with cavity techniques. The detector consists of a large number of parallel superconducting wires embedded in a material transparent to microwave radiation. The wires carry a current ...
1993-05-13
2009-12-30
[ "hep-ph", "astro-ph" ]
Pierre Sikivie, D.B. Tanner, and Yun Wang
hep-ph/9305261
Degree Scale Microwave Anisotropies in NonGaussian Theories of Cosmic Structure Formation
The COBE satellite's maps of the cosmic microwave background (CMB) anisotropy do not have the resolution to discriminate between theories of cosmic structure formation based on inflation, and those based on field ordering following a symmetry breaking phase transition. For this purpose it is critical to resolve the CMB...
1993-05-13
2009-09-25
[ "hep-ph", "astro-ph" ]
David Coulson, Ue-Li Pen and Neil Turok
hep-ph/9305263
Semiclassical Scattering in Yang-Mills Theory
A classical solution to the Yang-Mills theory is given a new semiclassical interpretation. The boundary value problem on a complex time contour which arises from the semiclassical approximation to multiparticle scattering amplitudes is reviewed and applied to the case of Yang- Mills theory. The solution describes a cla...
1993-05-13
2010-11-01
[ "hep-ph", "hep-th" ]
Thomas M. Gould and Erich R. Poppitz
hep-ph/9305256
Hadronization in Nuclear Matter
Nuclei are unique analyzers of the space-time development of jets at early stage. We argue that the gluon bremsstrahlung, rather than the color string, is the main mechanism of hadronization of highly virtual quarks produced in a hard interaction. It results in an energy- and time-independent density of energy loss, li...
1993-05-12
2007-05-23
[ "hep-ph" ]
Boris Kopeliovich
hep-ph/9305258
Revenge of the One-Family Technicolor Models
We describe how isospin splitting and techniquark-technilepton splitting in one-family technicolor models can reduce the predicted value of the electroweak radiative correction parameter S, without making a large contribution to the T parameter.
1993-05-12
2009-10-22
[ "hep-ph" ]
Thomas Appelquist and John Terning
hep-ph/9305260
Heavy Quark Fragmentation to Polarised Quarkonium
We calculate the polarisation of $\psi$'s and $\Upsilon$'s produced by the fragmentation of heavy quarks. We find that fragmentation to transversely aligned quarkonium is slightly enhanced relative to longitudinally polarised. This net alignment corresponds to a $\sim 5\%$ asymmetry in the angular distribution of lepto...
1993-05-12
2009-10-22
[ "hep-ph" ]
Adam F. Falk, Michael Luke, Martin J. Savage and Mark B. Wise
hep-ph/9305253
The Stability of the Weak Skyrmions
We consider a set of gauge invariant terms in higher order effective Lagrangians of the strongly interacting scalar of the electroweak theory. The terms are introduced in the framework of the hidden gauge symmetry formalism. The usual gauge term is known to stabilize the skyrmion but only in the large vector mass limit...
1993-05-12
2009-10-22
[ "hep-ph" ]
L. Marleau and H. Omari
hep-ph/9305250
Measuring Chirally Odd Wave Functions with Helicity Flip Form Factors
We consider the role of chirally odd wave functions in hard exclusive reactions. Such wave functions have the quarks oriented in the opposite helicity configuration from those assumed in the short-distance limit and are generally associated with non-zero orbital angular momentum. Calculations in the impulse approximati...
1993-05-12
2007-05-23
[ "hep-ph" ]
Pankaj Jain and John P. Ralston
hep-ph/9305255
Five Phases of Weak Neutral Current Experiments from the Perspective of a Theorist
I give my personal perspective on the past, present, and future of weak neutral current experiments, emphasizing the experimental inputs; the theoretical difficulties and inputs; the role of model independent and global analyses; and the implications at each stage. hep-ph/yymmnnn
1993-05-12
2015-06-25
[ "hep-ph" ]
Paul Langacker
hep-ph/9305257
Towards a Model Independent Treatment of Future Solar Neutrino Data
Possibilities of a model independent treatment of the data from future real-time solar neutrino experiments (SNO, Super-Kamiokande and others) are discussed. It is shown that in the general case of transitions of the initial solar $\nu_e$'s into $\nu_\mu$ and/or $\nu_\tau$ the total flux of initial $^8\mathrm{B}$ neutr...
1993-05-12
2009-10-22
[ "hep-ph" ]
S.M. Bilenky and C. Giunti
hep-ph/9305251
On Exclusive Reactions in the Time-Like Region
The electromagnetic form factors of the proton in the time-like region and two-photon annihilations into proton-antiproton are investigated. To calculate these processes at moderately large $s$ we use a variant of the Brodsky-Lepage hard-scattering formalism where diquarks are considered as quasi-elementary constituent...
1993-05-12
2009-10-22
[ "hep-ph" ]
P. Kroll, Th. Pilsner, M. Schuermann and W. Schweiger
hep-ph/9305254
LEP and radiative electroweak breaking close the light gluino window
We show that the LEP lower bound on the chargino mass, in conjunction with the well motivated theoretical requirement of radiative electroweak symmetry breaking, imply an upper bound on the lightest Higgs boson mass ($m_h\lsim62\GeV$) in a supersymmetry breaking scenario where the gluino mass is a few GeV. Moreover, Hi...
1993-05-12
2008-11-26
[ "hep-ph" ]
J. Lopez, D. Nanopoulos, and X. Wang
hep-ph/9305259
Effect of CP-Odd Planck Scale Induced Operators on the Majoron Scale
Definitions of the control sequences included, but no other changes.
1993-05-12
2009-10-22
[ "hep-ph" ]
R.N. Mohapatra and X. Zhang
hep-ph/9305248
When Are Radiative Corrections Important in the Minimal Supersymmetric Model?
Precision electroweak measurements at LEP currently check the validity of the Standard Model to about one part in a thousand. Any successful model of physics beyond the Standard Model must be consistent with these observations. The impact of radiative corrections on the Minimal Supersymmetric Model (MSSM) is considered...
1993-05-12
2007-05-23
[ "hep-ph" ]
Howard E. Haber
hep-ph/9305243
Model Independent Upper Bound on the Lightest Higgs Boson Mass in Supersymmetric Standard Models
One of the main features of the Minimal Supersymmetric Standard Model (MSSM) is the existence of an absolute tree-level upper bound $m_h$ on the mass of the $CP=+1$ lightest Higgs boson, equal to $m_Z$, that could affect detectability at future colliders. The above bound is spoiled by {\bf radiative corrections} and by...
1993-05-11
2009-09-25
[ "hep-ph" ]
Mariano Quiros
hep-ph/9305241
High Temperature Response Functions and the Non-Abelian Kubo Formula
We describe the relationship between time-ordered and retarded response functions in a plasma. We obtain an expression, including the proper $i\epsilon$-prescription, for the induced current due to hard thermal loops in a non-Abelian theory, thus giving the non-Abelian generalization of the Kubo formula. The result is ...
1993-05-11
2009-10-22
[ "hep-ph", "hep-th" ]
R. Jackiw and V. P. Nair
hep-ph/9305249
The Process of Generation of Mass, The Higgs Boson, and Dark Matter
A dynamical mechanism of symmetry breaking in which gauge and matter fields play an active role is proposed. It basically represents a covariant generalization of the mechanism responsible for superconductivity, and provides a {\em natural} mechanism of generation of mass which is not in conflict with the present value...
1993-05-11
2007-05-23
[ "hep-ph", "astro-ph", "cond-mat", "hep-th" ]
V. Delgado
hep-ph/9305245
Color Transparency and Fermi Motion
It is argued that color transparency in quasi elastic scattering of electrons and hadrons on nuclei is possible only due to Fermi-motion. We found a strong dependence of nuclear transparency on Bjorken x in (e,e'p), it is close to the Glauber model expectations at $x>1$, but increases and even exceeds one at $x<1$. It ...
1993-05-11
2009-10-22
[ "hep-ph" ]
Byron K. Jennings and Boris Z. Kopeliovich
hep-ph/9305239
One-loop helicity amplitudes for all 2 -> 2 processes in QCD and N=1 supersymmetric Yang-Mills theory
One loop corrections to the helicity amplitudes of all 2 -> 2 subprocesses are calculated in QCD and in N=1 supersymmetric Yang-Mills theory using two versions of dimensional regularization: the `t~Hooft-Veltman scheme and dimensional reduction. Studying the structure of the soft and collinear singularities, we found u...
1993-05-11
2009-10-22
[ "hep-ph" ]
Zoltan Kunszt, Adrian Signer and Zolt\'an Tr\'ocs\'anyi
hep-ph/9305240
On parton distributions beyond the leading order
The importance of properly taking into account the factorization scheme dependence of parton distribution functions is emphasized. A serious error in the usual handling of this topic is pointed out and the correct procedure for transforming parton distribution functions from one factorisation scheme to another recalled...
1993-05-11
2016-08-14
[ "hep-ph" ]
J. Ch\'yla
hep-ph/9305236
General Issues in the Evolution of Fermion Masses and Mixings
General issues in the renormalization group evolution of fermion masses and mixings is discussed. An effective fixed point in the top quark Yukawa coupling can strongly constrain its value at the electroweak scale. Predictions following from Yukawa coupling unification are affected by threshold corrections at the grand...
1993-05-11
2007-05-23
[ "hep-ph" ]
V. Barger, M. S. Berger, P. Ohmann
hep-ph/9305242
Quantum Statistical Metastability Revisited
We calculate the decay rate for a state prepared in a thermal density matrix centered on a metastable ground state. We find a rate that is intrinsically time {\it dependent}, as opposed to the {\it constant} rates of previous works. The rate vanishes at early times, rises to a maximum and eventually falls-off to zero a...
1993-05-11
2007-05-23
[ "hep-ph", "hep-th" ]
D. Boyanovsky, R. Holman, D.-S. Lee, J.P. Silva and A. Singh
hep-ph/9305247
Hadron production in gamma-gamma collisions as a background for e+e- linear colliders
Drees and Godbole have proposed that, at the interaction point of an e+e- linear collider, one expects a high rate of hadron production by gamma-gamma collisions, providing an additional background to studies in e+e- annihilation. Using a simplified model of the gamma-gamma cross section with soft and jet-like componen...
1993-05-11
2009-10-22
[ "hep-ph" ]
Pisin Chen, Timothy L. Barklow, and Michael E. Peskin (SLAC)
hep-ph/9305238
Colour Screening, Quark Propagation in Nuclear Matter and the Broadening of the Momentum Distribution of Drell-Yan Pairs
We calculate the broadening of the transverse momentum distribution of a quark propagating through nuclear matter. Colour screening plays a fundamental role in that it cuts off quark-nucleon interactions with soft gluons. The mean transverse momentum of the quark acquired along its trajectory, observed via Drell-Yan pa...
1993-05-11
2009-10-22
[ "hep-ph" ]
J. Dolejsi, J. Huefner and B.Z. Kopeliovich
hep-ph/9305244
Production, Collection and Utilization of Very Long-Lived Heavy Charged Leptons
If a fourth generation of leptons exists, both the neutrino and its charged partner must be heavier than 45 GeV. We suppose that the neutrino is the heavier of the two, and that a global or discrete symmetry prohibits intergenerational mixing. In that case, non-renormalizable Planck scale interactions will induce a ver...
1993-05-11
2014-11-17
[ "hep-ph" ]
J.L.Goity, W.J.Kossler and Marc Sher
hep-ph/9305252
Vacuum fine tuning and empirical estimations of masses of the top-quark and Higgs boson
The fine-tuning principles are analyzed in search for predictions of top-quark and Higgs-boson masses. The modification of Veltman condition based on the compensation between fermion and boson vacuum energies within the Standard Model multiplets is proposed. It is supplied with the stability under rescaling and with th...
1993-05-11
2016-09-01
[ "hep-ph" ]
A.A.Andrianov and N.V.Romanenko
hep-ph/9305246
Discrete Time Quantum Mechanics
This paper summarizes a research program that has been underway for a decade. The objective is to find a fast and accurate scheme for solving quantum problems which does not involve a Monte Carlo algorithm. We use an alternative strategy based on the method of finite elements. We are able to formulate fully consistent ...
1993-05-11
2007-05-23
[ "hep-ph" ]
Carl M. Bender, Lawrence R. Mead, and Kimball A. Milton
hep-ph/9305235
Recent Results in Chiral Perturbation Theory for Mesons Containing a Single Heavy Quark
Chiral symmetry and heavy quark symmetry constrain the interactions of mesons containing a single heavy quark with low-momentum pions. Chiral corrections to the Isgur-Wise function for $\bar B_s \rightarrow D_s^{(*)}$ versus $\bar B \rightarrow D^{(*)}$ semileptonic decay, the ratio of heavy meson decay constants $f_{D...
1993-05-10
2009-09-25
[ "hep-ph" ]
Elizabeth Jenkins
hep-ph/9305232
Walking Technicolor And The $Zb\bar b$ Vertex
A slowly running technicolor coupling will affect the size of non-oblique corrections to the $Zb\bar b$ vertex from extended technicolor dynamics. We show that while ``walking technicolor'' reduces the magnitude of the corrections, they generally remain large enough to be seen at LEP.
1993-05-10
2008-11-26
[ "hep-ph" ]
R.S. Chivukula, E. Gates, E.H. Simmons and J. Terning
hep-ph/9305233
The off-Shell Electromagnetic Vertex of the Nucleon in Chiral Perturbation Theory
We study the electromagnetic vertex of a nucleon in next-to-leading order chiral perturbation theory (CPT). We consider the case where one of the nucleons at the $\gamma$NN vertex is off its mass shell. We define relevant measures for the off-shell dependence in the limited kinematical range allowed, and analyze their ...
1993-05-10
2009-10-22
[ "hep-ph" ]
J.W. Bos and J.H. Koch
hep-ph/9305234
Complex Time Solutions with Nontrivial Topology and Multi Particle Scattering in Yang-Mills Theory
A classical solution to the Yang-Mills theory is given a new semiclassical interpretation in terms of particle scattering. It solves the complex time boundary value problem, which arises in the semiclassical approximation to a multi particle transition probability in the one-instanton sector at fixed energy. The imagin...
1993-05-10
2010-11-01
[ "hep-ph", "hep-th" ]
Thomas M. Gould and Erich R. Poppitz
hep-ph/9305231
Exotic Bound State Production at Hadron Colliders
Hadronic production of nonrelativistic boundstates of $b^{\prime}$ or isosinglet quarks D with suppressed weak decays is investigated for LHC and SSC energies. QCD corrections to production and decay rates are incorporated. Large rates for final states from $\eta_{b^{\prime}}\rightarrow HZ$ are predicted.
1993-05-10
2009-10-22
[ "hep-ph" ]
J.H. K"uhn and E. Mirkes
hep-ph/9305221
Salient Features of High-Energy Multiparticle Distributions Learned from Exact Solutions of 1-d Ising Model
We have derived explicit expressions in the 1-d Ising model for multiplicity distributions $P_{\del\xi}(n)$ and factorial moments $F_q(\del\xi)$. We identify the salient features of $P_{\del\xi}(n)$ that lead to scaling, $F_q(\del\xi)=\F_q[F_2]$, and universality. These results compare well with the presently available...
1993-05-07
2014-11-17
[ "hep-ph", "cond-mat" ]
Ling-Lie Chau and Ding-Wei Huang
hep-ph/9305228
Coherent Nuclear Diffractive Production of Minijets - Illuminating Color Transparency
The cross section for coherent nuclear processes in which an incident meson or photon dissociates diffractively into two jets of high relative transverse momentum (between about 1 and 3 GeV/c) is found to be proportional in QCD to $A^2$ in a wide kinematical region. The leading correction to this is a significant posit...
1993-05-07
2009-10-22
[ "hep-ph", "nucl-th" ]
L. Frankfurt, G.A. Miller (Nuclear Theory Group, Department of Physics, FM-15 Seattle, Washington) and M. Strikman (Department of Physics, Penn. State University, University Park, PA)
hep-ph/9305226
Branching Processes and Multi-Particle Production
The general theory of the branching processes is used for establishing the relation between the parameters $k$ and $\bar n$ of the negative binomial distribution. This relation gives the possibility to describe the overall data on multiplicity distributions in $pp (p\bar p)$-collisions for energies up to 900 GeV and to...
1993-05-07
2009-10-22
[ "hep-ph" ]
S.G. Matinyan and E.B. Prokhorenko
hep-ph/9305229
Corrections from Low Momentum Physics to Heavy Quark Symmetry Relations for $B\rightarrow De\bar \nu_e$ and $B\rightarrow D^*e \bar \nu_e$ Decay
Heavy quark symmetry relations for $B\rightarrow De\bar \nu_e$ and $B\rightarrow D^*e \bar \nu_e$ form factors receive corrections suppressed by powers of the charm quark mass. For small up and down quark massed the leading corrections of order $(1/m_c)^{n+2}~n = 0,1,2,...$ have a nonanalytic dependence on the light qu...
1993-05-07
2009-10-22
[ "hep-ph" ]
Chi-Keung Chow and Mark B. Wise
hep-ph/9305227
Thermal quark production in pure glue and quark gluon plasmas
We calculate production rates for massless $(u,d)$ and massive $(s,c,b)$ quarks in pure glue and quark gluon plasmas to leading order in the strong coupling constant $g$. The leading contribution comes from gluon decay into $q\bar q$ pairs, using a thermal gluon propagator with finite thermal mass and damping rate. The...
1993-05-07
2009-10-22
[ "hep-ph", "nucl-th" ]
Tanguy Altherr and David Seibert
hep-ph/9305224
The Role of Zero-Modes in the Canonical Quantization of Heavy-Fermion QED in Light-Cone Coordinates
Four-dimensional heavy-fermion QED is studied in light-cone coordinates with (anti-)periodic field boundary conditions. We carry out a consistent light-cone canonical quantization of this model using the Dirac algorithm for a system with first- and second-class constraints. To examine the role of the zero modes, we con...
1993-05-07
2009-10-22
[ "hep-ph" ]
Robert W. Brown, Jin Woo Jun, Shmaryu M. Shvartsman, and Cyrus C. Taylor
hep-ph/9305230
New Supersymmetric Option for Two Higgs Doublets
If the standard electroweak gauge model is embedded in a larger theory which is supersymmetric and the latter breaks down to the former at some mass scale, then the reduced Higgs potential at the electroweak mass scale may differ from that of the well-known minimal supersymmetric extension. Specifically, if the larger ...
1993-05-07
2009-10-22
[ "hep-ph" ]
Ernest Ma and Daniel Ng
hep-ph/9305223
Using $b \to s\gamma$ to Probe Top Quark Couplings
Possible anomalous couplings of the top-quark to on-shell photons and gluons are constrained by the recent results of the CLEO Collaboration on both inclusive and exclusive radiative $B$ decays. We find that the process \bsg\ can lead to reasonable bounds on both the anomalous electric and magnetic dipole moments of th...
1993-05-07
2009-10-22
[ "hep-ph" ]
J.L. Hewett and T.G. Rizzo
hep-ph/9305222
Self-consistently Improved Finite Temperature Effective Potential for Gauge Theories
The finite temperature effective potential of the Abelian Higgs Model is studied using the self-consistent composite operator method, which sums up the contributions of daisy and superdaisy diagrams. The effect of the momentum dependence of the effective masses is estimated by using a Rayleigh-Ritz variational approxim...
1993-05-07
2011-07-19
[ "hep-ph", "hep-th" ]
G. Amelino-Camelia
hep-ph/9305225
Novel Color Transparency Effect: Scanning the Wave Function of Vector Mesons
We demonstrate how the virtual photoproduction of vector mesons on nuclei scans the wave function of vector mesons from the large non-perturbative transverse size $\rho \sim R_{V}$ down to the small perturbative size $\rho \sim 1/\sqrt{Q^{2}}$. Thee mechanism of scanning is based on color transparency and QCD predicted...
1993-05-07
2009-10-22
[ "hep-ph" ]
B.Z.Kopeliovich, J.Nemchick, N.N.Nikolaev and B.G.Zakharov
hep-ph/9305216
Unification of Couplings and the Dynamical Breakdown of the Electroweak Symmetry
I discuss the properties of the minimal supersymmetric extension of the standard model, in the case in which there is a dynamical breakdown of the electroweak symmetry induced by the formation of condensates of the third generation of quarks and their supersymmetric partners. The top quark and Higgs mass predictions de...
1993-05-06
2007-05-23
[ "hep-ph" ]
C.E.M. Wagner
hep-ph/9305218
Radiative Corrections to Supersymmetric Higgs Boson Masses
We discuss the large radiative corrections to the masses of supersymmetric Higgs bosons in the MSSM and in its simplest extension, the NMSSM, with particular attention paid to the bounds on the lightest CP-even Higgs mass found in both models. In the case of the MSSM, these corrections are found to be primarily associa...
1993-05-06
2007-05-23
[ "hep-ph" ]
P.L.White
hep-ph/9305219
Non-Perturbative Production of Multi-Boson States and Quantum Bubbles
The amplitude of production of $n$ on-mass-shell scalar bosons by a highly virtual field $\phi$ is considered in a $\lambda \phi^4$ theory with weak coupling $\lambda$ and spontaneously broken symmetry. The amplitude of this process is known to have an $n!$ growth when the produced bosons are exactly at rest. Here it i...
1993-05-06
2009-10-22
[ "hep-ph", "hep-th" ]
A.S. Gorsky and M.B. Voloshin
hep-ph/9305220
Single Lepton Production at Large Transverse Momentum
We study the production of single isolated leptons at large transverse momentum, $p_T^\ell > M_W/2$. The dominant source of such leptons is production of an on-shell $W$ boson recoiling against a hard jet. Vetoing this jet forces the $W$ boson to be produced off resonance and significantly reduces the standard model cr...
1993-05-06
2009-09-25
[ "hep-ph" ]
W. T. Giele, E. W. N. Glover, and David A. Kosower
hep-ph/9305214
The Rosner-Worah Type Quark Mass Matrix and Ansatz of Maximal CP Violation
A democratic form version of the Rosner-Worah quark mass matrix is discussed from a phenomenological point of view. It is pointed out that an ansatz of "maximal CP violation" can provide reasonable values of the Kobayashi-Maskawa mixings.
1993-05-06
2010-11-01
[ "hep-ph" ]
Y. Koide and F. Fusaoka
hep-ph/9305217
NLO calculation of $\epsilon^{\prime}/\epsilon$ in QCD and QED within the lattice QCD framework
We present the results of our recent calculation of $\epsilon^{\prime}/ \epsilon$ at the Next-to-Leading (NLO) order in QCD and QED, in the framework of $\DSone$ Effective Hamiltonians. The operator matrix elements are taken from lattice QCD, at a scale $\mu=2\,\,\mbox{GeV}$. NLO corrections seem to lower the value of ...
1993-05-06
2007-05-23
[ "hep-ph" ]
L. Reina
hep-ph/9305215
Diquark electromagnetic form factors in a Nambu-Jona-Lasinio model
Electromagnetic properties of diquarks are investigated in the framework of a color-octet Nambu-Jona-Lasinio model, which describes baryons as bound states of diquarks and quarks. We calculate the electromagnetic form factors of scalar and axial vector diquark bound states using the gauge--invariant proper--time regula...
1993-05-06
2009-09-25
[ "hep-ph" ]
C. Weiss, A. Buck, R. Alkofer and H. Reinhardt
hep-ph/9305213
Bounding the Higgs Boson Mass in the Next-to-Minimal Supersymmetric Standard Model
We discuss the upper bound on the lightest CP-even Higgs boson mass in the next-to-minimal supersymmetric standard model within the framework of a low energy renormalisation group analysis. We find $m_h$ < 146 GeV for $m_t$ = 90 GeV, decreasing to $m_h$ < 123 GeV for $m_t$ = 180 GeV.
1993-05-05
2007-05-23
[ "hep-ph" ]
T. Elliott
hep-ph/9305212
The Standard Model of Leptons as a Purely Vectorial Theory
We propose a way to reconcile the Standard Model of leptons with a purely vectorial theory. The observed neutrino is predicted to be massless. The unobservability of its partner and the $V-A$ structure of the weak currents are given the same origin.
1993-05-05
2009-10-22
[ "hep-ph" ]
M. Bellon and B.Machet
hep-ph/9305207
Disoriented chiral condensate in (1+1) Lorentz-invariant geometry
We consider isospin correlations of pions produced in a relativistic nuclear collision, using an effective theory of the chiral order parameter. Our theory has (1+1) Lorentz invariance as appropriate for the central rapidity region. We argue that in certain regions of space correlations of the chiral order parameter ar...
1993-05-04
2015-06-25
[ "hep-ph" ]
S. Yu. Khlebnikov
hep-ph/9305210
Comment on SU(16) grand unification
In a recent paper on SU(16) grand unification, because of the presence of intermediate-energy gauge groups containing products of U(1) factors which are not orthogonal among themselves, the renormalization-group treatment has a few small errors. I correct it. I emphasize that one should not switch gauge couplings at th...
1993-05-04
2009-10-22
[ "hep-ph" ]
L. Lavoura (Carnegie-Mellon University)
hep-ph/9305208
Dark Matters in Axino Gravitino Cosmology
It is suggested that the axino mass in the 1 MeV region and gravitino mass in the eV region can provide an axino lifetime of order of the time of photon decoupling. In this case, some undecayed axinos act like cold dark matters and some axino decay products (gravitinos and hot axions) act like hot dark matters at the t...
1993-05-04
2010-12-09
[ "hep-ph" ]
Eung Jin Chun, Hang Bae Kim and Jihn E. Kim
hep-ph/9305211
Chiral symmetry and many-body nonleptonic decays of heavy hadrons
We suggest that, similar to the many applications of chiral effective Lagrangian made recently to semileptonic decays of heavy hadrons involving Goldstone bosons, chiral symmetry can also be applied to many-body nonleptonic decays of heavy hadrons. As examples we establish the chiral effective Hamiltonian for some typi...
1993-05-04
2007-05-23
[ "hep-ph" ]
Q.P. Xu and A.N. Kamal
hep-ph/9305209
Non-Trivial Phase Structure of $\phi ^{4}$-Theory at Finite Temperature
The effective potential for the local composite operator $\phi^{2}(x)$ in $\lambda \phi^{4}$-theory is investigated at finite temperature in an approach based on path-integral linearisation of the $\phi^4 $-interaction. At zero temperature, the perturbative vacuum is unstable, because a non-trivial phase with a scalar ...
1993-05-04
2009-10-22
[ "hep-ph", "cond-mat" ]
K. Langfeld, L.v. Smekal, H. Reinhardt
hep-ph/9305206
Perturbative QCD Fragmentation Functions for $B_c$ and $B_c^*$ Production
The dominant production mechanism for ${\bar b} c$ bound states in high energy processes is the production of a high energy ${\bar b}$ or $c$ quark, followed by its fragmentation into the ${\bar b} c$ state. We calculate the fragmentation functions for the production of the S-wave states $B_c$ and $B_c^*$ to leading or...
1993-05-03
2016-09-01
[ "hep-ph" ]
Eric Braaten, Kingman Cheung, Tzu Chiang Yuan
hep-ph/9305201
Weak Coupling Phase Structureof the Abelian Higgs Model at Finite Temperature
Using the 1-loop reduced 3D action of the Abelian Higgs-model we discuss the order of its finite temperature phase transition. A two-variable saddle point approximation is proposed for the evaluation of the effective potential. The strength of the first order case scales like \sim e^{3-6}. Analytic asymptotic weak coup...
1993-05-03
2009-10-22
[ "hep-ph" ]
A. Jakov\'ac and A. Patk\'os
hep-ph/9305204
Is Large Lepton Mixing Excluded?
The original \bnum -(or $\bar{\nu}_{\tau}$-) energy spectrum from the gravitational collapse of a star has a larger average energy than the spectrum for \bnue since the opacity of \bnue exeeds that of \bnum (or $\nu_{\tau}$). Flavor neutrino conversion, \bnue $\leftrightarrow$ \bnum, induced by lepton mixing results in...
1993-05-03
2009-10-22
[ "hep-ph" ]
Alexei Yu. Smirnov, David N. Spergel, and John N. Bahcall
hep-ph/9305205
The Earth Effect in the MSW Analysis of the Solar Neutrino Experiments
We consider the Earth effect in the MSW analysis of the Homestake, Kamiokande, GALLEX, and SAGE solar neutrino experiments. Using the time-averaged data and assuming two-flavor oscillations, the large-angle region of the combined fit extends to much smaller angles (to $\sin^22\theta \simeq 0.1$) than when the Earth eff...
1993-05-03
2009-04-13
[ "hep-ph", "astro-ph" ]
Naoya Hata and Paul Langacker
hep-ph/9305203
Decuplet Contributions to Hyperon Axial Vector Form Factors
We consider the predictions of chiral perturbation theory for $SU(3)$ breaking in the axial vector form factor $g_1$ measured in semileptonic hyperon decays. We confirm that if only octet baryon intermediate states are included, the non-analytic corrections are $\sim 100\%$. These corrections are dominated by an $SU(3)...
1993-05-03
2014-11-17
[ "hep-ph" ]
Markus A. Luty and Martin White
hep-ph/9305202
The sigma term and the quark number operator in QCD
We discuss the relationship of the forward matrix element of the operator $\bar\psi\psi$, related to the so-called sigma term, to the quark number. We show that in the naive quark model in the canonical formalism these quantities coincide in the limit of small average quark momenta. In the QCD parton model defined thro...
1993-05-03
2009-10-22
[ "hep-ph" ]
Mauro Anselmino and Stefano Forte
hep-ph/9304321
On the Erasure and Regeneration of the Primordial Baryon Asymmetry by Sphalerons
We show that a cosmological baryon asymmetry generated at the GUT scale, which would be destroyed at lower temperatures by sphalerons and possible new B- or L-violating effects, can naturally be preserved by an asymmetry in the number of right-handed electrons. This results in a significant softening of previously deri...
1993-04-30
2009-09-15
[ "hep-ph" ]
J.M. Cline, K. Kainulainen and K.A. Olive
hep-ph/9304320
Renormalization Group Improved Exponentiation of Soft Gluons in QCD
We extend the methods of Yennie, Frautschi and Suura to QCD for the summation of soft gluon effects in which infrared singularities are cancelled to all orders in $\alpha_s$. An explicit formula for the respective \rngp improved exponentiated cross section is obtained for $q+\bbar{{q'}}\to q+\bbar{{q'}}+ n(G)$ at SSC e...
1993-04-30
2009-10-22
[ "hep-ph" ]
D.B. DeLaney, S.Jadach, Ch. Shio, G. Siopsis, B.F.L. Ward
hep-ph/9304319
Isgur-Wise Functions from the Mit Bag Model
The Isgur-Wise functions for the ground state to ground state semileptonic decays involving $b \rightarrow c$ transitions are calculated from the (modified) MIT bag model. It is checked that the results for the decays $\overline{B} \rightarrow D l \overline\nu$ and $\overline{B} \rightarrow D^* l \overline\nu$ agree we...
1993-04-30
2009-10-22
[ "hep-ph" ]
M. Sadzikowski and K. Zalewski
hep-ph/9304318
Beyond the Standard Model
The standard model of particle physics is marvelously successful. However, it is obviously not a complete or final theory. I shall argue here that the structure of the standard model gives some quite concrete, compelling hints regarding what lies beyond.
1993-04-30
2009-10-22
[ "hep-ph" ]
Frank Wilczek
hep-ph/9304322
Quantum Memory Effects in the Measurement of Observables with a Continuous Spectrum
In the measurement of a continuous observable Q, the pure components of the reduced state do, in general, depend on the initial state. For measurements which attempt to localize the measured system in a certain region R, the localized wave functions are proportional to the original wave function outside of R. This `qua...
1993-04-30
2007-05-23
[ "hep-ph" ]
Kai J. Druhl
hep-ph/9304315
pi-pi scattering in a QCD based model field theory
A model field theory, in which the interaction between quarks is mediated by dressed vector boson exchange, is used to analyse the pionic sector of QCD. It is shown that this model, which incorporates dynamical chiral symmetry breaking, asymptotic freedom and quark confinement, allows one to calculate $f_\pi$, $m_\pi$,...
1993-04-29
2010-03-04
[ "hep-ph" ]
Craig D. Roberts, Reginald T. Cahill, Martin E. Sevior and Nicolangelo Iannella
hep-ph/9304316
Fermion and Anti-Fermion Effective Masses in High Temperature Gauge Theories in $CP$-Asymmetric Background
We calculate the splitting between fermion and anti-fermion effective masses in high temperature gauge theories in the presence of a non-vanishing chemical potential due to the $CP$-asymmetric fermionic background. In particular we consider the case of left-handed leptons in the $SU(2)\otimes U(1)$ theory when the temp...
1993-04-29
2010-11-01
[ "hep-ph" ]
A. Erdas, C. W. Kim and J. A. Lee
hep-ph/9304314
Strange and Non-Strange Meson Fluctuations off the Nambu--Jona-Lasinio Soliton
Mesonic fluctuations off the chiral soliton of the Nambu--Jona-Lasinio model are investigated. The hedgehog configuration is proven to represent a local extremum of the action. The method is applied to flavor SU(3) and the energy eigenvalue of the kaon bound state in the soliton background is evaluated which is the key...
1993-04-29
2009-09-25
[ "hep-ph" ]
H. Weigel, H. Reinhardt and R. Alkofer
hep-ph/9304317
How to Measure the Mass of the W
We perform a numerical calculation of the total cross section $\sigma(e^+e^- \rightarrow W^+W^-)$ as a function of energy, taking into account the finite width of the $W$ and the most important radiative corrections. We present these results, in tabular form, for several values of $M_W$. Using these results, we investi...
1993-04-29
2007-05-23
[ "hep-ph" ]
Matthew H. Austern and Robert N. Cahn
hep-ph/9304311
Next to leading order eta production at hadron colliders
Inclusive eta production at hadron colliders is considered,based on evaluation of eta fragmentation functions at next to leading order. Absolute predictions at LHC and SSC are presented, including the ratio $\eta/\pi^0$, together with the estimate of the theoretical uncertainty, as a possible neutral background to the ...
1993-04-28
2008-11-26
[ "hep-ph" ]
M.Greco and S.Rolli
hep-ph/9304313
New Eaxactly Solvable Hamiltonians: Shape Invariance and Self-Similarity
We discuss in some detail the self-similar potentials of Shabat and Spiridonov which are reflectionless and have an infinite number of bound states. We demonstrate that these self-similar potentials are in fact shape invariant potentials within the formalism of supersymmetric quantum mechanics. In particular, using a s...
1993-04-28
2009-10-22
[ "hep-ph" ]
D.T. Barclay, R. Dutt, A. Gangopadhyaya, Avinash Khare, A. Pagnamenta and U. Sukhatme
hep-ph/9304310
Hamiltonian Quantization of Effective Lagrangians with Massive Vector Fields
Effective Lagrangians containing arbitrary interactions of massive vector fields are quantized within the Hamiltonian path integral formalism. It is proven that correct Hamiltonian quantization of these models yields the same result as naive Lagrangian quantization (Matthews's theorem). This theorem holds for models wi...
1993-04-28
2009-10-22
[ "hep-ph", "hep-th" ]
Carsten Grosse-Knetter (Universitaet Bielefeld)
hep-ph/9304312
A Note on Charge Quantization Through Anomaly Cancellation
In a minimal extension of the Standard Model, in which new neutral fermions have been introduced, we show that the requirement of vanishing anomalies fixes the hypercharges of all fermions uniquely. This naturally leads to electric charge quantization in this minimal scenario which has features similar to the Standard ...
1993-04-28
2011-07-19
[ "hep-ph" ]
M. Nowakowski and A. Pilaftsis
hep-ph/9304309
Linear and higher order power corrections in semileptonic B decays
In previous work we have developed a relativistic quark model of mesons which is consistent with all QCD constraints at zeroth and first order in the heavy quark expansion. Here we obtain first order model predictions for the differential decay spectrum, the forward-backward asymmetry $A_{FB}$ and the $D^{\ast}$ polari...
1993-04-27
2009-10-22
[ "hep-ph" ]
B. Holdom and M. Sutherland
hep-ph/9304302
Effective Lagrangian for Heavy and Light Mesons: Radiative B Decays
We make use of the information obtained from semileptonic decays of $B$ and $D$ mesons, within an effective lagrangian description based on heavy quark theory and on chiral expansion, to study the radiative decays $B \to K^\star \gamma$ and $B_S \to \phi\gamma$, and the pair conversion processes $B \to K e^+e^-$ and $B...
1993-04-27
2009-10-22
[ "hep-ph" ]
R.Casalbuoni, A.Deandrea, N.Di Bartolomeo, R.Gatto and G. Nardulli
hep-ph/9304305
Extra symmetries in the effective theory of heavy quarks
Extra symmetries are shown to exist in the effective theory of heavy quarks when both quarks and anti-quarks with the same velocity are included. These symmetries mix the quark with the anti-quark sector and they resemble axial-type of symmetries. Together with the known flavor and spin symmetries they form a $u(4)$ al...
1993-04-27
2014-11-17
[ "hep-ph", "hep-th" ]
J. Soto and R. Tzani
hep-ph/9304303
Two-loop two-point functions with masses: asymptotic expansions and Taylor series, in any dimension
In all mass cases needed for quark and gluon self-energies, the two-loop master diagram is expanded at large and small $q^2$, in $d$ dimensions, using identities derived from integration by parts. Expansions are given, in terms of hypergeometric series, for all gluon diagrams and for all but one of the quark diagrams; ...
1993-04-27
2011-08-17
[ "hep-ph" ]
D.J.Broadhurst, J.Fleischer and O.V.Tarasov
hep-ph/9304308
Higgs particle detection using jets
We study the possibility of detecting the Higgs boson in the intermediate mass range via its two jet channel. We consider only Higgs bosons produced in association with a $t \bar{t}$ pair. Both $t$ and $\bar{t}$ are required to decay semileptonically to reduce the QCD background. The signal is compared with the main ba...
1993-04-27
2009-12-30
[ "hep-ph" ]
T. Garavaglia, W. K. Kwong and Dan-di Wu
hep-ph/9304306
Gamma Rays from Small Scale Structures on Long Cosmic Strings
The formation of cusps on long cosmic strings is discussed and the probability of cusp formation is estimated. The energy distribution of the gamma-ray background due to cusp annihilation on long strings is calculated and compared to observations. Under optimistic assumptions about the cusp formation rate, we find that...
1993-04-27
2009-10-22
[ "hep-ph", "astro-ph" ]
M. Mohazzab, R. H. Brandenberger (Brown)
hep-ph/9304299
Flavor Symmetries and The Problem of Squark Degeneracy
If supersymmetry exists at low energies, it is necessary to understand why the squark spectrum exhibits sufficient degeneracy to suppress flavor changing neutral currents. In this note, we point out that gauged horizontal symmetries can yield realistic quark mass matrices, while at the same time giving just barely enou...
1993-04-27
2010-11-01
[ "hep-ph" ]
M. Dine, A. Kagan and R. G. Leigh
hep-ph/9304304
Momentum Distributions in $t\bar t$
We apply the Green function formalism for $t-\bar t$ production and decay near threshold in a study of the effects due to the momentum dependent width for such a system. We point out that these effects are likely to be much smaller than expected from the reduction of the available phase space. The Lippmann--Schwinger e...
1993-04-27
2015-06-25
[ "hep-ph" ]
M. Je\zabek and T. Teubner
hep-ph/9304300
The Motion of Massive Test Particles in the Dark Matter with an $a_0/r^2$ Energy Density
The motion of massive test particles in dark matter is studied. It is shown that if the energy density of the dark matter making up a galactic halo has a large $r$ behavior of $1/r^2$, then contrary to intuition the motion of these test particles are not govern by Newtonian gravity, but rather by the equations of geode...
1993-04-27
2008-02-03
[ "hep-ph", "astro-ph", "gr-qc" ]
Achilles D. Speliotopoulos
hep-ph/9304301
Decorated-box-diagram-contributions to Bhabha scattering. (II)
We evaluate, in the high-energy limit, $s\gg|t|\gg m^2\gg\lambda^2$, the sum of amplitudes corresponding to a class of Feynman diagrams describing two-loop virtual photonic corrections to Bhabha scattering. The diagrams considered are box and crossed box diagrams with a vacuum polarization insertion in one of the photo...
1993-04-27
2009-10-22
[ "hep-ph" ]
G\"oran F\"aldt and Per Osland
hep-ph/9304307
Should Squarks Be Degenerate?
For generic squark masses, box diagrams with squarks and gluinos give unacceptably large contributions to neutral meson ($K$, $B$ and $D$) mixing. The standard solution to this problem is to assume that squarks are degenerate to a very good approximation. We suggest an alternative mechanism to suppress squark contribut...
1993-04-27
2009-09-15
[ "hep-ph" ]
Yosef Nir and Nathan Seiberg
hep-ph/9304298
Precision Electroweak Tests of the Minimal and Flipped SU(5) Supergravity Models
We explore the one-loop electroweak radiative corrections in the minimal $SU(5)$ and the no-scale flipped $SU(5)$ supergravity models via explicit calculation of vacuum polarization contributions to the $\epsilon_{1,2,3}$ parameters. Experimentally, $\epsilon_{1,2,3}$ are obtained from a global fit to the LEP observabl...
1993-04-26
2009-10-22
[ "hep-ph" ]
J. Lopez, D.V. Nanopoulos, G. Park, H. Pois, and K. Yuan
hep-ph/9304297
High Energy Quark-Antiquark Elastic scattering with Mesonic Exchange
We studies the high energy elastic scattering of quark anti-quark with an exchange of a mesonic state in the $t$ channel with $-t/\Lambda^{2} \gg 1$. Both the normalization factor and the Regge trajectory can be calculated in PQCD in cases of fixed (non-running) and running coupling constant. The dependence of the Regg...
1993-04-24
2009-10-22
[ "hep-ph" ]
Wai-Keung Tang
hep-ph/9304293
Phenomenology of a Non-Standard Higgs
The one-Higgs-doublet standard model is necessarily incomplete because of the triviality of the scalar symmetry-breaking sector. If the Higgs mass is approximately 600 GeV or higher, there must be additional dynamics at a scale $\Lambda$ which is less than a few TeV. In this case the properties of the Higgs resonance c...
1993-04-23
2015-06-25
[ "hep-ph", "hep-lat" ]
R. Sekhar Chivukula and Vassilis Koulovassilopoulos
hep-ph/9304294
SSC Phenomenology of the 331 Model of Flavor
The 331 model offers an explanation of flavor by anomaly cancellation between three families. It predicts three exotic quarks, $Q=D$, $S$, $T$, and five extra gauge bosons comprising an additional neutral $Z_2$ and four charged dileptonic gauge bosons $(Y^{--},Y^-)$, $(Y^{++},Y^+)$. Production of $Q\overline{Q}$, $QY$,...
1993-04-23
2011-07-19
[ "hep-ph" ]
Paul H. Frampton, James T. Liu, Daniel Ng, and B. Charles Rasco
hep-ph/9304291
$SU(3)$ vs. $SU(3) \times SU(3)$ Breaking in Weak Hyperon Decays
We consider the predictions of chiral perturbation theory for $SU(3)$ breaking in weak semileptonic and $s$-wave nonleptonic hyperon decays. By defining an expansion sensitive only to $SU(3)$ breaking, we show that the leading corrections give rise to moderate corrections to $SU(3)$ relations ($\lsim 20\%$), even thoug...
1993-04-23
2008-02-03
[ "hep-ph" ]
Markus A. Luty and Martin White
hep-ph/9304295
Phenomenological Implications of the $m_t$ RGE Fixed Point for SUSY Higgs Boson Searches
In minimal SUSY-GUT models with $M_{SUSY}\ltap 1$ TeV, the renormalization group equations have a solution dominated by the infrared fixed point of the top Yukawa coupling. This fixed point predicts $m_t=(200\; {\rm GeV})\sin \beta $; combined with the LEP results it excludes $m_t\ltap 130$ GeV. For $m_t$ in the range ...
1993-04-23
2009-09-15
[ "hep-ph" ]
V. Barger, M. S. Berger, P. Ohmann and R. J. N. Phillips
hep-ph/9304296
Parton-Parton Elastic Scattering and Rapidity Gaps at Very High Energies
The theory of the perturbative pomeron, due to Lipatov and collaborators, is used to compute the probability of observing parton-parton elastic scattering and rapidity gaps between jets in hadron collisions at very high energies.
1993-04-23
2009-10-22
[ "hep-ph" ]
Vittorio Del Duca and Wai-Keung Tang