id
large_stringlengths
9
16
title
large_stringlengths
1
382
abstract
large_stringlengths
3
6.09k
publish_date
date32
update_date
date32
categories
large listlengths
1
13
authors
large_stringlengths
3
62.8k
hep-ph/9403387
Quarkonium production and decays
Quarkonium decays are studied in the charmonium model. Relativistic corrections, higher-order perturbative QCD corrections and non- perturbative contributions are discussed. Recent measurements of charmonium annihilation rates are used to evaluate the strong coupling constant $\alpha_s$ simultaneously with the wave fun...
1994-03-29
2007-05-23
[ "hep-ph" ]
G.A. Schuler
hep-ph/9403375
Massless Scalar QED with Non-minimal Chern Simons Coupling
2+1 dimensional massless scalar QED with $(\phi^*\phi)^3$ scalar self-coupling is modified by the addition of a non- minimal Chern-Simons term that couples the dual of the electromagnetic field strength to the covariant current of the complex scalar field. The theory is shown to be fully one- loop renormalizable. The o...
1994-03-28
2009-10-28
[ "hep-ph" ]
M.E. Carrington and G. Kunstatter
hep-ph/9403378
Renormalizable W Self-Energy in the Unitary Gauge via the Pinch Technique
We use the S-matrix pinch technique to derive to one loop order an effective renormalizable self-energy for the W gauge boson, when the theory is quantized in the unitary gauge. We then show that this amplitude is identical to the $\xi$-independent W self-energy previously constructed by applying the pinch technique in...
1994-03-28
2009-10-28
[ "hep-ph" ]
Joannis Papavassiliou and Alberto Sirlin
hep-ph/9403381
The Instanton Density at Finite Temperatures
For {\it low} T new strict results for the instanton density n(T) are reported. Using the PCAC methods, we express n(T) in terms of {\it vacuum} average values of certain operators, times their {\it calculated} T-dependence. At high T, we discuss the {\it applicability} limits of the perturbative results. We further sp...
1994-03-28
2009-10-28
[ "hep-ph" ]
E.Shuryak and M.Velkovsky (Physics Department, State University of New York, Stony Brook, NY)
hep-ph/9403380
Pi- Eta Mixing from QCD Sum Rules
The $q^2$ dependence of the $\pi$-$\eta$ mixing amplitude is examined with the use of QCD sum rules. The linear slope of the mixing function $\theta(q^2)$ is found to be much smaller than that for $\rho$-$\omega$ mixing. Thus the mixing amplitude is approximately the same in the space-like region as in the time-like on...
1994-03-28
2009-10-28
[ "hep-ph", "nucl-th" ]
Chuan-Tsung Chan, E.M.Henley and Th.Meissner
hep-ph/9403379
Two-Photon Production of Charged Pion and Kaon Pairs
A measurement of the cross section for the combined two-photon production of charged pion and kaon pairs is performed using 1.2~$\rm fb^{-1}$ of data collected by the CLEO~II detector at the Cornell Electron Storage Ring. The cross section is measured at invariant masses of the two-photon system between 1.5 and 5.0 GeV...
1994-03-28
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403376
The Inclusive $\bar B\to \tau \bar\nu X$ Decay in Two Higgs Doublet Models
We calculate in the framework of two Higgs doublet models the differential decay rate for inclusive $\bar B\to\tau\,\bar\nu\,X$ transitions to order $1/m_b^2$ in the heavy quark expansion, for both polarized and unpolarized tau leptons. In contrast to the situation in the standard model, we find sizeable $1/m_b^2$ corr...
1994-03-28
2009-09-25
[ "hep-ph" ]
Yuval Grossman and Zoltan Ligeti
hep-ph/9403374
Coherent state formulation of pion radiation from nucleon antinucleon annihilation
We assume that nucleon antinucleon annihilation is a fast process leading to a classical coherent pion pulse. We develop the quantum description of such pion waves based on the method of coherent states. We study the consequences of such a description for averages of charge types and moments of distributions of pion mo...
1994-03-28
2019-08-17
[ "hep-ph" ]
R.D.Amado, F.Cannata, J.-P.Dedonder, M.P.Locher and Bin Shao
hep-ph/9403373
$Z^0$--${Z^0}^\prime$ and ordinary-exotic fermion mixings revisited using some special observables
We investigate the mixing of an extra ${Z^0}^\prime$ with the standard $Z^0$ and mixings of exotic fermions with their standard counterparts through some precisely measured electroweak observables. These observables are geared to search for physics beyond the Standard Model. We observe that although most of such mixing...
1994-03-28
2011-01-13
[ "hep-ph" ]
Gautam Bhattacharyya
hep-ph/9403372
Heavy Meson Decays into Light Resonances
We analyse the Lorentz structures of weak decay matrix elements bewteen meson states of arbitrary spin. Simplifications arise in the transition amplitudes for a heavy meson decaying into a light one via a Bethe-Salpeter approach which incorporates heavy quark symmetry. Phenomenological consequences on several semilepto...
1994-03-28
2008-11-26
[ "hep-ph" ]
R. Delbourgo and Dongsheng Liu (University of Tasmania)
hep-ph/9403377
The $A_{LL}$ asymmetry in diffractive reactions and structure of quark-pomeron vertex
Theoretical predictions for the behavior of $A_{LL}$ asymmetry determined by the pomeron-hadron vertex are done. Strong dependence of the asymmetry on the mass creating quarks and transfer momenta is shown.
1994-03-28
2009-09-25
[ "hep-ph" ]
S.V.Goloskokov, O.V.Selyugin
hep-ph/9403370
$B \rar K^* \ \gamma$} from Hybrid Sum Rule
Using the {\it hybrid} moments-Laplace sum rule (HSR), which is well-defined for $M_b \rar \infty$, in contrast with the $popular$ double Borel (Laplace) sum rule (DLSR), which blows up in this limit when applied to the heavy-to-light processes, we show that the form factor of the $B \rar K^* \ \gamma$ radiative transi...
1994-03-27
2009-10-28
[ "hep-ph" ]
S. Narison
hep-ph/9403371
Calculation of Chirality Violating Proton Structure Function h$_1$(x) in QCD
The twist-two chirality violating proton structure function $h_1(x)$ measurable in the polarized Drell-Yan process is calculated by means of QCD sum rules at intermediate $x$, $0.3 < x < 0.7$ and $Q^2 \approx 5-10 GeV^2$.
1994-03-27
2009-10-28
[ "hep-ph" ]
B.L.Ioffe, A. Khodjamirian
hep-ph/9403369
Deficiency of the Gross - Llewellyn Smith Sum Rule and QCD Vacuum Polarization Effect
From the analysis of the recent CCFR data for the \st\ $xF_3(x,Q^2)$ ($0.015<x<0.65$ and $1.2\ GeV^2 < |Q^2| < 501\ GeV^2$) of the deep inelastic neutrino - nucleon scattering we conclude that probably part of the nucleon baryon number is due to the vacuum polarization effects.
1994-03-27
2008-02-03
[ "hep-ph" ]
A. E. Dorokhov
hep-ph/9403367
Phase structure of $SU(2)$ Yang-Mills theory with global center symmetry
Retaining only the `timelike' component $A_0$ of the vector potential a skelet model with explicit global center symmetry is constructed for $SU(2)$ Yang-Mills theory. It is shown that the $A_0$ gluon vacuum is equivalent with the 4-dimensional Coulomb-gas. In 1--loop approximation, the effective theory of the skelet m...
1994-03-25
2007-05-23
[ "hep-ph" ]
K. Sailer
hep-ph/9403361
Angular Distributions in the Drell-Yan Process: A Closer Look at Higher Twist Effects
We calculate the angular distribution of the lepton produced in the Drell-Yan reaction taking into account pion bound state effects. We work in the kinematic region where one of the pion constituents goes far off-shell, which allows us to treat the bound state problem perturbatively. We show that the angular distributi...
1994-03-25
2009-09-25
[ "hep-ph" ]
A. Brandenburg, S. J. Brodsky, V. V. Khoze and D. M\"uller
hep-ph/9403366
V-a Tests Through Leptons from Polarised Top Quarks
Angular-energy distributions are studied for charged leptons and neutrinos from the decays of polarised top quarks. A small admixture of V+A interactions is incorporated. The polarisation dependent part of the neutrino distribution which can be measured experimentally through the missing momentum is particularly sensit...
1994-03-25
2009-10-28
[ "hep-ph" ]
M. Je\.zabek and J.H. K\"uhn
hep-ph/9403365
Semi Hard Parton Rescatterings in Nuclear Collisions at Very High Energies
Representing the semi-hard partonic interactions by the exchange of Lipatov's perturbative Pomeron, we express the semi-hard nuclear cross section as a self shadowing cross section. With the help of a generating functional technique, we obtain average numbers of multiple semi-hard partonic collisions without any need o...
1994-03-25
2009-10-28
[ "hep-ph" ]
R. Ragazzon and D. Treleani
hep-ph/9403362
LHC Detection of Neutral MSSM Higgs Bosons via $gg\rta b\anti b \h\rta b\anti b b\anti b$
We demonstrate that simultaneous detection of two of the neutral Higgs bosons of the Minimal Supersymmetric Model will be possible at the LHC in the $b\anti b b\anti b$ final state, provided $\tanb$ is large and $b$-tagging can be performed with good efficiency and purity. This mode enhances the already established gua...
1994-03-25
2009-10-28
[ "hep-ph" ]
J. Dai, J.F. Gunion, and R. Vega
hep-ph/9403364
Gravitino Production in the Inflationary Universe and the Effects on Big-Bang Nucleosynthesis
Gravitino production and decay in the inflationary universe are reexamined. Assuming that the gravitino mainly decays into a photon and a photino, we calculate the upperbound on the reheating temperature. Compared to previous works, we have essentially improved the following two points: (i) the helicity $\pm\frac{3}{2}...
1994-03-25
2017-02-01
[ "hep-ph" ]
M. Kawasaki and T. Moroi
hep-ph/9403363
Direct Photoproduction of Jets in the KT Factorisation Prescription
We study the cross section for dijet production via direct photons, as seen at the HERA collider. Rather than assuming the standard factorisation formula for the cross section (where the incoming partons are assumed to be on-shell), we use the $k_T$-factorisation formula. This formalism ought to be more appropriate for...
1994-03-25
2009-09-25
[ "hep-ph" ]
J.R Forshaw and R.G. Roberts
hep-ph/9403360
Gravitational uncertainties from dimension-six operators on supersymmetric GUT predictions
We consider the gravity induced dimension six terms in addition to the dimension five terms in the SUSY GUT Lagrangian and find that the prediction for $\alpha_s$ may be washed out completely in supersymmetric grand unified theories unless the triplet higgs mass is smaller than $ 7\times 10^{16} $ GeV.
1994-03-25
2019-08-17
[ "hep-ph" ]
Alakabha Datta, Sandip Pakvasa and Utpal Sarkar
hep-ph/9403359
Production and Decay of D_1(2420)^0 and D_2^*(2460)^0
We have investigated $D^{+}\pi^{-}$ and $D^{*+}\pi^{-}$ final states and observed the two established $L=1$ charmed mesons, the $D_1(2420)^0$ with mass $2421^{+1+2}_{-2-2}$ MeV/c$^{2}$ and width $20^{+6+3}_{-5-3}$ MeV/c$^{2}$ and the $D_2^*(2460)^0$ with mass $2465 \pm 3 \pm 3$ MeV/c$^{2}$ and width $28^{+8+6}_{-7-6}$ ...
1994-03-25
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403368
$\gamma \gamma $ Processes at High Energy pp Colliders
In this note we investigate the production of charged heavy particles via \gaga\ fusion at high energy pp colliders. We revise previous claims that the \gaga\ cross section is comparable to or larger than that for the corresponding Drell-Yan process at high energies. Indeed we find that the \gaga\ contribution to the t...
1994-03-25
2011-07-19
[ "hep-ph" ]
M.Drees, R.M. Godbole, M. Nowakowski and S.D. Rindani
hep-ph/9403358
Search for Anomalous Couplings at $e\gamma$ Colliders
We consider the possibility of observing deviations from the Standard Model gauge-boson self-couplings at future $e\gamma$ colliders. We concentrate on the process $e^-\gamma \rightarrow \nu W^- Z$, which is particularly sensitive to the parity violating coupling $g_5^Z$ at high energies. We find that a 2~TeV $e^+ e^-$...
1994-03-24
2009-12-30
[ "hep-ph" ]
K. Cheung (Northwestern), S. Dawson (BNL), T. Han (U. C., Davis), G. Valencia (Iowa)
hep-ph/9403352
Possible reason why leptons are lighter than quarks
The minimal model of spontaneously broken leptonic colour and discrete quark-lepton symmetry predicts that charged leptons have the same masses as their partner charge $+2/3$ quarks up to small radiative corrections. By invoking a different pattern of symmetry breaking, a similar model can be constructed with the struc...
1994-03-24
2009-10-28
[ "hep-ph" ]
R. R. Volkas
hep-ph/9403354
Seesaw-Type Quark and Lepton Mass Matrices and U(3)-Family Nonet Higgs Bosons
A unified mass matrix model of quarks and leptons with a seesaw-type form $M_f=m M_F^{-1} m$ is proposed on the basis of a non-standard Higgs scenario. The matrix $m$ is provided by U(3)-family nonet bosons $\phi$, and the matrix $M_F$ is a mass matrix of heavy fermions $F_i$ corresponding to the ordinary fermions $f_i...
1994-03-24
2008-02-03
[ "hep-ph" ]
Yoshio Koide and Hideo Fusaoka
hep-ph/9403357
Indirect Detection of WIMPs
I review several proposed techniques for indirect detection of weakly interacting massive particles (WIMPs) in the halo. I focus on distinctive signatures from cosmic-ray positrons, antiprotons, and gamma rays produced by annihilation of WIMPs in the galactic halo. (To appear in Particle Astrophysics, Atomic Physics, a...
1994-03-24
2007-05-23
[ "hep-ph", "astro-ph" ]
Marc Kamionkowski
hep-ph/9403349
Leptonic CP Violation in Supersymmetric Standard Model
We point out the possibility of spontaneous and hard CP-violation in the scalar potential of R-parity broken supersymmetric Standard Model. The existence of spontaneous CP-violation depends crucially on the R-parity breaking terms in the superpotential and, in addition, on the choice of the soft supersymmetry breaking ...
1994-03-24
2010-11-01
[ "hep-ph" ]
A.S. Joshipura and M. Nowakowski
hep-ph/9403356
An alternative model for the electroweak symmetry breaking sector and its signature in future e-gamma colliders
We perform a preliminary study of the deviations from the Standard Model prediction for the cross section for the process $e \gamma \rightarrow \nu_e W \gamma$. We work in the context of a higgsless chiral lagrangian model that includes an extra vector resonance $V$ and an anomalous $\gamma W V$ coupling. We find that ...
1994-03-24
2013-11-13
[ "hep-ph" ]
Rogerio Rosenfeld
hep-ph/9403353
Quantum Scattering from Classical Field Theory
We show that scattering amplitudes between initial wave packet states and certain coherent final states can be computed in a systematic weak coupling expansion about classical solutions satisfying initial value conditions. The initial value conditions are such as to make the solution of the classical field equations am...
1994-03-24
2009-10-28
[ "hep-ph", "hep-th" ]
Thomas M. Gould, Stephen D.H. Hsu, and Erich R. Poppitz
hep-ph/9403355
Covariant model of a quarkonium with the funnel potential
The bound--state problem for the pion as a quarkonium with the funnel (Coulomb--plus--linear) interaction is solved in a framework that combines the bilocal approach to mesons with the covariant generalization of the instantaneous--potential model. The potential interaction leads to dynamical breaking of chiral symmetr...
1994-03-24
2009-09-25
[ "hep-ph" ]
R. Horvat, D. Kekez, D. Palle and D. Klabu\v{c}ar
hep-ph/9403351
QCD Accurately Predicts the Induced Pseudoscalar Coupling Constant
Using chiral Ward identities of QCD, we derive a relation for the induced pseudoscalar coupling constant which is accurate within a few percent, $g_P = 8.44 \pm 0.16$.
1994-03-24
2009-10-28
[ "hep-ph" ]
V. Bernard, N. Kaiser and Ulf-G. Mei{\ss}ner
hep-ph/9403347
The Two-Jet Differential Cross Section at ${\cal O}(\alpha_s^3)$ in Hadron Collisions
We study the two-jet inclusive cross section via the triply differential distribution $d^3\sigma/dE_{T}d\eta_1 d\eta_2$ to next-to-leading order in QCD. The predicted distributions can be compared directly with forthcoming data from the D0 and CDF experiments at Fermilab. We discuss differences with the leading-order p...
1994-03-23
2008-11-26
[ "hep-ph" ]
W.T. Giele, E.W.N. Glover and D.A. Kosower
hep-ph/9403345
A Model Independent Approach to Future Solar Neutrino Experiments
We discuss here what model independent information about properties of neutrinos and of the sun can be obtained from future solar neutrino experiments (SNO, Super-Kamiokande). It is shown that in the general case of transitions of solar $\nu_e$'s into $\nu_\mu$ and/or $\nu_\tau$ the initial $^8\mathrm{B}$ neutrino flux...
1994-03-23
2011-05-23
[ "hep-ph", "astro-ph" ]
S.M. Bilenky and C. Giunti
hep-ph/9403344
Chemical Equilibration in the Parton Cascade Model
This comment is hereby withdrawn, because the paper by D. Seibert, KSUCNR-005-94 and nucl-th/9403005 was withdrawn and it was acknowleged that the parton cascade model does approach chemical equilibrium correctly. Therefore our reply to Seibert's paper is now obsolete.
1994-03-23
2008-02-03
[ "hep-ph" ]
K. Geiger and J.I. Kapusta
hep-ph/9403346
Effect of longitudinal electron polarization in the measurement of the $\tau$ weak dipole moment in $e^+e^-$ collisions
We show that certain CP-odd momentum correlations in the production and subsequent decay of tau pairs in $e^+e^-$ collisions get enhanced when the electron beam is longitudinally polarized. Analytic expressions for these correlations are obtained when $\tau^+\tau^-$ have a ``weak" dipole form factor (WDFF) coupling to ...
1994-03-23
2010-11-01
[ "hep-ph" ]
B. Ananthanarayan and Saurabh D. Rindani
hep-ph/9403348
$\pi \pi$ Scattering and Pion Form Factors
The S and P wave $\pi \pi$ phase shifts are recalculated in terms of two phenomenological parameters using the one loop CPTh and the elastic unitarity condition. Using these phase shifts, the vector and scalar form factors are calculated and shown to be in a good agreement with experimental data. It is found that the s...
1994-03-23
2016-09-01
[ "hep-ph" ]
L.Beldjoudi and T.N Truong (CPT Ecole Polytechnique)
hep-ph/9403337
Phenomenology of the Two Higgs Doublet Sector of a Quark-Lepton Symmetric Model
In the simplest examples of models with a discrete quark-lepton symmetry, an electroweak symmetry breaking sector with more than one Higgs doublet is necessary to obtain the correct mass relations between quarks and leptons. A two Higgs doublet model has flavour-nonconserving Yukawa couplings, which are proportional to...
1994-03-23
2009-10-28
[ "hep-ph" ]
C. C. Lassig and R. R. Volkas
hep-ph/9403343
Effective Lagrangian for a Technicolor Model without Exact Custodial Symmetry
Effective Lagrangian including technimesons is constructed for a realistic one-family Technicolor model without exact custodial symmetry. Tree level contribution to oblique correction parameters $S$ and $U$ due to spin 1 technimesons are computed with the effective Lagrangian. An isospin breaking term which is associ...
1994-03-23
2017-02-01
[ "hep-ph" ]
T.Yoshikawa, H.Takata and T.Morozumi
hep-ph/9403339
Kaon Condensation in ``Nuclear Star" Matter
The critical density for kaon condensation in ``nuclear star" matter is computed up to two-loop order {\it in medium} (corresponding to next-to-next-to-leading order in chiral perturbation theory in free space) with a heavy-baryon effective chiral Lagrangian whose parameters are determined from $KN$ scattering and kaon...
1994-03-22
2009-10-28
[ "hep-ph", "nucl-th" ]
Chang-Hwan Lee, G.E. Brown and Mannque Rho
hep-ph/9403336
A Particular Class of GUTs with Vanishing One-Loop Beta Functions
By explicit solution of the one-loop finiteness conditions for gauge and quartic scalar-boson self-interaction coupling constants, a particular class of grand unified theories with vanishing Yukawa couplings as well as vanishing one-loop renormalization-group beta functions is constructed.
1994-03-22
2015-06-25
[ "hep-ph", "hep-th" ]
Wolfgang Lucha and Franz F. SCH\"Oberl
hep-ph/9403334
How to probe the spin-dependent gluon distributions
Two-spin asymmetries $A_{LL}^{\pi^0}$ are calculated for various types of spin-dependent gluon distributions. It is concluded that the E581/704 data on $A_{LL}^{\pi^0}$ do not necessarily rule out the large gluon polarization but restrict severely the $x$ dependence of its distribution. Moreover, $A_{LL}^{J/\psi}$ are ...
1994-03-22
2009-09-25
[ "hep-ph" ]
T.Morii, S.Tanaka and T.Yamanishi
hep-ph/9403340
Derivative Expansion of the Exact Renormalization Group
The functional flow equations for the Legendre effective action, with respect to changes in a smooth cutoff, are approximated by a derivative expansion; no other approximation is made. This results in a set of coupled non-linear differential equations. The corresponding differential equations for a fixed point action h...
1994-03-22
2009-10-28
[ "hep-ph", "cond-mat", "hep-lat", "hep-th" ]
Tim R. Morris
hep-ph/9403327
Precision Measurement of the $D_s^{*+}- D_s^+$ Mass Difference
We have measured the vector-pseudoscalar mass splitting $M(D_s^{*+})-M(D_s^+) = 144.22\pm 0.47\pm 0.37 MeV$, significantly more precise than the previous world average. We minimize the systematic errors by also measuring the vector-pseudoscalar mass difference $M(D^{*0})-M(D^0)$ using the radiative decay $D^{*0}\righta...
1994-03-22
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403324
Critical Exponents without the Epsilon Expansion
We argue that the sharp-cutoff Wilson renormalization group provides a powerful tool for the analysis of second-order and weakly first-order phase transitions. In particular, in a computation no harder than the calculation of the 1-loop effective potential, we show that the Wilson RG yields the fixed point couplings an...
1994-03-22
2009-10-28
[ "hep-ph" ]
Mark Alford
hep-ph/9403328
A Measurement of ${\cal B}(D_s \to \phi l^+ \nu)/{cal B}(D_s\to \phi \pi^+)$
Using the CLEO~II detector at CESR, we have measured the ratio of branching fractions ${\cal B}(D_s^+ \to \phi e^+ \nu)/{\cal B}(D_s^+ \to \phi\pi^+) = 0.54\pm 0.05\pm 0.04$. We use this measurement to obtain a model dependent estimate of ${\cal B}(D_s^+ \to \phi \pi^+)$.
1994-03-22
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403338
Fermion masses and mixing angles from gauge symmetries
The structure of the quark and lepton masses and mixing angles provides one of the few windows we have on the underlying physics generating the \sm. In an attempt to identify the underlying symmetry group we look for the simplest gauge extension of the SUSY standard model capable of generating the observed structure. W...
1994-03-22
2011-07-19
[ "hep-ph" ]
Luis E. Ibanez and G.G. Ross
hep-ph/9403329
Measurement of Cabibbo Suppressed Decays of the $\tau$ Lepton
Branching ratios for the dominant Cabibbo-suppressed decays of the $\tau$ lepton have been measured by CLEO~II in $e^+ e^-$ annihilation at CESR ($\sqrt{s} \sim 10.6$~GeV) using kaons with momenta below $0.7\ \rm GeV/c$. The inclusive branching ratio into one charged kaon is $(1.60 \pm 0.12 \pm 0.19)\%$. For the exclus...
1994-03-22
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403342
${\cal O}(\alpha^2 L^2)$ radiative corrections to deep inelastic $ep$ scattering for different kinematical variables
The QED radiative corrections are calculated in the leading log approximation up to ${\cal O}(\alpha^2)$ for different definitions of the kinematical variables using jet measurement, the 'mixed' variables, the double angle method, and a measurement based on $\theta_e$ and $y_{JB}$. Higher order contributions due to exp...
1994-03-22
2009-10-28
[ "hep-ph" ]
Johannes Bl\"umlein
hep-ph/9403330
Gauge Coupling Unification due to Non-universal Soft Supersymmetry Breaking
Gauge coupling unification is studied in the MSSM with non-universal soft supersymmetry breaking terms. If gaugino masses are sufficiently smaller than scalar soft masses and the scalar soft masses have also certain types of non-universality, gauge coupling unification scale can be larger than $3\times 10^{16}$~GeV eve...
1994-03-22
2009-10-28
[ "hep-ph" ]
T.Kobayashi, D.Suematsu and Y.Yamagishi
hep-ph/9403325
Observation of a New Charmed Strange Meson
Using the CLEO-II detector, we have obtained evidence for a new meson decaying to $D^0 K^+$. Its mass is $2573.2^{+1.7}_{-1.6}\pm 0.8\pm 0.5$ {}~MeV/$c^2$ and its width is $16^{+5}_{-4}\pm 3$~MeV/$c^2$. Although we do not establish its spin and parity, the new meson is consistent with predictions for an $L=1$, $S=1$, $...
1994-03-22
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403326
Study of the Decay $\Lambda_c \to \Lambda l^+ \nu_{l}
Using the CLEO II detector at CESR, we observe 500 $\Lambda l^+$ pairs consistent with the semileptonic decay $\Lambda_c \to \Lambda l^+ \nu_{l}$. We measure $\sigma (e^+ e^- \to \Lambda_c X) \dot {cal B}(\Lambda_c^+ \to \Lambda l \nu_{l}) =4.77 \pm 0.25 \pm 0.66 $pb. Combining with the charm semileptonic width and the...
1994-03-22
2012-08-27
[ "hep-ph", "hep-ex" ]
The CLEO Collaboration
hep-ph/9403331
Hadronic $ZZ$, $W^- W^+$, and $W^{\pm} Z$ Production with QCD Corrections and Leptonic Decays
The processes $p p \rightarrow V_1 V_2 + X \rightarrow \ell_1 \bar \ell_1 \ell_2 \bar \ell_2 + X$, where $V_i = W^{\pm}$ or $Z$ and $\ell_i$ denotes a lepton, are calculated to ${\cal O}(\alpha_s)$. Total and differential cross sections, with acceptance cuts imposed on the final state leptons, are given for the Tevatro...
1994-03-22
2011-05-05
[ "hep-ph" ]
J. Ohnemus
hep-ph/9403350
Constraints on Baryon-Nonconserving Yukawa Couplings in a Supersymmetric Theory
The 1-loop evolution of couplings in the minimal supersymmetric standard model, extended to include baryon nonconserving $(B\!\!\!/)$ operators through explicit $R$-parity violation, is considered keeping only $B\!\!\!/$ superpotential terms involving the maximum possible number of third generation superfields. If all ...
1994-03-22
2014-11-17
[ "hep-ph" ]
Biswajoy Brahmachari and Probir Roy
hep-ph/9403332
The Charged Neutrino: A New Approach to the Solar Neutrino Problem
We have considered the effect of the reduction of the solar neutrino flux on earth due to the deflection of the charged neutrino by the magnetic field of the solar convective zone. The antisymmetry of this magnetic field about the plane of the solar equator induces the anisotropy of the solar neutrino flux thus creatin...
1994-03-22
2009-04-13
[ "hep-ph" ]
A.Yu.Ignatiev and G.C.Joshi
hep-ph/9403341
Determining the Quark Mixing Matrix From CP-Violating Asymmetries
If the Standard Model explanation of CP violation is correct, then measurements of CP-violating asymmetries in $B$ meson decays can in principle determine the entire quark mixing matrix.
1994-03-22
2009-09-25
[ "hep-ph" ]
R. Aleksan, B. Kayser and D. London
hep-ph/9403333
A Way to Measure Polarized Gluon Distributions
Effects of the spin-dependent gluon distributions on J/$\psi$ productions in polarized ep and pp collisions are investigated. These productions serve as a very clean probe of the spin-dependent gluon distributions in a proton.
1994-03-22
2009-09-25
[ "hep-ph" ]
T.Morii, S.Tanaka and T.Yamanishi
hep-ph/9403335
On the Damping Rate of a Fast Fermion in Hot QED
The self-consistent determination of the damping rate of a fast moving fermion in a hot QED plasma is reexamined. We argue how a detailed investigation of the analytic properties of the retarded fermion Green's function motivated by the cutting rules at finite temperature may resolve ambiguities related to the proper d...
1994-03-22
2010-11-01
[ "hep-ph" ]
R. Baier (Bielefeld) and R. Kobes (LAPP)
hep-ph/9403323
Electroweak Strings Produce Baryons
We propose a new mechanism to generate baryons. Electroweak strings produced at the electroweak phase transition will introduce anomalous currents through interactions of the strings with the background electromagnetic field and through changes in the helicity of the string network. These anomalous currents will produc...
1994-03-21
2009-12-30
[ "hep-ph" ]
M. Barriola
hep-ph/9403320
Retarded/Advanced Correlation Functions and Soft Photon Production in the Hard Loop Approximation
We apply the retarded/advanced formalism of real time field theory to the QED or QED like case. We obtain a general expression for the imaginary part of the two-point correlation function in terms of discontinuities. The hard loop expansion is derived. The formalism is used to extract the divergent part of the soft fer...
1994-03-21
2007-05-23
[ "hep-ph" ]
P. Aurenche, T. Becherrawy, E. Petitgirard
hep-ph/9403321
Measuring Hadronization Length in e^+ e^- \rightarrow K^0 {\bar{K}}^0 \gamma
We propose to study the space-time picture of hadronization by looking at the angular distribution of photons emitted in the process e^+ e^- \rightarrow K^0 {\bar{K}}^0 \gamma at DA{\Phi}NE energies. it is shown that the angular distributions are quite sensitive to the hadronization length.
1994-03-21
2009-10-28
[ "hep-ph" ]
Dmitri Kharzeev, Andrei Leonidov
hep-ph/9403322
O(alpha_s) Longitudinal Spin Polarization in Heavy-Quark Production
The massive one-loop {\it QCD} corrections to the production cross sections of We present the massive one-loop {\it QCD} corrections to the production cross sections of polarized quarks in the annihilation process $e^+e^-\to q\bar{q}(g)$ for bottom, top, and charm quarks. From the full analytical expressions for the pr...
1994-03-21
2010-01-15
[ "hep-ph" ]
Michael M. Tung
hep-ph/9403318
Strong Extended Technicolour Interactions and the $Zb\bar{b}$ Vertex
LEP precision measurements of the $Zb\bar{b}$ vertex coupling are sufficiently accurate to see the non-oblique corrections from the heavy gauge boson responsible for the large top mass in standard extended tecnicolour models. If the ETC couplings are strong the techni-fermion condensate may be enhanced by several order...
1994-03-21
2009-10-28
[ "hep-ph" ]
Nick Evans
hep-ph/9403319
l=0 to l=1 Transition Form Factors
A method is proposed to extend the hard scattering picture of Brodsky and Lepage to transitions between hadrons with orbital angular momentum l=0 and l=1. The use of covariant spin wave functions turns out to be very helpful in formulating that method. As a first application we construct a light-cone wave function of t...
1994-03-21
2009-09-25
[ "hep-ph" ]
J. Bolz, P. Kroll, J.G. Koerner
hep-ph/9403314
Axial Properties of the Nucleon with $1/N_c$-Corrections in the solitonic SU(3)-NJL-Model
Within the semibosonized SU(3)-NJL model the mass splittings of baryons and the axial vector coupling constants of the nucleon are evaluated. The mass splittings of the hyperons are reproduced with great accuracy if second order corrections in $m_s$ are taken into account. New corrections to the axial vector currents c...
1994-03-20
2009-10-28
[ "hep-ph" ]
A. Blotz, M. Praszalowicz, K.Goeke
hep-ph/9403315
Phases in Leptonic Mass Matrices: Higher Order Invariants and Applications to Models
We discuss complex rephasing invariants of charged lepton and neutrino mass matrices and associated theorems which determine in general (i) the number of physically meaningful phases in these matrices and (ii) which elements of these matrices can be rendered real by rephasings. New results are presented on higher order...
1994-03-20
2007-05-23
[ "hep-ph" ]
A. Kusenko and R. Shrock
hep-ph/9403312
Proton stability in superstring derived models
I discuss the problem of proton decay, from dimension four, five and six operators, in superstring derived standard--like models. I classify the sectors that produce color triplet superfields which may generate proton decay from dimension five and six operators. I show that for two of these sectors there exist a unique...
1994-03-19
2009-10-28
[ "hep-ph", "hep-th" ]
Alon E. Faraggi
hep-ph/9403313
Hadronic Spectrum in Inclusive Semileptonic B Decays
We evaluate the inclusive semileptonic B decay spectrum as a function of the final-state hadrons energy to second order in the inverse quark mass expansion and tree level in $\alpha_{s}$. We argue that there is an energy interval below the $c$ production threshold that could be used to determine $V_{ub}$.
1994-03-19
2010-11-01
[ "hep-ph" ]
A. Bouzas and D. Zappala
hep-ph/9403311
Neutrinos with Zee-Mass Matrix in Vacuum and Matter
Neutrino mass matrix generated by the Zee (radiative) mechanism has zero (in general, small) diagonal elements and a natural hierarchy of the nondiagonal elements. It can be considered as an alternative (with strong predictive power) to the matrices generated by the see-saw mechanism. The propagation in medium of the n...
1994-03-18
2009-10-28
[ "hep-ph" ]
Alexei Yu. Smirnov and Zhijian Tao
hep-ph/9403317
MSSM from SUSY Trinification
We construct a $SU(3)^3$ supersymmetric gauge theory with a common gauge coupling g. Spontaneous breaking of this gauge group at a scale $M_X=1.3\times10^{16} $GeV gives naturally rise exactly to the Minimal Supersymmetric Standard Model $(MSSM)$ and consequently to the experimentally favored values of $sin^2\theta_w$ ...
1994-03-18
2008-11-26
[ "hep-ph" ]
G. Lazarides and C. Panagiotakopoulos
hep-ph/9403309
Chiral Morphing
Chiral symmetry undergoes a metamorphosis at $T_c$. For $T < T_c$, the usual Noether charge, $\Qa$, is dynamically broken by the vacuum. Above $T_c$, chiral symmetry undergoes a subtle change, and the Noether charge \underline{{\em morphs}} into $\Qbeta$, with the thermal vacuum now becoming invariant under $\Qbeta$....
1994-03-18
2008-02-03
[ "hep-ph" ]
Ngee Pong Chang
hep-ph/9403310
Dynamics of Weak First Order Phase Transitions
The dynamics of weak vs. strong first order phase transitions is investigated numerically for 2+1 dimensional scalar field models. It is argued that the change from a weak to a strong transition is itself a (second order) phase transition, with the order parameter being the equilibrium fractional population difference ...
1994-03-18
2009-10-28
[ "hep-ph", "cond-mat", "hep-lat" ]
Marcelo Gleiser
hep-ph/9403316
Large $tan \beta$ from $SU(2)_R$ Gauge Symmetry
Sufficient conditions for the relation $tan \beta \simeq m_t/m_b$ to hold in supersymmetric grand unified theories are formulated. Essential ingredients are the $SU(2)_R$ gauge symmetry and a discrete matter parity. The applicability of our conditions is illustrated by specific examples. Implications for neutrino masse...
1994-03-18
2008-11-26
[ "hep-ph" ]
G.Lazarides and C.Panagiotakopoulos
hep-ph/9403308
Measuring $|V_{ub}|$ at future B-Factories
We calculate the so--called Fermi motion parameter $p_{_F}$ of ACCMM model using the variational method in a potential model approach. We also propose hadronic invariant mass distribution as an alternative experimental observable to measure $V_{ub}$ at future asymmetric $B$ factories.
1994-03-18
2015-06-25
[ "hep-ph" ]
C.S. Kim, Daesung Hwang, Pyungwon Ko and Wuk Namgung
hep-ph/9403307
Supercollider Signatures of Supergravity Models with Yukawa Unification
We study the predictions of the simplest SU(5) grand unified model within the framework of minimal supergravity, including constraints from the radiative breaking of electroweak symmetry. As a consequence of the unification of the $b$-quark and $\tau$-lepton Yukawa couplings, the top quark mass is predicted to be close...
1994-03-18
2011-07-19
[ "hep-ph" ]
H. Baer, M. Drees, C. Kao, M. Nojiri and X. Tata
hep-ph/9403301
Resummations in Hot Scalar Electrodynamics
The gauge-boson sector of perturbative scalar electrodynamics is investigated in detail as a testing ground for resummation methods in hot gauge theories. It also serves as a simple non-trivial reference system for the non-Abelian gluon plasma. The complete next-to-leading order contributions to the polarization tensor...
1994-03-17
2010-11-01
[ "hep-ph", "hep-th" ]
U. Kraemmer, A.K.Rebhan, and H. Schulz
hep-ph/9403306
Implications of Yukawa unification for the Higgs sector in supersymmetric grand-unified models
The SU(5) unification-scale relation h_b=h_tau between the b and tau Yukawa couplings severely constrains tan beta and m_t (even more so if h_t=h_b= h_tau holds) in supersymmetric models. We examine the implications of these constraints for the Higgs sector assuming universal soft breaking terms, and emphasize that bot...
1994-03-17
2009-10-28
[ "hep-ph" ]
Paul Langacker and Nir Polonsky
hep-ph/9403304
Constraints on Fermion Magnetic and Electric Moments from LEP-I
The effective Lagrangian approach allows us to constrain fermion magnetic and electric moments using LEP-I data. We improve some of the previous limits on these moments.
1994-03-17
2009-10-28
[ "hep-ph" ]
R. Escribano and E. Mass\'o
hep-ph/9403305
Pseudo Goldstones at Future Colliders from the Extended Bess Model
We consider the production of the lightest pseudo-Goldstone bosons at future colliders through the vector resonances predicted by the extended BESS model, which consists of an effective lagrangian parametrization with dynamical symmetry breaking, describing scalar, vector and axial-vector bound states in a rather gener...
1994-03-17
2009-10-28
[ "hep-ph" ]
R. Casalbuoni, P. Chiappetta, A. Deandrea, S. De Curtis, D. Dominici and R. Gatto
hep-ph/9403302
Lepton Spectra and the B Polarization at LEP
I review the present state of knowledge on lepton energy spectra in the inclusive semileptonic decay of beauty hadrons, as a means to measure b polarization effects on the Z peak. Charged-lepton as well as neutrino spectra are considered.
1994-03-17
2015-06-25
[ "hep-ph" ]
Barbara Mele
hep-ph/9403303
Mass Generation in the Standard Model without Dynamical Higgs Field
We call attention to the fact that the gauge symmetry $SU(3)\times SU(2)_{_L}\times U(1)$ of the Standard Model can be easily and naturally extended by the local conformal symmetry connected with the possibility of choosing the local length scale. Restricting the admissible interactions to the lowest order conformal in...
1994-03-17
2007-05-23
[ "hep-ph" ]
Marek Pawlowski and Ryszard Raczka, SINS/SISSA
hep-ph/9403296
A Solution to the Polonyi Problem in the Minimum SUSY-GUT
We show that the Polonyi problem is solved in the minimum SUSY-GUT model in which a self-coupling strength for a heavy Higgs $\Sigma$, $\lambda\Sigma^{3}$, is very small $\lambda\sim 10^{-6}$. It is stressed that with this small $\lambda$ the mass of the physical $\Sigma$ becomes $m_{\Sigma} \sim 10^{12}\GEV$ and the u...
1994-03-16
2008-11-26
[ "hep-ph" ]
T. Moroi and T. Yanagida
hep-ph/9403297
QCD corrections to the t-->H+b decay within the minimal supersymmetric standard model
I present the contribution of gluinos and scalar quarks to the decay rate of the top quark into a charged Higgs boson and a bottom quark within the minimal supersymmetric standard model, including the mixing of the scalar partners of the left- and right-handed top quark. I show that for certain values of the supersymme...
1994-03-16
2016-09-01
[ "hep-ph" ]
Heinz K\"onig
hep-ph/9403299
Triviality" and the Perturbative Expansion in $\lambda\Phi^4$ Theory
The "triviality" of $(\lambda\Phi^4)_4$ quantum field theory means that the renormalized coupling $\lambda_R$ vanishes for infinite cutoff. That result inherently conflicts with the usual perturbative approach, which begins by postulating a non-zero, cutoff-independent $\lambda_R$. We show how a "trivial" solution $\la...
1994-03-16
2007-05-23
[ "hep-ph" ]
M. Consoli and P.M. Stevenson
hep-ph/9403300
Signals of Disoriented Chiral Condensate
If a disoriented chiral condensate is created over an extended space-time region following a rapid cooling in hadronic or nuclear collisions, the misalignment of the condensate with the electroweak symmetry breaking can generate observable effects in the processes which involve both strong and electromagnetic interacti...
1994-03-16
2009-10-28
[ "hep-ph", "nucl-th" ]
Zheng Huang, Mahiko Suzuki and Xin-Nian Wang
hep-ph/9403295
Exclusive Hadronic B Decays to Charm and Charmonium Final States
We have fully reconstructed decays of both B0 and B- Mesons into final states containing either D, D*, D**, Psi, Psi', or Chi_{c1} mesons. This allows us to obtain new results on many physics topics including branching ratios, tests of the factorization hypothesis, color suppression, resonant substructure, and the B- -...
1994-03-16
2012-08-27
[ "hep-ph", "hep-ex" ]
the CLEO collaboration
hep-ph/9403298
Stable, Spinning Embedded Vortices
The spinning vortex is a stationary generalization of the Nielsen-Olesen vortex involving a linear time dependence of the Goldstone boson. Here we show that this vortex can be embedded in models with $SU(2)_{global}\times U(1)_{local}$ symmetry. We also map the stability sector in parameter space and show that for suff...
1994-03-16
2009-10-28
[ "hep-ph", "astro-ph" ]
Leandros Perivolaropoulos (Harvard)
hep-ph/9403288
Signatures of Scalar Top with R-parity Breaking Coupling at HERA
In the framework of the minimal supersymmetric standard model with an R-parity breaking coupling of the scalar top quark (stop) we investigate production processes and decay properties of the stop at HERA energies. The model is characterized by a light stop possibly lighter than the other squarks. We show that the stop...
1994-03-15
2009-10-28
[ "hep-ph" ]
Tadashi Kon, Tetsuro Kobayashi and Shoichi Kitamura
hep-ph/9403290
Production of Kaluza-Klein States at Future Colliders
Perturbative breaking of supersymmetry in four-dimensional string theories predict in general the existence of new large dimensions at the TeV scale. Such large dimensions lie in a domain of energies accessible to particle accelerators. Their main signature is the production of Kaluza-Klein excitations which can be det...
1994-03-15
2009-10-28
[ "hep-ph", "hep-th" ]
I. Antoniadis, K. Benakli and M. Quir\'os
hep-ph/9403293
Timelike form factors at high energy
The difference between the timelike and spacelike meson form factors is analysed in the framework of perturbative QCD with Sudakov effects included. It is found that integrable singularities appear but that the asymptotic behavior is the same in the timelike and spacelike regions. The approach to asymptotia is quite sl...
1994-03-15
2009-12-30
[ "hep-ph" ]
T. Gousset and B. Pire
hep-ph/9403291
The Equivalence Theorem and Effective Lagrangians
We point out that the equivalence theorem, which relates the amplitude for a process with external longitudinally polarized vector bosons to the amplitude in which the longitudinal vector bosons are replaced by the corresponding pseudo-Goldstone bosons, is not valid for effective Lagrangians. However, a more general fo...
1994-03-15
2009-10-28
[ "hep-ph" ]
Carsten Grosse-Knetter and Ingolf Kuss (Universitaet Bielefeld)
hep-ph/9403289
Multisphalerons in the Weak Interactions
We construct multisphaleron solutions in the weak interactions. The multisphaleron solutions carry Chern-Simons charge $n/2$, where $n$ is an integer. The well-known sphaleron has $n=1$ and is spherically symmetric for vanishing mixing angle. In contrast the multisphalerons with $n>1$ are only axially symmetric, even f...
1994-03-15
2009-10-28
[ "hep-ph" ]
Burkhard Kleihaus and Jutta Kunz
hep-ph/9403287
Neutrino Fluxes and Resonance Physics with Neutrino Telescopes
Expected atmospheric ${\bar \nu_e}$ fluxes will result in a significant number of resonantly produced low mass hadronic vector states, as the $\rho$, in large volume neutrino telescopes. The existence of sources of higher energy neutrinos will result in the production of higher mass states, as the $D_s^*$ and the $({\b...
1994-03-15
2009-10-28
[ "hep-ph" ]
Myron Bander and H. R. Rubinstein
hep-ph/9403294
Comment on the Dispersion Relations used to Calculate $\Delta\rho$
We use the operator product expansion (OPE) to show that non-perturbative QCD corrections to $\Delta\rho$ can be calculated using unsubtracted dispersion relations for either the transverse or the longitudinal vacuum polarization functions. Recent calculations of the non-perturbative contribution to $\Delta\rho$ based ...
1994-03-15
2011-01-13
[ "hep-ph" ]
Tatsu Takeuchi, Aaron K. Grant and Mihir P. Worah
hep-ph/9403285
Spherical Shells of Classical Gauge Field and their Topological Charge as a Perturbative Expansion
We consider the classical equations of motion of $SU(2)$ gauge theory, without a Higgs field, in Minkowski space. We work in the spherical ansatz and develop a perturbative expansion in the coupling constant $g$ for solutions which in the far past look like freely propagating spherical shells. The topological charge $Q...
1994-03-14
2010-11-01
[ "hep-ph", "hep-th" ]
Edward Farhi, Valentin V. Khoze, Krishna Rajagopal, and Robert Singleton Jr
hep-ph/9403292
QCD Predictions for the Transverse Energy Flow in Deep-Inelastic Scattering in the Small x HERA Regime
The distribution of transverse energy, $E_T$, which accompanies deep-inelastic electron-proton scattering at small $x$, is predicted in the central region away from the current jet and proton remnants. We use BFKL dynamics, which arises from the summation of multiple gluon emissions at small $x$, to derive an analytic ...
1994-03-14
2009-09-25
[ "hep-ph" ]
J. Kwiecinski, A.D. Martin, P.J. Sutton and K. Golec-Biernat
hep-ph/9403283
Proof of the Equivalence Theorem in the Chiral Lagrangian Formalism
A general proof of the equivalence theorem in electroweak theories with the symmetry breaking sector described by the chiral Lagrangian is given in the $R_{\xi}$ gauge by means of the Ward-Takahashi identities. The precise form of the theorem contains a modification factor $C_{mod}$ associated with each external Goldst...
1994-03-14
2009-10-28
[ "hep-ph" ]
Hong-Jian He, Yu-Ping Kuang, Xiaoyuan Li
hep-ph/9403286
The Gerasimov-Drell-Hearn Sum Rule and Current Algebras
The status of the Gerasimov-Drell-Hearn sum rules for polarized inclusive photo-production on nucleons is reviewed. It is shown that results from currently available data compare favorably with an estimate based on an extended current algebra. Implications for integrals of spin-dependent structure functions are also br...
1994-03-14
2009-10-28
[ "hep-ph" ]
Lay Nam Chang, Yigao Liang, and Ron L. Workman
hep-ph/9403284
Hierarchical Mass Matrices in a Minimal SO(10) Grand Unification I
We consider a minimal SO(10) unified model with horizontal Peccei-Quinn symmetry. The hierarchical structure of quark-lepton mass matrices is naturally implemented by the remnants of certain irrelevant terms. Georgi-Jarlskog relations are also realized due to the horizontal symmetry.
1994-03-14
2017-02-01
[ "hep-ph" ]
Masako Bando, K.-I. Izawa, and Tomohiko Takahashi