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hep-ph/9308310
Quantum Fluctuations around the Electroweak Sphaleron
We present an analysis of the quantum fluctuations around the electroweak sphaleron and calculate the associated determinant which gives the 1--loop correction to the sphaleron transition rate. The calculation differs in various technical aspects from a previous analysis by Carson et al. so that it can be considered as...
1993-08-20
2009-10-22
[ "hep-ph" ]
J. Baacke and S. Junker (Dortmund University)
hep-ph/9308302
Possible Tests of CP-Violations in $B^\pm$ Decays
Some experimental tests are suggested for possible CP-violations for decays of $B^\pm$ bosons. Especially, a detailed comparison of decays $B^+ \rightarrow D^0 \pi^+ \pi^+ \pi^-$ and $B^- \rightarrow \overline{D^0} \pi^- \pi^- \pi^+$ will lead to tests of not only CP, but also C, and P invariances.
1993-08-19
2007-05-23
[ "hep-ph" ]
S. Okubo
hep-ph/9308301
A Relativistic Constituent Quark Model
We investigate the predictive power of a relativistic quark model formulated on the light-front. The nucleon electromagnetic form factors, the semileptonic weak decays of the hyperons and the magnetic moments of both baryon octet and decuplet are calculated and found to be in excellent agreement with experiment.
1993-08-19
2011-04-15
[ "hep-ph" ]
Felix Schlumpf
hep-ph/9308300
Hydrodynamical Beam Jets in High Energy Hadronic Collisions
A study of hadronic data up to TEVATRON energies in terms of relativistic hydrodynamics indicates an extended 1-dimensional stage of the expansion which suggests a jet like behaviour of the fireball along the collision axis.
1993-08-19
2011-04-20
[ "hep-ph", "nucl-th" ]
U. Ornik, R.M. Weiner and G. Wilk
hep-ph/9308303
The Pomeron as Massive Gluons
A QCD-Pomeron composed by two non-perturbative gluons with a dynamically generated mass, is constructed in a gauge invariant way. The gluon propagator is infrared-finite. The model properly describes data on elastic scattering, exclusive $\rho$ production in deep inelastic scattering (DIS) and the $J/\Psi$-nucleon tota...
1993-08-19
2007-05-23
[ "hep-ph" ]
M.B. Gay Ducati
hep-ph/9308298
Problem of Statistical Model in Deep Inelastic Scattering Phenomenology
Recent Deep Inelastic data leads to an up-down quark asymmetry of the nucleon sea. Explanations of the flavour asymmetry and the di-lepton production in proton-nucleus collisions call for a temperature $T \approx 100$ MeV in a statistical model. This T may be conjectured as being due to the Fulling-Davies-Unruh effect....
1993-08-19
2009-10-22
[ "hep-ph" ]
Jishnu Dey, Lauro Tomio, Mira Dey
hep-ph/9308299
The Level Crossing Phenomenon with Yukawa Interactions
In the minimal model of electroweak interactions we carefully investigate the spectrum of the massive euclidean \dop \ in three, four and five dimensions ($D$) in the presence of \tly \ nontrivial \exl \ fields. More specifically we study the cases of the \inst \ ($D=4$), \sp \ ($D=3$) as well as that of the ($D=5$) \d...
1993-08-19
2009-10-22
[ "hep-ph" ]
Minos Axenides, Andrei Johansen and Holger Bech Nielsen
hep-ph/9308297
Fields in the Vicinity of a Superconducting Cosmic String
Superconducting cosmic strings may be viewed as wires of thickness $1/\Lambda$ with $\Lambda=10^{16}$ TeV. We show that the weak interactions will spread out the current to distances $r= (1/M_Z)\ln (I/M_Z)$, where $I$ is the magnitude of the current in the string. Consequences for the scattering of light by these strin...
1993-08-18
2007-05-23
[ "hep-ph" ]
Myron Bander and H. R. Rubinstein
hep-ph/9308295
Complete Next to Leading Order QCD Corrections to the Photon Structure Functions $F^\gamma_2(x,Q^2)$ and $F_L^\gamma(x,Q^2)$
We present the complete NLO QCD analysis of the photon structure functions $F_2^\gamma(x,Q^2)$ and $F_L^\gamma(x,Q^2)$ for a real photon target. In particular we study the heavy flavor content of the structure functions which is due to two different production mechanisms, namely collisions of a virtual photon with a re...
1993-08-18
2008-11-26
[ "hep-ph" ]
E.Laenen, S.Riemersma, J.Smith, W.L. van Neerven
hep-ph/9308296
Lepton Flavor Violation and the Tau Neutrino Mass
We point out that, in the left-right symmetric model of weak interaction, if $\nu_\tau$ mass is in the keV to MeV range, there is a strong correlation between rare decays such as $\tau \rightarrow 3 \mu, \tau \rightarrow 3 e$ and the $\nu_\tau$ mass. In particular, we point out that a large range of $\nu_\tau$ masses a...
1993-08-18
2009-10-22
[ "hep-ph" ]
R.N. Mohapatra, S. Nussinov and X. Zhang
hep-ph/9308290
The Sphaleron Barrier in the Presence of Fermions
We calculate the minimal energy path over the sphaleron barrier in the pre\-sen\-ce of fermions, assuming that the fermions of a doublet are degenerate in mass. This allows for spherically symmetric ans\"atze for the fields, when the mixing angle dependence is neglected. While light fermions have little influence on th...
1993-08-18
2009-10-22
[ "hep-ph" ]
Guido Nolte and Jutta Kunz
hep-ph/9308292
Cosmological Implications of Dynamical Supersymmetry Breaking
We provide a taxonomy of dynamical supersymmetry breaking theories, and discuss the cosmological implications of the various types of models. Models in which supersymmetry breaking is produced by chiral superfields which only have interactions of gravitational strength (\eg\ string theory moduli) are inconsistent with ...
1993-08-18
2008-11-26
[ "hep-ph" ]
Tom Banks, David B. Kaplan and Ann E. Nelson
hep-ph/9308291
Scalar Stoponium
We study the decays of a scalar \stst\ bound state \sigst, where \st\ is the lighter stop eigenstate. If \st\ has no tree--level 2--body decays, the dominant decay modes of \sigst\ are $gg$ or, if $m_h < \mst \ll \mstt$, a pair of light scalar Higgs bosons $h$. The best signal for \sigst\ production at hadron colliders...
1993-08-18
2007-05-23
[ "hep-ph" ]
M. Drees (Univ. of Wisconsin, Madison) and M.M. Nojiri (KEK, Japan)
hep-ph/9308289
Spinor Helicity Technique and String Reorganization for Multiloop Diagrams
Methods to apply the spinor helicity technique and string reorganization to multiloop amplitudes using the Feynman- and Schwinger-parameter representations are reviewed and expanded.
1993-08-18
2015-06-25
[ "hep-ph", "hep-th" ]
C.S. Lam
hep-ph/9308293
Detecting the Photon-Photon Interaction by Colliding Laser Beam Interferometry
The feasibility of detecting the photon-photon interaction using Fabry-Perot type laser interferometers developed for gravity wave detection is demonstrated. An ``external'' laser beam, serving as a refractive medium, is alternatively fed into the cavities of the interferometer and made to collide with the ``internal''...
1993-08-18
2007-05-23
[ "hep-ph", "gr-qc", "hep-th" ]
M. Hossein Partovi
hep-ph/9308288
Nonperturbative Contributions to the Inclusive Rare Decays $B\to X_s\gamma$ and $B\to X_s\ell^+\ell^-$
We discuss nonperturbative contributions to the inclusive rare $B$ decays $B\to X_s\gamma$ and $B\to X_s\ell^+\ell^-$. We employ an operator product expansion and the heavy quark effective theory to compute the leading corrections to the decay rate found in the free quark decay model, which is exact in the limit $m_b\t...
1993-08-18
2009-10-22
[ "hep-ph" ]
Adam F. Falk, Michael Luke and Martin J. Savage
hep-ph/9308294
Anomalous Dimensions of High Twist Operators in QCD at $N \rightarrow 1$ and large $Q^2
The anomalous dimensions of high-twist operators in deeply inelastic scattering ($\gamma_{2n}$) are calculated in the limit when the moment variable $N \rightarrow 1$ (or $x_B\rightarrow 0$) and at large $Q^2$ (the double logarithmic approximation) in perturbative QCD. We find that the value of $\gamma_{2n}(N-1)$ in th...
1993-08-18
2008-11-26
[ "hep-ph" ]
E.Laenen, E.Levin and A.G. Shuvaev
hep-ph/9308286
Quantum solitons of the nonlinear sigma-model with broken chiral symmetry
It is proved that the quantum-mechanical consideration of global breathing of a hedgehog-like field configuration leads to the dynamically stable soliton solutions in the nonlinear sigma-model without the Skyrme term. Such solutions exist only when chiral symmetry of the model is broken.
1993-08-18
2014-11-17
[ "hep-ph" ]
A.P. Kostyuk, A.P. Kobushkin, N.M. Chepilko and T. Okazaki
hep-ph/9308287
Extracting $|V_{bc}|$, $m_c$ and $m_b$ from Inclusive $D$ and $B$ Decays
Using recent results for nonperturbative contributions to the $B$ and $D$ meson inclusive semileptonic widths, a model independent extraction of $\vbc$, $m_c$ and $m_b$ is made from the experimentally measured $B$ and $D$ lifetimes and semileptonic branching ratios. Constraining the parameters of the HQET at $\CO(1/m_Q...
1993-08-17
2010-11-01
[ "hep-ph" ]
Michael Luke and Martin J. Savage
hep-ph/9308281
Single Top Production in $e\gamma$ Collisions
We study single top production in high energy $e\gamma$ collisions. The process $e\gamma\to\nu b\bar t$ can serve as a unique tool for measuring the $Wtb$ coupling. We show that allowing for realistic luminosity and backgrounds, the size of this coupling can be determined to within 10 (5)\% in an $e\gamma$ collider bui...
1993-08-17
2007-05-23
[ "hep-ph" ]
Eran Yehudai (Fermilab) and Stephen Godfrey and K. Andrew Peterson (Carleton University)
hep-ph/9308283
Corrections to Chiral Dynamics of Heavy Hadrons: (I) 1/M Correction
In earlier publications we have analyzed the strong and radiative decays of heavy hadrons in a formalism which incorporates both heavy-quark and chiral symmetries. In particular, we have derived a heavy-hadron chiral Lagrangian whose coupling constants are related by the heavy-quark flavor-spin symmetry arising from th...
1993-08-17
2009-10-22
[ "hep-ph" ]
H.Y. Cheng, C.Y. Cheung, G.L. Lin, Y.C. Lin, T.M. Yan and H.L. Yu
hep-ph/9308285
Effective lagrangian for B and D semileptonic decays
An effective lagrangian incorporating both chiral and heavy quark symmetries and describing the low momentum interactions of heavy mesons and light scalar and vector resonances is presented. Using some available data and assuming nearest pole dominance for the form factors we can calculate, at the leading order in chir...
1993-08-17
2007-05-23
[ "hep-ph" ]
N. Di Bartolomeo
hep-ph/9308284
Rotational Corrections to Axial Currents in Semibosonized SU(3) Nambu--Jona-Lasinio Model
We examine $O(1/\Ne)$ rotational corrections to axial couplings \gt~ and \go~ in the framework of the semibosonized SU(3) Nambu--Jona-Lasinio model. A novelty is due to the observation that the rotational (cranking) velocity and the rotation matrix itself do not commute within semiclassical quantization scheme. If time...
1993-08-17
2010-11-19
[ "hep-ph" ]
A. Blotz, M. Praszalowicz and K. Goeke
hep-ph/9308278
Zeros of tree amplitudes at rest and symmetries of mechanical systems
We consider the tree amplitudes of production of $n_2$ scalar particles by $n_1$ particles of another kind, where both initial and final particles are at rest and on mass shell, in a model of two scalar fields with $O(2)$ symmetric interaction and unequal masses. We find that these amplitudes are zero except for the lo...
1993-08-16
2008-11-26
[ "hep-ph" ]
M.V. Libanov, V.A. Rubakov and S.V. Troitsky
hep-ph/9308282
Does $K_L-K_S$ mass difference constraints or \\ claims new physics beyond the Standard Model?
The ratio $\Delta m_K/m_K$ within the standard model with 3 generations is calculated as a function of the CP nonconserving phase $\delta_{13}$ and the quark masses $m_c,m_t$ assuming the current values of the Cabibbo-Kobayashi-Maskawa mixing angles. We have found that varying $\delta_{13}$ and $m_c$ within the allowed...
1993-08-16
2007-05-23
[ "hep-ph" ]
F. Pisano and V. Pleitez
hep-ph/9308280
Nucleation Rates in Flat and Curved Space
Nucleation rates for tunneling processes in Minkowski and de Sitter space are investigated, taking into account one loop prefactors. In particular, we con- sider the creation of membranes by an antisymmetric tensor field, analogous to Schwinger pair production. This can be viewed as a model for the decay of false (or t...
1993-08-16
2010-11-01
[ "hep-ph", "gr-qc", "hep-th" ]
J. Garriga
hep-ph/9308279
Pseudo-Stable Bubbles
The evolution of spherically symmetric unstable scalar field configurations (``bubbles'') is examined for both symmetric (SDWP) and asymmetric (ADWP) double-well potentials. Bubbles with initial static energies $E_0\la E_{{\rm crit}}$, where $E_{{\rm crit}}$ is some critical value, shrink in a time scale determined by ...
1993-08-16
2009-10-22
[ "hep-ph" ]
Marcelo Gleiser
hep-ph/9308277
Naturally Large Tan $\beta$
We show that if there are only two Higgs doublets in the supersymmetric standard model, large $\tan\beta$ requires a fine tuning in the parameters of the Lagrangian of order ($1/\tan\beta$), which cannot be explained by any approximate symmetry. With an extended Higgs sector, large $\tan\beta$ can be natural. We give a...
1993-08-15
2009-09-15
[ "hep-ph" ]
Ann E. Nelson and Lisa Randall
hep-ph/9308276
The Electroweak Chiral Lagrangian for the Standard Model with a Heavy Higgs
The most general chiral Lagrangian for electroweak interactions with the complete set of $SU(2)_L\times U(1)_Y$ invariant operators up to dimension four is considered. The two-point and three-point functions with external gauge fields are derived from this effective chiral Lagrangian to one-loop order in a generic $R_\...
1993-08-14
2009-10-22
[ "hep-ph" ]
M.J. Herrero and E. Ruiz Morales
hep-ph/9308271
Towards a Theory of Soft Terms for the Supersymmetric Standard Model
We perform a systematic analysis of the soft supersymmetry-breaking terms arising from four-dimensional strings. The analysis does not assume any specific supersymmetry-breaking mechanism but provides a means of parametrizing our ignorance in a way consistent with some known properties of four-dimensional strings. We i...
1993-08-13
2010-02-18
[ "hep-ph", "hep-th" ]
A. Brignole, L.E. Ib\'a\~nez and C. Mu\~noz
hep-ph/9308269
Cosmic Ray Signatures of Multi-W Processes
We explore the discovery potential of cosmic ray physics experiments for Standard Model processes involving the nonperturbative production of O(30) weak gauge bosons. We demonstrate an experimental insensitivity to proton-induced processes and emphasize the importance of neutrino-induced processes. The Fly's Eye curren...
1993-08-13
2011-05-23
[ "hep-ph" ]
D.A. Morris and A. Ringwald
hep-ph/9308270
On Primordial Magnetic Fields of Electroweak Origin
We consider Vachaspati's primordial magnetic field which is generated at the electroweak phase transition. Assuming that either the gradients of the Higgs field or, alternatively, the magnetic field itself are stochastic variables with a normal distribution, we find that the resulting magnetic field has an {\em rms} va...
1993-08-13
2009-10-22
[ "hep-ph" ]
K. Enqvist and P. Olesen
hep-ph/9308275
Cubic Mass Relation in $\rm SU(3)\times U(1)$ Electroweak Theory
In the 331 model, lepton number may be explicitly broken by trilinear scalar self couplings. This leads to neutrino masses proportional to the cube of the corresponding charged lepton mass, with consequences for solar neutrinos and for hot dark matter.
1993-08-13
2009-10-22
[ "hep-ph" ]
Paul H. Frampton, Plamen I. Krastev and James T. Liu
hep-ph/9308273
One-Loop Corrections to Bubble Nucleation Rate at Finite Temperature
We present an evaluation of the 1-loop prefactor in the lifetime of a metastable state which decays at finite temperature by bubble nucleation. Such a state is considered in one-component phi^4 model in three space dimensions. The calculation serves as a prototype application of a fast numerical method for evaluating t...
1993-08-13
2010-11-01
[ "hep-ph", "hep-th" ]
J. Baacke and V. Kiselev (Dortmund University)
hep-ph/9308272
The Rare Decays $K^+\to\pi^+\nu\bar\nu$\ and $K_L\to\mu^+\mu^-$\ Beyond Leading Logarithms
We analyze the branching ratio for the FCNC mode $K^+\to\pi^+\nu\bar\nu$\ in the standard model with QCD effects taken into account consistently to next-to-leading order. This involves a two-loop renormalization group analysis for the charm contribution, presented in this paper, and the calculation of $O(\alpha_s)$ cor...
1993-08-13
2009-10-09
[ "hep-ph" ]
G. Buchalla and A.J. Buras
hep-ph/9308274
Connections between Deep-Inelastic and Annihilation Processes at Next-to-Next-to-Leading Order and Beyond
We have discovered 7 intimate connections between the published results for the radiative corrections, $\Ck$, to the Gross--Llewellyn Smith (GLS) sum rule, in deep-inelastic lepton scattering, and the radiative corrections, $\Cr$, to the Adler function of the flavour-singlet vector current, in $\ee$ annihilation. These...
1993-08-13
2009-10-22
[ "hep-ph" ]
D.J.Broadhurst and A.L.Kataev
hep-ph/9308266
The strongest experimental constraints on SU(5)xU(1) supergravity models
We consider a class of well motivated string-inspired flipped $SU(5)$ supergravity models which include four supersymmetry breaking scenarios: no-scale, strict no-scale, dilaton, and special dilaton, such that only three parameters are needed to describe all new phenomena $(m_t,\tan\beta,m_{\tilde g})$. We show that th...
1993-08-12
2009-08-25
[ "hep-ph" ]
J. Lopez, D. Nanopoulos, G. Park, and A. Zichichi
hep-ph/9308265
The Exact Renormalisation Group and Approximate Solutions
We investigate the structure of Polchinski's formulation of the flow equations for the continuum Wilson effective action. Reinterpretations in terms of I.R. cutoff greens functions are given. A promising non-perturbative approximation scheme is derived by carefully taking the sharp cutoff limit and expanding in `irre...
1993-08-12
2009-10-22
[ "hep-ph", "hep-th" ]
Tim R. Morris
hep-ph/9308268
Investigation of Long Baseline Neutrino Oscillations from Experiments at KAON
The proposed KAON factory at the Triumf Laboratory in Vancouver, Canada provides a unique opportunity for high statistics long baseline neutrino oscillation experiments. Several possibilities are under active consideration. In this paper we describe the theoretical expectations for a {\it very} long baseline experiment...
1993-08-12
2008-02-03
[ "hep-ph" ]
Scott Hayward, Martin Sevior, Nathan Weiss and Dennis Wright
hep-ph/9308263
Q^2-Dependence of the Proton's G_1 Structure Function Sum Rule
We study the $Q^2$ variation of the first moment of the nucleon's spin-dependent structure function $G_1$. As $Q^2 \rightarrow 0$ the moment is determined by the low energy theorem for Compton scattering. In the deep-inelastic region the moment is calculated using twist expansion to order $1/Q^2$. Based on these limits...
1993-08-12
2009-10-22
[ "hep-ph" ]
Xiangdong Ji and Peter Unrau
hep-ph/9308264
Radiative $B \to K^* \gamma $ transition in QCD
We evaluate the branching ratios of the radiative decays $B \to K^* \gamma $, and $B \to K_1 \gamma $ in the framework of three-point function QCD sum rules. We find: $ \Gamma(B \to K^* \gamma) / \Gamma(b \to s \gamma) = 0.17 \pm 0.05$ and $ \Gamma(B \to K_1 \gamma) / \Gamma(b \to s \gamma) = 0.30 \pm 0.15$. We also st...
1993-08-12
2009-10-22
[ "hep-ph" ]
P. Colangelo, C. A. Dominguez, G. Nardulli, N. Paver
hep-ph/9308267
Moments of the Virtual Photon Structure Function
The photon structure function is a useful testing ground for QCD. It is perturbatively computable apart from a contribution from what is usually called the hadronic component of the photon. There have been many proposals for this nonperturbative part of the real photon structure function. By studying moments of the vir...
1993-08-12
2010-11-01
[ "hep-ph" ]
Sun Myong Kim and Thomas F. Walsh
hep-ph/9308258
Astrophysical and Terrestrial Constraints on Singlet Majoron Models
The general Lagrangian containing the couplings of the Higgs scalars to Majorana neutrinos is presented in the context of singlet Majoron models with intergenerational mixings. The analytical expressions for the coupling of the Majoron field to fermions are derived within these models. Astrophysical considerations impl...
1993-08-11
2008-11-26
[ "hep-ph" ]
Apostolos Pilaftsis
hep-ph/9308259
Gauge-Symmetric Approach to Effective Lagrangians: The \eta' Meson from QCD
We present a general scheme for extracting effective degrees of freedom from an underlying fundamental Lagrangian, through a series of well-defined transformations in the functional integral of the cut-off theory. This is done by introducing collective fields in a gauge-symmetric manner. Through appropriate gauge fixin...
1993-08-11
2009-10-22
[ "hep-ph" ]
P.H. Damgaard, H.B. Nielsen and R. Sollacher
hep-ph/9308261
QCD calculation of J/psi+gamma mass distributions
We compute the J/psi+gamma invariant-mass distributions from the QCD subprocess g + g --> J/psi+gamma. At large masses, this subprocess is the dominant mechanism for J/psi+gamma production, and data could provide a good test of QCD. The mass distribution peaks at relatively small masses (3.4 - 4.0 GeV) and the subproce...
1993-08-11
2008-11-26
[ "hep-ph" ]
E.L.Berger and K.Sridhar
hep-ph/9308255
Do Search for Dibaryonic De - Excitations in Relativistic Nuclear Reactions
Some odd characteristics are observed in the single particle distributions obtained from $ He + Li $ interactions at $ 4.5 AGeV/c $ momenta which are explained as the manifestation of a new mechanism of strangeness production via dibaryonic de-excitations. A signature of the formation of hadronic and baryonic clusters ...
1993-08-11
2019-08-17
[ "hep-ph" ]
C.Besliu, V.Popa, L.Popa, V.Topor Pop
hep-ph/9308256
Study of the simplest realistic Higgs sector in quark-lepton symmetric models
A discrete symmetry between quarks and (generalized) leptons can exist in nature, and its spontaneous symmetry breaking scale can be as low as a few TeV. Such a discrete symmetry also has interesting implications for how electroweak symmetry is spontaneously broken, because the simplest version of the theory requires t...
1993-08-11
2014-11-17
[ "hep-ph" ]
Y. Levin and R. R. Volkas
hep-ph/9308257
Parton Interaction Rates in the Quark-Gluon Plasma
The transport interaction rates of elastic scattering processes of thermal partons in the quark-gluon plasma are calculated beyond the leading logarithm approximation using the effective perturbation theory for QCD at finite temperatures developed by Braaten and Pisarski. The results for the ordinary and transport inte...
1993-08-11
2009-10-22
[ "hep-ph", "nucl-th" ]
Markus H. Thoma
hep-ph/9308260
Flow Equations for N Point Functions and Bound States
We discuss the exact renormalization group or flow equation for the effective action and its decomposition into one particle irreducible N point functions. With the help of a truncated flow equation for the four point function we study the bound state problem for scalar fields. A combination of analytic and numerical m...
1993-08-11
2008-11-26
[ "hep-ph", "hep-th" ]
Ulrich Ellwanger
hep-ph/9308262
Operator Product Expansion for Inclusive Semileptonic Decays in Heavy Quark Effective Field Theory
Inclusive semileptonic decays are discussed in the framework of heavy quark effective field theory by employing the short distance expansion in the effective theory. The lowest order term turns out to be the parton model; the higher order terms may be regarded as correction terms to the parton model result. The first n...
1993-08-11
2009-10-22
[ "hep-ph" ]
Thomas Mannel
hep-ph/9308253
On the relation between Euclidean and real time calculations of Green functions at finite temperature
We find a relation between the semiclassical approximation of the temperature (Matsubara) 2-point correlator and the corresponding classical Green function in real time at finite temperature. The anharmonic oscillator at finite temperature is used to illustrate our statement, which is however of rather general origin.
1993-08-10
2009-12-30
[ "hep-ph" ]
A. Bochkarev
hep-ph/9308251
Testing the handedness of a heavy $W^{\prime}$ at future hadron colliders
We show that the associated production $pp\to W^{\prime}W$, and the rare decay $pp\to W'\to \bar\ell\ell W$ are useful tests of $W'$ couplings to fermions at future hadron colliders. For $M_{W'}\sim (1 - 3)$ TeV they would allow a clean determination on whether the $W'$ couples to $V-A$ or $V+A$ currents. As an illustr...
1993-08-10
2009-09-17
[ "hep-ph" ]
Mirjam Cvetii\v{c}, Paul Langacker and Jiang Liu
hep-ph/9308252
The Updated MSW Analysis and the Standard Solar Model Uncertainties
We update the analysis of the MSW and general astrophysical solutions to the combined solar neutrino observations by including the GALLEX II result. We also show that our parametrized flux uncertainties are equivalent to the Monte-Carlo results of Bahcall and Ulrich.
1993-08-10
2007-05-23
[ "hep-ph", "astro-ph" ]
Naoya Hata and Paul Langacker
hep-ph/9308247
Positronium Spectroscopy in a Magnetic Field
Hyperfine spectroscopy of positronium formed in the presence of a static magnetic field is considered. Generalising the situation hitherto developed in the literature, the magnetic field is not assumed to be parallel to the momentum of incoming polarised positrons, while the possibility of electron polarisation is also...
1993-08-09
2007-05-23
[ "hep-ph", "nucl-th" ]
Jan Govaerts
hep-ph/9308254
On the Hadronic Contribution to Light-by-light Scattering in $g_\mu-2$
We comment on the theoretical uncertainties involved in estimating the hadronic effects on the light-by-light scattering contribution to the anomalous magnetic moment of the muon, especially based on the analysis and results of T. Kinoshita, B. Ni\v zi\'c, and Y. Okamoto, Phys.\ Rev.\ D31, 2108 (1985). From the point o...
1993-08-09
2009-10-22
[ "hep-ph" ]
Martin B. Einhorn
hep-ph/9308250
Dynamical Electroweak Breaking: Issues and Challenges
After briefly remarking on alternatives for breaking the electroweak symmetry, I discuss the implication that recent precision experiments at LEP have for the symmetry breaking sector. The difficulties associated with generating fermion masses when the electroweak symmetry is broken dynamically are exposed and an alter...
1993-08-09
2007-05-23
[ "hep-ph" ]
R. D. Peccei
hep-ph/9308248
Signals For Parity Violation in the Electroweak Symmetry Breaking Sector
We consider the possibility of observing a parity violating but $CP$ conserving interaction in the symmetry breaking sector of the electroweak theory. We find that the best probe for such an interaction is a forward-backward asymmetry in $W^+W^-$ production from polarized $e^-_R e^+_L$ collisions. An observable asymmet...
1993-08-09
2009-10-22
[ "hep-ph" ]
S. Dawson and G. Valencia
hep-ph/9308249
Cancellation of Infrared Divergences in Thermal QED
As a preliminary step, the radiation produced by a classical charged current coupled to a quantized $A_{\mu}$ is solved. To each order in $\alpha$, all infrared divergences cancel between the virtual $\gamma$'s and the real $\gamma$'s absorbed from the plasma or emitted into the plasma. When all orders of perturbation ...
1993-08-09
2009-10-22
[ "hep-ph" ]
H. Arthur Weldon
hep-ph/9308245
Dynamical Properties of Heavy-Ion Collisions from the Photon-Photon Intensity Correlations
We consider here the bremsstrahlung emission of photons at low and intermediate energies $ E_{lab}\le 1000 MeV/u$ of the projectile. and derive expressions more general than previous results obtained by Neuhauser which were limited to the case of isotropic systems. We find that the two-photon correlation function stron...
1993-08-08
2010-11-01
[ "hep-ph", "nucl-th" ]
L.V. Razumov and R.M. Weiner
hep-ph/9308246
Inclusive Semileptonic B and Polarized Lambda_b Decays from QCD
The differential decay spectrum $d\Gamma/dE_e dq^2$ for the semileptonic decay of an unpolarized hadron containing a b-quark, and the decay spectrum $d\Gamma/dE_e dq^2 d\!\cos\theta$ for polarized $\Lambda_b$ decay are computed to second order in the $1/m_b$ expansion. Most of the $1/m_b^2$ corrections have a simple ph...
1993-08-08
2010-11-01
[ "hep-ph" ]
Aneesh V. Manohar and Mark B. Wise
hep-ph/9308244
The Decay $B\to K^*\gamma$ from QCD Sum Rules
Using the QCD sum rules approach and the complete leading--logarithmic short--distance coefficients determining the penguin--amplitude, we obtain $B(B\to K^*\gamma) = (6.8\pm 2.4)\cdot 10^{-5}$ for top--quark masses in the range (150--200) GeV and $|V_{cb}| = 0.035$ for $\tau_B = 1.5\,\text{ps}$. The ratio to the inclu...
1993-08-07
2007-05-23
[ "hep-ph" ]
Patricia Ball
hep-ph/9308243
Suppression of Bremsstrahlung at Non-Zero Temperature
The first-order bremsstrahlung emission spectrum is $\alpha d\omega/\omega$ at zero temperature. If the radiation is emitted into a region that contains a thermal distribution of photons, then the rate is increased by a factor $1+N(\omega)$ where $N(\omega)$ is the Bose-Einstein function. The stimulated emission change...
1993-08-07
2009-10-22
[ "hep-ph" ]
H. Arthur Weldon
hep-ph/9308242
Intermittency in Branching Processes
We study the intermittency properties of two branching processes, one with a uniform and another with a singular splitting kernel. The asymptotic intermittency indices, as well as the leading corrections to the asymptotic linear regime are explicitly computed in an analytic framework. Both models are found to possess a...
1993-08-07
2009-10-22
[ "hep-ph" ]
Antonio Bouzas
hep-ph/9308239
Higgs Search : Present and Future
In this talk I review theoretical bounds on mass of the Higgs scalar in the Standard Model(SM) and then summarise current experimental limits from the LEP experiments. Following this I discuss the search strategies for the SM Higgs at LEP 200 and the TeV energy \eplem\ colliders which are under discussion. This will be...
1993-08-06
2015-06-25
[ "hep-ph" ]
R.M. Godbole
hep-ph/9308238
Constraints on SUSY Masses in Supersymmetric Grand Unified Theories
Within the Minimal Supersymmetric Grand Unified Theory (MSGUT) masses of the predicted supersymmetric particles are constrained by the world averaged values of the electroweak and strong coupling constants, the lower limits on the proton lifetime,the lower limit on the lifetime of the universe, which implies an upper l...
1993-08-06
2007-05-23
[ "hep-ph" ]
W. de Boer, R. Ehret and D.I. Kazakov
hep-ph/9308234
Real Higgs singlet and the electroweak phase transition in the standard model, (UM-P-93/80, OZ-93/20)
The effective potential at finite temperature is constructed within the minimal standard model when a real Higgs singlet is added on. We find that a region of parameter space exists for which one can find a first order transition strong enough to prevent the erasure due to sphalerons of baryon asymmetry, while keeping ...
1993-08-06
2008-11-26
[ "hep-ph" ]
J. Choi and R. R. Volkas
hep-ph/9308240
Top Quark Physics at Hadron Colliders
I briefly report on what we can learn about the top quark at hadron colliders.
1993-08-06
2007-05-23
[ "hep-ph" ]
C.-P. Yuan
hep-ph/9308235
Phenomenology of Gluino Searches at the Tevatron
Present data indicates that the gluino (if it exists) must be heavier than about 95~GeV. During the next few years as the Tevatron integrated luminosity increases, gluino searches will be able to probe the mass range between 100 and 200~GeV. For masses in this range, a variety of gluino decay modes can provide viable s...
1993-08-06
2007-05-23
[ "hep-ph" ]
Howard E. Haber
hep-ph/9308237
A Monte Carlo Event Generator for W Off-shell Pair Production including Higher Order Electromagnetic Radiative Corrections
We present the Monte Carlo event generator {\tt WOPPER} for pair production of $W$'s and their decays at high energy $e^+e^-$ colliders. {\tt WOPPER} includes the effects from finite $W$ width and focusses on the calculation of higher order electromagnetic corrections in the leading log approximation including soft pho...
1993-08-06
2009-10-22
[ "hep-ph" ]
H. Anlauf, H. D. Dahmen, P. Manakos and T. Mannel, WOPPER
hep-ph/9308241
Production, Decay, and Polarization of Excited Heavy Hadrons
We discuss the production via fragmentation of excited heavy mesons and baryons, and their subsequent decay. In particular, we consider the question of whether a net polarization of the initial heavy quark may be detected, either in a polarization of the final ground state or in anisotropies in the decay products of th...
1993-08-06
2010-11-01
[ "hep-ph" ]
Adam F. Falk and Michael E. Peskin
hep-ph/9308232
The Nonabelian Debye Mass at Next-to-Leading Order
It is shown that after a resummation of leading high-temperature contributions, a complete and gauge-independent result for the nonabelian Debye screening mass at next-to-leading order can be extracted from the static gluon propagator. In contrast to previous, incomplete results, the correction to the Debye mass is fou...
1993-08-05
2009-10-22
[ "hep-ph", "hep-th" ]
A. K. Rebhan
hep-ph/9308236
Dynamics of Moving and Spinning Skyrmions
We study the intermediate- and long-range forces between moving and spinning Skyrmions, employing two different methods. One uses a relativised product ansatz for the Skyrme fields, the other models Skyrmions as triplets of scalar dipoles. The methods lead to the same finite-dimensional Lagrangian dynamical system whic...
1993-08-05
2009-10-22
[ "hep-ph", "hep-th" ]
B.J.Schroers
hep-ph/9308229
Non universality of structure functions and measurement of the strange sea density
We show that there is no real conflict between the two determinations of the strange sea density from the opposite--sign dimuon production and from the difference of the $F_2$ structure functions measured in neutrino and muon deep inelastic scattering. Once non universal sea parton densities are introduced, which take ...
1993-08-05
2009-10-22
[ "hep-ph" ]
V.Barone, M.Genovese, N.N.Nikolaev, E.Predazzi and B.G.Zakharov
hep-ph/9308228
Hadronic axion, baryogenesis and dark matter
We investigate the prospects of an extra global symmetry, added to the Standard Model in the context of baryogenesis. The $PQ$ symmetry is studied as an example. We show that the hadronic axion provides a protection of the B-asymmetry even if $B-L$=0 and that there are no limits on the neutrino masses. It is also shown...
1993-08-05
2007-05-23
[ "hep-ph" ]
Bengt-{\AA}ke Lindholm
hep-ph/9308233
Supersymmetry with Grand Unification
Supersymmetry (SUSY) has many well known attractions, especially in the context of Grand Unified Theories (GUTs). SUSY stabilizes scalar mass corrections (the hierarchy problem), greatly reduces the number of free parameters, facilitates gauge coupling unification, and provides a plausible candidate for cosmological da...
1993-08-05
2008-02-03
[ "hep-ph" ]
V. Barger, M. S. Berger, P. Ohmann, and R.J.N. Phillips
hep-ph/9308231
Factorial Moments in a Generalized Lattice Gas Model
We construct a simple multicomponent lattice gas model in one dimension in which each site can either be empty or occupied by at most one particle of any one of $D$ species. Particles interact with a nearest neighbor interaction which depends on the species involved. This model is capable of reproducing the relations b...
1993-08-05
2009-10-22
[ "hep-ph", "nucl-th" ]
T. Wettig and A.D. Jackson
hep-ph/9308230
Sizing up the Nuclear Glue in $J/\psi$-production
Nuclear gluon densities are of great importance to the physics of relativistic heavy ion collisions, in particular, in assessing the origin of $J/\psi$-suppression. We describe our attempts to distinguish various models of the gluonic EMC-effect, using the existing $J/\psi$-production data in proton-nucleus collisions....
1993-08-05
2009-10-22
[ "hep-ph" ]
R.V. Gavai and R.M. Godbole
hep-ph/9308224
Loop-Induced Majoronic Decay of Neutrinos:
In models where the suppression of the tree level couplings of fermions with Goldstone bosons is not protected by symmetry, the loop-induced couplings can in general dominate over the tree couplings. We demonstrate this by calculating the decay $\nu\to \nu' + \mbox{Majoron}$ in the simplest singlet Majoron model. It is...
1993-08-04
2007-05-23
[ "hep-ph" ]
Darwin Chang, Jiang Liu, Palash B. Pal
hep-ph/9308222
Regularization Dependence of Running Couplings in Softly Broken Supersymmetry
We discuss the dependence of running couplings on the choice of regularization method in a general softly-broken N=1 supersymmetric theory. Regularization by dimensional reduction respects supersymmetry, but standard dimensional regularization does not. We find expressions for the differences between running couplings ...
1993-08-04
2009-10-22
[ "hep-ph" ]
Stephen P. Martin and Michael T. Vaughn
hep-ph/9308221
Polarized Deformed Nuclei Studied via Coincidence Polarized Electron Scattering: The case of 21 Ne
Coincidence reactions of the type $\svec{A}(\svec{e},e'N)B$ involving the scattering of polarized electrons from deformed polarized targets are discussed within the context of the plane--wave impulse approximation. A general expression for the polarized spectral function for transitions leaving the residual nucleus in ...
1993-08-04
2009-10-22
[ "hep-ph", "nucl-th" ]
J. A. Caballero, T. W. Donnelly, G. I. Poulis, E. Garrido and E. Moya de Guerra
hep-ph/9308225
Proton Decay and Related Processes in Unified Models with Gauged Baryon Number:
In unification models based on SU(15) or SU(16), baryon number is part of the gauge symmetry, broken spontaneously. In such models, we discuss various scenarios of important baryon number violating processes like proton decay and neutron-antineutron oscillation. Our analysis depends on the effective operator method, an...
1993-08-04
2010-11-01
[ "hep-ph" ]
Palash B. Pal, Utpal Sarkar
hep-ph/9308220
Quantum Solitons with Cylindrical Symmetry
Soliton solutions with cylindrical symmetry are investigated within the nonlinear $\sigma $-model disregarding the Skyrme-stabilization term. The solitons are stabilized by quantization of collective breathing mode and collapse in the $\hbar \to 0$ limit. It is shown that for such stabilization mechanism the model, apa...
1993-08-04
2007-05-23
[ "hep-ph" ]
N.Chepilko, A.Kobushkin and A.Syamtomov
hep-ph/9308227
Temperature Dependence of the QCD Coupling
We present a one-loop calculation of a gauge invariant QCD beta function. Using both momentum and temperature renormalization group equations we investigate the running coupling in the magnetic sector as a function of temperature and momentum scale. At fixed momentum scale we find that, in contrast to $\lambda\phi^4$ o...
1993-08-04
2016-09-01
[ "hep-ph" ]
M.A. van Eijck, C.R. Stephens and Ch.G. van Weert
hep-ph/9308223
Stability of Two Doublet Electroweak Strings
Vortex solutions in the two Higgs doublet electroweak model are constructed, and their stability to small perturbations is studied. The most general perturbation is decomposed into angular momentum modes, the least stable mode is identified, and the linearised energy change of the vortex under this perturbation is calc...
1993-08-04
2009-10-22
[ "hep-ph" ]
Michael A. Earnshaw and Margaret James
hep-ph/9308226
On a precise calculation of (f_{B_s}/f_B) / (f_{D_s}/f_D) and its implications on the interpretation of B - \bar B mixing
We observe that quantities like (f_{B_s}/f_B) / (f_{D_s} /f_D) are predicted to be unity both by heavy quark and by light quark flavor symmetries. Hence, the deviation from the symmetry prediction must be simultaneously small in both symmetry breaking parameters, i.e., order of the ratio of light to heavy quarks masses...
1993-08-04
2010-11-01
[ "hep-ph" ]
Benjamin Grinstein
hep-ph/9308217
Spontaneous CP violation in the Supersymmetric Higgs Sector
Spontaneous CP--violation in the minimal supersymmetric standard model with a gauge singlet and a cubic superpotential is examined. Although the tree--level Higgs potential conserves CP, it is shown that with the inclusion of the one--loop top--quark radiative effects, CP may be broken spontaneously. The CP--violating ...
1993-08-03
2009-12-30
[ "hep-ph" ]
K.S. Babu and S.M. Barr
hep-ph/9308215
Radiative Symmetry Breaking and the Top Quark Mass in Local Supersymmetry
Exact low energy expressions are derived for the top-squark and higgs masses, taking into account radiative contributions due to a heavy top quark. Their masses are expressed as analytic functions of $m_{1/2}$, $m_{3/2}$, $m_t$ and $sin\beta$. Constraints from the radiative symmetry breaking mechanism are used then, to...
1993-08-03
2009-10-22
[ "hep-ph" ]
G.K. Leontaris
hep-ph/9308214
Critical Exponents from the Effective Average Action
We compute the critical behaviour of three-dimensional scalar theories using a new exact non-perturbative evolution equation. Our values for the critical exponents agree well with previous precision estimates.
1993-08-03
2009-10-22
[ "hep-ph" ]
N. Tetradis and C. Wetterich
hep-ph/9308213
Precocious Scaling in Antiproton - Proton Scattering at Low Energies
The scaling of the diffraction peak in antiproton--proton scattering has been investigated from near threshold up to $3\,\,\, GeV/c$ laboratory momenta.It was shown that the scaling of the differential cross sections are evidentiated with a surprising accuracy not only at high energies,but also at very low ones(e.q. $p...
1993-08-03
2019-08-17
[ "hep-ph" ]
D.B.Ion, V.Topor Pop, C.Petrascu, V.Popa
hep-ph/9308219
Two New Supersymmetric Options for Two Higgs Doublets at the Electroweak Energy Scale
Contrary to common belief, the requirement that supersymmetry exists and that there are two Higgs doublets and no singlet at the electroweak energy scale does not necessarily result in the minimal supersymmetric standard model (MSSM). Two interesting alternatives are presented.
1993-08-03
2007-05-23
[ "hep-ph" ]
Ernest Ma
hep-ph/9308212
Effective Field Theories with Instantons
We explain how nonperturbative effects can be systematically included when constructing an effective field theory. We concentrate in particular on the matching calculation, by which a low energy theory without a heavy particle degree of freedom is matched onto the full theory. The matching calculation requires some new...
1993-08-03
2009-09-11
[ "hep-ph", "hep-th" ]
Howard Georgi and Samuel T. Osofsky
hep-ph/9308218
Alignment in Gamma-Hadron Families Detected by Deep Lead X-Ray Emulsion Chambers
Alignment of main fluxes of energy in a target plane is found in families of cosmic ray particles detected in deep lead X-ray emulsion chambers. The fraction of aligned events becomes unexpectedly large for superfamilies with the total energy of gamma-quanta exceeding $10^3$ TeV. This can be considered as an evidence o...
1993-08-03
2007-05-23
[ "hep-ph" ]
I.P. Ivanenko, V.V. Kopenkin, A.K. Managadze and I.V. Rakobolskaya
hep-ph/9308216
Event shape criteria for single-lepton top signals
Single-lepton plus jets signals from $t\bar t$ production at hadron colliders generally give more spherically symmetrical events than the principal backgrounds from $W$ production. We show that sphericity and aplanarity criteria, applied to lepton plus neutrino plus four jet final states at the Fermilab Tevatron $p\bar...
1993-08-03
2009-09-15
[ "hep-ph" ]
V.Barger, J.Ohnemus, and R.J.N.Phillips
hep-ph/9308210
Two Body Non Leptonic Decays of B and B_s Mesons
We perform an analysis of two-body non leptonic decays of $B$ and $B_s$ mesons in the factorization approximation. We make use of the semileptonic decay amplitudes previously calculated on the basis of an effective lagrangian satisfying chiral and heavy quark symmetries and including spin 1 resonances. Exclusive semile...
1993-08-03
2011-08-17
[ "hep-ph" ]
A. Deandrea, N. Di Bartolomeo, R. Gatto and G. Nardulli
hep-ph/9308211
Can the Axions of Standard--like Superstring Models Solve the Strong CP Problem?
We find that there are three axions in standard--like superstring models in the four dimensional free fermionic formulation. These axions are either harmful or very heavy. Therefore, they cannot solve the strong CP problem. We show that this is a general result in superstring models with chiral generations from the $Z_...
1993-08-03
2009-10-22
[ "hep-ph" ]
Edi Halyo
hep-ph/9308209
The Supersymmetric Top-Ten Lists
Ten reasons are given why supersymmetry is the leading candidate for physics beyond the Standard Model. Ultimately, the experimental discovery of supersymmetric particles at future colliders will determine whether supersymmetry is relevant for TeV scale physics. The grand hope of supersymmetry enthusiasts is to connect...
1993-08-03
2009-09-25
[ "hep-ph" ]
Howard E. Haber
hep-ph/9308202
Neutrinos at high energy accelerators
PREAMBLE, BRIEF HISTORY AND PRELIMINARIES, QUICK REVIEW OF BASIC NEUTRINO PROPERTIES, CHARGED CURRENT NEUTRINO PROCESSES, NEUTRAL CURRENT NEUTRINO PROCESSES, VERY HEAVY NEUTRINOS, CONCLUDING SUMMARY
1993-08-02
2007-05-23
[ "hep-ph" ]
Probir Roy
hep-ph/9308204
Radiative Kaon Decays $K^\pm\to\pi^\pm\pi^0\gamma$ and Direct CP Violation
It is stressed that a measurement of the electric dipole amplitude for direct photon emission in $\kpm$ decays through its interference with inner bremsstrahlung is important for differentiating among various models. Effects of amplitude CP violation in the radiative decays of the charged kaon are analyzed in the Stand...
1993-08-02
2008-11-26
[ "hep-ph" ]
Hai-Yang Cheng
hep-ph/9308208
Non-universal soft scalar masses in supersymmetric theories
The existence of non--universal soft masses is the most general situation in supersymmetric theories. We study the consecuences that this situation has for the low--energy sparticle spectrum. In particular, we analize in detail the contribution to the scalar mass renormalization group equations of the $U(1)_Y$ D--term....
1993-08-02
2009-10-22
[ "hep-ph" ]
A. Lleida and C. Munoz
hep-ph/9308201
Equivalence of Hamiltonian and Lagrangian Path Integral Quantization: Effective Gauge Theories
The equivalence of correct Hamiltonian and naive Lagrangian (Faddeev--Popov) path integral quantization (Matthews's theorem) is proven for gauge theories with arbitrary effective interaction terms. Effective gauge-boson self-interactions and effective interactions with scalar and fermion fields are considered. This res...
1993-08-02
2009-10-22
[ "hep-ph", "hep-th" ]
Carsten Grosse-Knetter (Universitaet Bielefeld)