bluuebunny/crossref_metadata_2025 huggingface dataset:
GAUGE-INVARIANT QUANTISATION OF CHIRAL GAUGE THEORIES
Authors: KIEU T. D.
Published: November 2004

The path-integral functional of chiral gauge theories with background gauge potentials are derived in the holomorphic representation. Justification is provided, from first quantum mechanical principles, for the appearance of a functional phase factor of the gauge fields in order to maintain the gauge invariance. This term is shown to originate either from the Berry phase of the first-quantized hamiltonians or from the normal ordering of the second-quantized hamiltonian with respect to the Dirac in-vacuum. The quantization of the chiral Schwinger model is taken as an example.
SECOND CLASS CONSTRAINTS IN THE BATALIN-VILKOVISKY LAGRANGIAN BRST QUANTIZATION
Authors: FISCH JEAN M. L.
Published: November 2004

The antibracket-antifield BRST formalism developed by Batalin and Vilkovisky is applied to constrained Hamiltonian systems with second class constraints. We derive an effective path integral in which first class and second class constraints are incorporated in a BRST invariant gauge fixed action. Full explicit agreement is found with the canonical path integral quantization of systems with second class constraints and, consequently, with the Lagrangian and Hamiltonian BRST quantization of first order Hamiltonian systems where the second class constraints have been eliminated by introducing the Dirac bracket.
MULTIPLICATIVE PROCESSES OF MULTIPARTICLE PRODUCTION AND LOGARITHMIC MOMENTS
Authors: DREMIN I.M.
Published: November 2004

The study of the dependence of the logarithmic moments on the rapidity bin width is advocated. It provides the typical details of the ensemble while usual (or factorial) moments are dominated by several rare configurations in it if multiparticle production is treated as a branching process.
CURIOUSER AND CURIOUSER AT INTEGER CENTRAL CHARGE
Authors: AULAKH C.S.
Published: November 2004

We give a method for determining the “coset characters” corresponding to the Goddard Kent Olive coset [Formula: see text] construction for pairs [Formula: see text] of simply laced Kac-Moody algebras of level one. These characters have well defined modular transformation properties and may be used to construct modular invariant partition functions at arbitrary integer central charge. Explicit results for pairs of algebras with unit difference in rank are given. Among the more notable cases are those of [Formula: see text], [Formula: see text], [Formula: see text] which yield [Formula: see text] characters and [Formula: see text] which corresponds to the Kosterlitz-Thouless multicritical point. The [Formula: see text], [Formula: see text] cosets and the entire series [Formula: see text] yield characters corresponding to a GSO projected Dirac fermion while [Formula: see text] corresponds to the N=2 SUSY that appears when the radius of compactification of a single boson is taken to be [Formula: see text] or [Formula: see text]. The series [Formula: see text] exhibits field identifications and thus gives characters corresponding to a radius [Formula: see text].
GAUGE MODELS OF FERMIONIC DISCRETE "STRINGS"
Authors: FILIPPOV A.T. , ISAEV A.P.
Published: November 2004

A new class of constrained hamiltonian systems with a finite number of bosonic and fermionic degrees of freedom is proposed. Coordinates of these systems are divided into two groups of independent variables analogous to the left and right movers of the standard closed fermionic string theory. Hamiltonians are obtained by gauging some subgroups of the linear supercanonical transformations for the left and right variables. It is argued that some of the new models can be regarded as discrete analogs of the standard fermionic string theory. The extension of the models obtained by adding ghost variables is also constructed as a prerequisite to quantizing them.
QUANTIZED SUPERTWISTORS, HIGHER SPIN SUPERALGEBRAS AND SUPERSINGLETONS
Authors: HEIDENREICH WOLFGANG , LUKIERSKI JERZY
Published: November 2004

We introduce supertwistors in D=3 and D=4 as describing the canonical coordinates in two models of fundamental phase space with respectively OSP(N; 4) and u(2, 2; N) invariant fundamental Poisson brackets. The infinite superalgebra of normally ordered polynomials in quantized supertwistor variables can be identified with recently proposed D=3 and D=4 higher spin superalgebras. We consider the supersingleton representations of OSP(N, 4), and OSP(2N, 8) as describing fundamental realizations of D=3 and D=4 supertwistor quantum mechanics.
ALTERNATIVE LOW ENERGY SUPERSYMMETRY
Authors: HALL LAWRENCE J.
Published: November 2004

Models of low energy supersymmetry require some additional symmetry beyond the known gauge symmetries. The usual preference for R parity, which leads to the standard low energy supersymmetry model, has no clear theoretical motivation. The alternative models with minimal field content are reviewed. In one case R parity is spontaneously broken by a large sneutrino vev. In three other cases R parity is replaced by an alternative symmetry; baryon number, lepton number or ZN.
ON CLOSED STRING COUNTERTERMS
Authors: SAADI MAHA
Published: November 2004

A one-loop tadpole and a one-loop two-string counterterms are proposed, capable of restoring BRST invariance to the respective scattering amplitudes of polyhedral closed string field theory.
POSSIBLE DEVIATIONS IN Z0 PAIR PRODUCTION AT e+e− COLLIDERS DUE TO EXOTIC LEPTON MIXINGS
Authors: NAGAWAT A.K. , SINGH SARDAR , SHARMA N.K.
Published: November 2004

The deviations from standard model predictions for the pair production of Z0 at e+e− colliders with the inclusion of mixing between ordinary and exotic leptons are evaluated for (i) the differential cross section and (ii) the longitudinal polarization asymmetry at LEP II [Formula: see text] and at possible the next linear collider [Formula: see text] energies. For heavy exotic leptons (mE ~ 250 GeV) the deviations have distinctive features that could allow the possibility of distinguishing between mirror, vector-doublet and vector-singlet type of exotic lepton mixings.
THREE GENERATIONS: A PREDICTION FULFILLED
Authors: LOPEZ JORGE L. , NANOPOULOS D.V.
Published: November 2004

We recall the theoretical arguments that led us more than ten years ago to predict that there are only three generations. Quark-lepton mass relations (mb/mτ ≈ 2.8), as universally come out from unified theories at superhigh energies (close to the Planck scale), are the key point. We further argue that fractional deviations from Nν=3 may signal new physics. The supersymmetric decay Z→ÑÑ, with Ñ the lightest neutralino and lightest supersymmetric particle (LSP), easily fits the bill. In the specific case of flipped (SU(5)×U(1)) unification, there is a strong correlation between mt≈ O(90 ± 10) GeV, slepton masses of O(50 GeV) and the closure of the Universe due to Ñ dark matter, while ΔNν ≈ (0.1–0.5).
ρ PARAMETER CONSTRAINTS ON FOURTH GENERATION QUARK MASSES
Authors: BARGER V. , HEWETT J. L. , RIZZO T. G.
Published: November 2004

Constraints on the masses of possible fourth generation quarks (a, υ) are obtained from measurements of the ρ parameter and the elements of the quark mixing matrix. Stringent mass limits are found when the off-diagonal elements Vtυ and Vab are large. For example, with mt=90 GeV and |Vtυ|≃0.5 we find ma,v≤ 300 GeV. Stronger constraints are obtained as mt or |Vtυ| increase.
SOME PERTURBATIVE RESULTS FOR TWO-DIMENSIONAL GRAVITY
Authors: MEISSNER KRZYSZTOF A. , PAWEŁCZYK JACEK
Published: November 2004

Perturbative approach to two-dimensional gravity and supergravity is considered. One-loop renormalization of the central charge of SL(2, R) Kac-Moody algebra is calculated perturbatively by functional integration and by explicit calculations of the Feynman diagrams. Also the wavefunction renormalization and the anomalous dimensions in the presence of gravity are calculated.
SUPERSYMMETRY, FOLDY-WOUTHUYSEN TRANSFORMATION AND STABILITY OF THE DIRAC SEA
Authors: MORENO MATÍAS , MARTÍNEZ RODOLFO , ZENTELLA ARTURO
Published: November 2004

It is shown that for a large class of potential problems in the Dirac equation the positive and negative energy solutions do not mix even in the strong coupling limit We prove that this property, which implies a stability of the Dirac sea, is connected to the presence of superalgebra operators in the Dirac equation. The exact and closed form for the Foldy-Wouthuysen Hamiltonian which is used to prove this property are given. The potentials include the Dirac oscillator, the uniform time-independent magnetic field and the odd potentials and its nonabelian generalizations.
GEOMETRIC CHARACTERIZATION OF STATES IN TWO-DIMENSIONAL QUANTUM GRAVITY
Authors: AGISHTEIN MICHAEL E. , JACOBS LAURENCE , MIGDAL ALEXANDER A. , RICHARDSON JOHN L.
Published: November 2004

We report first results of a large-scale simulation of two-dimensional quantum gravity using the dynamical triangulation model for systems of up to sixteen thousand triangles. Our results for the internal geometry show an unexpectedly complicated behavior of the internal volume as function of the internal radius. A simple fractal characterization is inadequate to describe the geometry of the states in the system.
WORMHOLES, THE STRONG CP PROBLEM AND PECCEI-QUINN SYMMETRIES
Authors: CHOI KIWOON , HOLMAN R.
Published: November 2004

We review some facets of the wormhole calculus developed by Coleman to explain the vanishing of the cosmological constant. We then apply this calculus to the strong CP problem and show how wormholes drive the QCD θ parameter (whose deviation from 0 or π indicates CP violation in QCD) to a CP conserving value, most likely π. We examine how the wormhole solution to the strong CP problem meshes with the Peccei-Quinn solution to this problem and show that they are in fact complementary in some sense. We also examine some of the phenomenological consequences of having θ = π.
ON THE VIOLATION OF THE JACOBI IDENTITY IN THE ALGEBRA OF FERMIONIC CURRENTS
Authors: BANERJEE R. , ROTHE H. J. , ROTHE K. D.
Published: November 2004

The problem of the violation of the Jacobi identity in the algebra of currents is reconsidered. Such a violation has recently been claimed to occur also in the case of free fermionic currents. We consider a regularization prescription for the corresponding double commutators consistent with the Jacobi identity.
INDUCED GRAVITATIONAL CHERN-SIMONS TERMS IN PARITY-VIOLATING VECTOR MODELS
Authors: YANG Z.
Published: November 2004

We compute the gravitational Chern-Simons terms induced by several vector models in D = 3. We also comment on the possible applications to the Bose-Fermi correspondence.
COSMIC STRINGS AND BARYON DECAY
Authors: GREGORY RUTH
Published: November 2004

We briefly review the current literature on baryon decay catalysis by cosmic strings, presenting a summary of the main arguments for decay catalysis.
NEW BOUNDS ON THE HIGGS SECTOR OF MINIMAL SUSY
Authors: LOPEZ JORGE L. , NANOPOULOS D.V.
Published: November 2004

We examine the Higgs sector of the minimal supersymmetric extension of the standard model. The requirement of perturbative unification combined with the recent LEP data on Higgs boson searches, excludes substantial regions of parameter space. We find that only 0.42 ≤ tan β≲0.76 and tan β≳1.30 are the allowed values for tan β=υ2/υ1. We also determine the absolute lower bound on the lightest Higgs mass to be ≈8 GeV. We conclude that improved lower bounds on the top quark mass and/or the standard model Higgs boson mass will impose yet more stringent constraints on the model. These results clearly favor tan β>1, in agreement with N=1 supergravity or superstring-inspired models.
THE QUANTUM WORMHOLE
Authors: GONZÁLEZ-DÍAZ P.F.
Published: November 2004

In order to keep the wave function for wormholes separable in a minisuperspace model, we generalize the boundary conditions recently suggested by Hawking to the light-cone.
GENERATING FUNCTION FOR 2d WZW MODEL CORRELATORS AND THE SUGAWARA CONSTRUCTION FROM THE 2+1 CHERN-SIMONS THEORY
Authors: FOCK V.V. , KOGAN YAN. I.
Published: November 2004

The vacuum state of the Chern-Simons theory in the sl(2, R) coherent states representation is a generating functional for the chiral currents and the energy-momentum tensor.
SELF-DUALITY AND N=2 STRING MAGIC
Authors: OOGURI HIROSI , VAFA CUMRUN
Published: November 2004

We consider strings with an N=2 local superconformal symmetry on the worldsheet. The critical dimension for this theory is four (two complex dimensions) with the signature (2, 2). A Kähler function giving rise to self-dual gravity is the only physical degree of freedom of this theory. Some miraculous symmetries are observed corresponding to the exchange of worldsheet and target moduli. The open and heterotic versions of this string theory correspond to self-dual Yang-Mills fields coupled to self-dual gravity in four dimensions.
ON A POSSIBLE CORRESPONDENCE OF THE NEW NARROW RESONANCES IN CHARGED PARTICLE SYSTEMS TO THE RELATIVISTIC COULOMB LEVELS IN CONTINUUM
Authors: ARBUZOV B.A. , SHICHANIN S.A. , BOOS E.E. , SAVRIN V.I.
Published: November 2004

In the paper the existence of new quasi-stationary levels in the relativistic Coulomb problem is predicted and their positions are calculated on the basis of the numerical solution of the quasi-potential equation. The results obtained are used for interpretation of the narrow electron-positron resonances revealed in heavy ions collisions and of the diproton resonances observed in neutron-proton interactions. The close relationship of the observed states with the von Neumann-Wigner levels embedded in the continuum, is indicated.
PREDICTION FOR MESONIC SPECTRUM FROM THE DISCRETE QUARK-GLUON STATES OF A FINITE SIZE BAG
Authors: DEY JISHNU , TOMIO LAURO , DEY MIRA
Published: November 2004

The mesonic spectrum from the kaon mass to 1300 MeV is fitted very well with a density of states ρ(m) calculated, without free parameters, from a partition function at a given temperature (T) obtained directly from the discrete single particle states in the bag model. The limiting T in the exponential form of the mass spectrum (known generally as the Hagedorn temperature in the context of dual resonance models) is found to vary with the mass m of the meson, being lower for the model pion and higher for other mesons. This is in qualitative agreement with heavy ion collision experiments. Although the model is expected to be good for large masses only, we find it reasonably successful in the low mass region too. The agreement for small masses in this (T≠0) model is due to significant finite size effects both in quark and gluon states, which lead to a substantial lowering of ρ for small m.
ANOMALY INDUCED Z-BOSON INTERACTIONS
Authors: GHOSH SUBIR , CHATTERJEE DEBASISH
Published: November 2004

Anomaly induced Z-boson interactions, specifically Z→γπ and e+e−→Zπ, have been studied. Both the decay rate and cross-section are quite appreciable. Possibilities of other interactions involving W±, and π± are also commented upon.
CLASSICAL p-ADIC SPACE-TIME
Authors: DRAGOVIC BRANKO G. , FRAMPTON PAUL H. , UROSEVIC BRANKO V.
Published: November 2004

A classical space-time manifold with p-adic valued coordinates is introduced and it is shown that special care is needed to distinguish space-like and time-like directions. Lorentz invariance and isometries of the manifold are derived. From a variational principle, it is shown how free particle motion satisfies a product formula.
THE PROBLEM OF THE MEAN FREE PATH OF BOUND NUCLEONS: IMPLICATIONS FOR THE NUCLEAR FORCE
Authors: COOK NORMAN D.
Published: November 2004

The mean-free-path (MFP) of bound nucleons is one of the classic problems in nuclear structure theory. Although it has often been asserted that the MFP is “long”, theoretical estimates and empirical evidence consistently show that the MFP of low-energy nucleons is less than two nucleao diameters (2–3 fm) and far shorter than the several nuclear diameters (>30 fm) needed to establish nucleons in intra-nuclear orbits. Such results indicate that the nucleon states known from nuclear spectroscopy must be explained by a version of the independent-particle model which does not require the free orbiting of nucleons within nuclei.
KINETIC APPROACH TO THE INITIAL VALUE PROBLEM IN QUANTUM FIELD THEORY
Authors: YONG LIN CHI , DE TOLEDO PIZA A.F.R.
Published: November 2004

Time-dependent projection techniques developed to derive kinetic equations in the context of the quantum many-body problem are applied to Φ4 field theory. The approach is illustrated by working out the (0+1)-dimensional case explicitly, including numerical solutions of the kinetic equations. Extension to higher dimensions is briefly discussed.
BARYOGENESIS WITHOUT BARYON NUMBER VIOLATION
Authors: DODELSON SCOTT , WIDROW LAWRENCE M.
Published: November 2004

We review a new paradigm for baryogenesis in which the fundamental Lagrangian is baryon conserving [invariant under U (1) B ]. At high temperatures, U (1)B is spontaneously broken and an excess of quarks over antiquarks of 10−10s (s≡entropy density) is produced. Today, U(1)B is restored. A fundamental consequence of our assumptions is that the baryon number of the Universe is constant. If initially zero, it will be zero today. The excess baryon number produced in the quark fields is exactly compensated by antibaryon number in a weakly interacting scalar particle. We suggest that this scalar provides the mass density necessary to close the Universe.
COMPOSITE SKYRME MODEL
Authors: CHEUNG HAY YEUNG , GÜRSEY FEZA
Published: November 2004

We propose a composite SU(2)×SU(2) Skyrme model which contains the original Skyrme model as a special case. We find that in one special case, the predicted pion decay constant is 185 MeV which is in excellent agreement with the experimental value of 186 MeV. Moreover, some other predicted static properties also agree well with the experiment, while a disagreement persists for the magnetic properties.
THE COULOMB GAS REPRESENTATION FOR SU(2) WESS-ZUMINO-WITTEN MODEL IN SUPERSPACE
Authors: TERAO HARUHIKO
Published: November 2004

We give a Coulomb gas representation for level k N = 1 supersymmetric SU(2) Kac-Moody algebra in terms of three free scalar superfields. It is clarified how this representation reduces to a Coulomb gas representation for the corresponding bosonic SU(2) Kac-Moody algebra and the free fermionic algebra. The primary superfields and the correlation functions, which satisfy the supersymmetric Knizhnik-Zamolodchikov equation, are also discussed.
COSMOGENESIS AND PRIMARY QUANTIZATION
Authors: FRAMPTON PAUL H. , VOLOVICH IGOR
Published: November 2004

It is shown that the nothing from which universes are created in third quantization theory has itself a rich substructure. We suggest a void from which the nothing arises through creation of number fields and propose a scenario based on a dynamics of number fields which can lead to a possible language to describe the Big Bang.
PROBING TOPOLOGICAL FEATURES IN PERTURBATIVE CHERN-SIMONS GAUGE THEORY
Authors: CHEN WEI , SEMENOFF G. W. , WU YONG-SHI
Published: November 2004

The topological Chern-Simons gauge theory is studied in the framework of perturbation theory. Both dimensional and F2 regularizations are used. We demonstrate the vanishing of the beta function up to three loops, the absence of diffeomorphism anomaly in the calculation of two- and three-point functions, and the validity of a topological Ward identity by finite renormalization of the coupling constant. The regularization dependence of the finite renormalization and an ambiguity in the dimensional regularization are also discussed.
GENESIS OF THE LOGNORMAL MULTIPLICITY DISTRIBUTION IN THE e+e− COLLISIONS AND OTHER STOCHASTIC PROCESSES
Authors: SZWED R. , WROCHNA G. , WRÓBLEWSKI A. K.
Published: November 2004

It has been observed that the e+e− multiplicity distributions exhibit the following properties: the dispersions are linear functions of the mean and the distributions obey the KNO-G scaling with the scaling function of the lognormal shape.

In this paper the scale invariant branching is assumed as a mechanism within which all these properties could be derived. It is shown that the lognormal shape of the scaling function can be obtained within proposed mechanism by using the generalization of the Central Limit Theorem. The dependence of the average multiplicity on energy is also derived within the postulated framework.

It is also shown that many other phenomena encountered in nature have the similar statistical properties.
THE BRST AND ANTI-BRST INVARIANT QUANTIZATION OF GENERAL GAUGE THEORIES
Authors: HULL C. M.
Published: November 2004

The Batalin-Vilkovisky procedure for the BRST invariant path-integral quantization of general gauge theories is discussed. An extension of this is given in which a path integral is constructed that is invariant under an anti-BRST symmetry as well as the BRST symmetry. It is also manifestly invariant under an Sp(2) symmetry which rotates the BRST and anti-BRST charges into one another.
THERMALIZATION IN THE EARLY UNIVERSE
Authors: ENQVIST K. , ESKOLA K. J.
Published: November 2004

We consider the rate of relaxation of an initially non-equilibrium momentum distribution towards thermal equilibrium. Numerical simulation shows that kinetic equilibrium will be reached after a few collisions. Chemical equilibrium will typically be established only much later. We find the equilibrium temperatures for the decay products of unstable particles and for initially cold Universe. In the latter case the highest equilibrium temperature in the Universe is found to be 1.2 × 1012 GeV .
NEUTRINO COUNTING WITH ONE (OR MORE) RIGHT-HANDED MAJORANA NEUTRINO
Authors: LI XUEQIAN , TAO ZHIJIAN
Published: November 2004

The recent data of ALEPH and L3 collaborations seem to indicate that the generation number is likely to be three based on the normal formula. However, we show that if one or several SU(2) singlet heavy neutrinos with both the Dirac and Majorana mass terms exist, mixing with light neutrinos can cause some variations in the neutrino counting formulation and the results imply that if the extra neutrinos are very heavy, the fourth generation is not ruled out by the present data.
ELECTRIC CHARGE QUANTIZATION AND VECTOR-LIKE FERMIONS
Authors: FOOT ROBERT
Published: November 2004

In extended gauge models with gauge group G, electric charge quantization is not always an automatic consequence of the consistency of the theory. Exotic fermions which have SU (3) ⊗ SU (2) L ⊗ U (1) invariant mass terms can provide a simple method for preserving the charge quantization feature of the standard model. This procedure is applied to the segregated isospin model.This approach indicates that precision measurements of the τ-lepton life-time and rare flavor-changing neutral processes may provide the first indications of new physics beyond the standard model.
POSSIBLE OBSERVATION OF GRAVITATIONAL EFFECTS FOR VERTICAL AND HORIZONTAL $K_S^0/K_L^0$ EVENTS AT A ϕ FACTORY
Authors: CLINE DAVID B.
Published: November 2004

Present [Formula: see text] experiments have been carried out using beams horizontal to the earths gravitational field. With the advent of a ϕ → KSKL factory, the [Formula: see text] are produced isotropically in a unique quantum state and a fraction of the events will be produced vertically with respect to the earth's field. We discuss the possible detection of gravitationally induced effects in the [Formula: see text] system and the search for new long range scalar, vector or tensor fields in nature.
RESONANT DIMESON DECAY MECHANISM IN K → ππ DECAYS
Authors: VIOLLIER R. D. , ZIMAK P.
Published: November 2004

It is shown that the ratio of the isoscalar and isotensor amplitudes, as determined from the K → ππ decay data, can be understood in terms of a resonant decay mechanism that proceeds via the weak formation of a strongly interacting resonant two quark-two antiquark system which subsequently breaks up into two pions through re-arrangement.
NON-UNITARY SUPERSYMMETRIC CONFORMAL FIELD THEORIES AND SUPERSYMMETRIC SINE-GORDON EQUATION
Authors: NAM SOONKEON
Published: November 2004

We study coset construction of superconformal minimal models using admissible representations of Kac-Moody algebra. In particular, we study supersymmetric minimal models of Wn algebra, and in particular we argue that c = −5/2 cannot be considered as a minimal model of superconformal or super-W3 algebra. In the second part of the paper, we consider superconformal field theories whose perturbations correspond to breather-breather scattering in supersymmetric sine-Gordon equations, and find a family of theories with c = −3N(4N + 3)/2(N + 1), N = 1, 2, 3, …, which is the counterpart of the family of non-unitary theories with c = −2N(6N + 5)/(2N + 3), N = 1, 2, 3, …, among which N = 1 (c = −22/5) is the Yang-Lee edge singularity.
A MICROSCOPIC MODEL FOR THE PROPAGATION OF AN OSCILLATING NEUTRINO IN MATTER
Authors: THOMSON M. J. , McKELLAR B. H. J.
Published: November 2004

The Green's function G(x; x′) for a two flavor/mass oscillating neutrino propagating through a lattice of Delta-function potentials is evaluated. The Green's function is readily put in the form of a physically interesting path integral. In the limit that the interparticle spacing is very much smaller than the vacuum oscillation length, the usual mean field result is recovered.
INTERSECTION THEORY AND TWO-DIMENSIONAL GRAVITY AT GENUS 3 AND 4
Authors: HORNE JAMES H.
Published: November 2004

We show that the k = 1 two-dimensional gravity amplitudes at genus 3 agree precisely with the results from intersection theory on moduli space. Predictions for the genus 4 intersection numbers follow easily from the two-dimensional gravity theory.
U(1) GAUGE SYMMETRY BREAKING IN A CHARGED CLOSED UNIVERSE
Authors: KIM JIHN E. , LEE TAEHOON
Published: November 2004

We obtain the consistency condition on a U(1) gauge boson mass in a charged closed universe, m2 = 8πGJ0J0/(R – 2Λ), where J0 is the charge density.
ON THE RENORMALIZATION GROUP FLOW IN N = 2 SUPERCONFORMAL MODELS
Authors: GAVA E. , STANISHKOV M.
Published: November 2004

We show that the β-function of N = 2 superconformal models perturbed by a slightly relevant chiral superfield does not have non-trivial IR fixed points to all orders in perturbation theory.
DYNAMICS IN TWO-DIMENSIONAL SPACE FOR A NEUTRON IN ELECTROMAGNETIC FIELDS
Authors: LIANG J. Q. , MARMO G. , SIMONI A. , ZACCARIA F.
Published: November 2004

The dynamics of spinning particles in electromagnetic fields is considered when it effectively takes place in a two-dimensional position space with non-trivial topology and interaction term of the Wess-Zumino type. Fractional spin configurations also occur when spin is treated as a dynamical variable.
GLUON DISTRIBUTION FROM HERA PLUS $p\bar p$-COLLIDERS
Authors: LEONIDOV A. , MIRONOV A. , ROYZEN I.
Published: November 2004

The purpose of this paper is to call experimentalists' attention to the possibility of a (almost) direct measuring of the gluon distribution at small x and large Q2 by combining the data from HERA and Tevatron or other new high energy [Formula: see text]-(super) colliders.
ALTERNATIVE SUPERSTRING LAGRANGIAN FORMULATIONS
Authors: AMORIM R. , CHAGAS-FILHO W. F.
Published: November 2004

Effective Lagrangians for the Green-Schwarz superstring are obtained by using a constrained functional integration formalism.
OBSERVATION ON THE PATH INTEGRAL DERIVATION OF THE ANOMALY
Authors: BARCELOS-NETO J. , DAS ASHOK
Published: November 2004

We point out an apparent disagreement between the perturbative and the path integral derivations of the non-Abelian anomaly in the presence of the tensor coupling.
SYMMETRY CHANGES DURING THE EVOLUTION OF THE UNIVERSE
Authors: ARIK METIN , MUNGAN MUHITTIN
Published: November 2004

This article investigates a (2 + 1)-dimensional universe evolving from a spherically symmetric spatial structure into the Kaluza-Klein structure. The implications of the symmetry change are discussed for this model in particular and also in general. It turns out that for such symmetry changes, the energy density is ill-defined for early times.
MASSIVE FERMION AND CHIRAL GAUGE SYMMETRY
Authors: AOKI SINYA
Published: November 2004

A mass-dependent odd-parity term in the effective action of chiral gauge theories as well as the usual mass-independent chiral anomaly have been shown to exist. In particular, this mass-dependent term is equal to the anomaly with opposite sign in the limit of infinite fermion mass, and therefore no odd-parity term remains in this limit. We also consider the different regularizations which produce the Wess-Zumino term in the infinite fermion mass limit.
THE q-SCHRÖDINGER EQUATION
Authors: MINAHAN JOSEPH A.
Published: November 2004

We consider the Schrödinger equation for the one-dimensional harmonic oscillator, but with the normal derivative replaced by a q-derivative. The normalizable solutions are found and the q-generalization of the Hermite polynomials is given. The free equation is also considered, but no normalizable eigenstates exist even if the system is in a box.
THE LONGITUDINAL WEAK-BOSON CONTRIBUTION TO LEPTONIC DECAYS IN THE STANDARD MODEL
Authors: LEMKE E. H.
Published: November 2004

The "longitudinal" projection [Formula: see text] of the W± propagator is analyzed in leptonic decays and found to provide a practical and sensitive measure of the accuracy of leptonic decay experiments. It is known that the standard π± decay amplitude can be ascribed to this projection. We find that the leptonic decay data do not make it possible to exhibit its effect clearly. Analogously, and this is the same, the data do not prove that weak bosons do not couple to conserved lepton currents. A verification of the effect becomes feasible by increased-precision measurements of the polarized or unpolarized spectra of the muons from the decay [Formula: see text]. This would represent a new test of the standard SU (2) × U (1) electroweak theory.
CONSEQUENCES OF A MEASUREMENT OF ELECTRON-NEUTRINO ELECTRON SCATTERING
Authors: GRIFOLS J. A.
Published: November 2004

We use the recent data on electron-neutrino electron elastic scattering to set limits on the magnetic moment and charge radius of the electron-neutrino as well as to bound the mass of the extra neutral gauge boson of E6 models.
MINIMAL DYNAMICAL SYMMETRY BREAKING OF THE ELECTROWEAK INTERACTIONS AND mtop
Authors: HILL CHRISTOPHER T.
Published: November 2004

We review the recent idea of a mechanism for dynamically breaking the symmetries of the electroweak interactions which relies upon the formation of condensates involving the conventional quarks and leptons, such as the top quark. In particular, such a scheme would indicate that the top quark is heavy, greater than or of order 200 GeV, and gives further predictions for the Higgs boson mass. It may be extended to a fourth generation with new strong TeV scale flavor-interactions.
J/Ψ PROPAGATION IN THE MIXED PHASE
Authors: PROROK DARIUSZ
Published: November 2004

We consider the J/Ψ propagation in the mixed phase of the quark-gluon plasma and the hot gas of pions. The distortion of the J/Ψ is due solely to inelastic scatterings with the hadron fraction, and no (formation) time is assumed for a [Formula: see text] pair to form a J/Ψ, here. Both the longitudinal and transverse expansions of the matter are taken into account. Also the case of the gas with ρ mesons being included is briefly reported.
CHARGE QUANTIZATION IN THE STANDARD MODEL AND SOME OF ITS EXTENSIONS
Authors: FOOT R. , JOSHI G. C. , LEW H. , VOLKAS R. R.
Published: November 2004

We review recent advances in the theoretical understanding of electric charge quantization in the Standard Model and some of its extensions. We discuss the roles played by classical constraints, gauge and mixed gauge-gravitational anomaly-cancellation and the demand of vector-like electromagnetic interactions. An attempt is made to clearly explain and contrast the points of view of various authors.
A THREE-DIMENSIONAL COVARIANT APPROACH TO MONODROMY (SKEIN RELATIONS) IN CHERN-SIMONS THEORY
Authors: BRODA B.
Published: November 2004

A genuinely three-dimensional covariant approach to the monodromy operator (skein relations) in the context of Chern-Simons theory is proposed. A holomorphic path-integral representation for the holonomy operator (Wilson loop) and for the non-abelian Stokes theorem is used.
QUANTUM CLOSED STRINGS FROM MINIMAL AREA
Authors: ZWIEBACH BARTON
Published: November 2004

Canonical and factorizable off-shell amplitudes for covariant closed string theory can be obtained from string diagrams of minimal area. Evidence is given that all higher genus minimal area string diagrams can be built using vertices and propagators, implying that the off-shell amplitudes arise from the Feynman rules of a full quantum theory of closed strings. The quantum action gives an exact solution of the full master equation of Batalin and Vilkoviski.
QUANTUM EFFECT AND OPERATOR ORDERING IN STOCHASTIC HAMILTONIAN
Authors: MOCHIZUKI RIUJI
Published: November 2004

We investigate the operator ordering in the stochastic Hamiltonian in a generalized stochastic calculation method. It is uniquely determined in the continuum limit and yields the Fokker-Planck equation without dependence on the calculation method.
ANGULAR MOMENTA IN A PLANAR FIELD THEORY
Authors: MOROZ ALEXANDER , ŠVERÁK VLADIMÍR
Published: November 2004

We compare two definitions of the angular momentum in a planar field theory having a conserved current minimally coupled to the Chern-Simons term and discuss the differences between them.
NEW AMY AND DELPHI MULTIPLICITY DATA AND THE LOGNORMAL DISTRIBUTION
Authors: SZWED R. , WROCHNA G. , WRÓBLEWSKI A.K.
Published: November 2004

Multiplicity distributions for e+e−→ hadrons recently reported by the AMY and DELPHI collaborations are compared with the data obtained at lower energies. It is proven that the new data obey the KNO-G scaling and the scaling function can be described by the lognormal distribution. The dispersions are linear functions of the mean as for the data measured at lower energies and the standardized moments (such as skewness and kurtosis) are independent of the energy. The energy dependence of the average multiplicity is described by =β sα−1.
ON SOLVING THE SCHRÖDINGER-LIKE WAVE EQUATION IN N DIMENSIONS FOR GENERALIZED SEXTIC AND OCTIC POTENTIALS
Authors: KAUSHAL R.S.
Published: November 2004

For a potential of the type [Formula: see text], where n=6, 8, we obtain an exact analytic solution of the Schrödinger-like wave equation generalized to N dimensions. We make use of an ansatz for the eigenfunction and obtain a closed form expression for the energy eigenvalues at the cost of certain constraints on the potential parameters, bk. A distinct feature for even power potentials is pointed out for the case b0=0.
FRACTIONAL FERMIONS AT LOW TEMPERATURES
Authors: KHVIENGIA Z. , TOKAREV V.F.
Published: November 2004

Fermi gas interacting with topological solitons is analyzed at low temperatures. It is shown that at high enough densities fermions become unstable and decay into the pairs of solitons with half-integer fermion number.
TIME IN A SYSTEM OF FIRST CLASS CONSTRAINT
Authors: FUKUYAMA TAKESHI , KAMIMURA KIYOSHI
Published: November 2004

We discuss a possible form of quantum mechanics and the choice of time variable for a given system of first class constraint. We examine it in a simple model similar to the mini-superspace model of gravity.
MIXED PHASE INDUCED EFFECTS ON THE J/Ψ AND χ MOMENTUM DISTRIBUTIONS
Authors: PROROK DARIUSZ
Published: November 2004

We examine the model of [Formula: see text] pair propagation in a mixed phase of the quark-gluon plasma and the pion gas. The J/Ψ and χ resonance are dealt with and the J/Ψ suppression as the composition of J/Ψ and χ disintegration is considered. The results are obtained assuming that J/Ψ and χ are able to interact with the surrounding medium from the moment of their [Formula: see text] pair creation, i.e., the notion of the formation time is not used here.
BOGOMOL’NYI EQUATIONS FOR NON-ABELIAN CHERN-SIMONS-HIGGS THEORIES
Authors: CUGLIANDOLO L.F. , LOZANO G. , MANÍAS M.V. , SCHAPOSNIK F.A.
Published: November 2004

We study the non-abelian Chern-Simons theory with spontaneous symmetry breaking. We find Bogomol’nyi type or self-dual equations for a particular choice of the Higgs potential; the corresponding vortex solutions for G=SU(2) carry both quantized electric charge Q= −en/2 and angular momentum J=nm2/4 (e is the fundamental charge, n is an integer associated with the Chern-Simons coefficient, and m is another integer which labels the topological sector). We propose a straightforward generalization to the SU(N) case.
ILLUSTRATING THE SPECTRAL FORM OF THE c-THEOREM
Authors: FREEDMAN DANIEL Z. , LATORRE JOSÉ I. , VILASÍS XAVIER
Published: November 2004

The sum rule [Formula: see text] where c1(μ, Λ) is the spectral function in the Lehmann representation of the correlator  has recently been derived for renormalizable field theories in two dimensions. We test this sum rule in three examples: the large-m limit of minimal models, the scaling Lee-Yang model and the Schwinger model.
FEIGIN-FUCHS REPRESENTATIONS OF ARBITRARY AFFINE LIE ALEGBRAS
Authors: ITO KATSUSHI , KOMATA SHIRO
Published: November 2004

We develop a systematic method to obtain the Feigin-Fuchs representations for arbitrary affine Lie algebras from a geometrical viewpoint. Choosing canonical coordinates for the flag manifolds associated with the Lie algebras, we get the general formulae for the KacMoody currents. In particular, we use this method to construct explicitly the Feigin-Fuchs representations for the affine Lie algebra of [Formula: see text] type.
$R_{e^ + e^ - } ,\,\Gamma _{had}^{Z^0 } $ AND αs: DO THE EXPERIMENTAL DATA AGREE WITH PERTURBATIVE QCD?
Authors: PREPARATA G. , RATCLIFFE P.G. , VERPELLI M.
Published: November 2004

We examine the present experimental determinations of the two related quantities: [Formula: see text] and [Formula: see text] and compare their values with the predictions of perturbative QCD. Both sets of data consistently lie systematically above the theoretical values. However, they are shown to be mutually consistent with a strong-interaction correction roughly twice the magnitude of that calculated within the framework of perturbative QCD. We conclude that this seems to point to the failure of this approach to correctly account for the non-trivial structure of the QCD vacuum and thus of long-distance effects which may pervade even the high-energy regime.
NUCLEAR POLARIZATION AND THE EQUIVALENCE PRINCIPLE
Authors: DANIELS J.M. , NI WEI-TOU
Published: November 2004

In this paper, we analyze the nuclear polarization of the spin-polarized Dy6Fe23 used in our two equivalence principle (EP) experiments. From this we infer the equivalence of polarized Dy in the earth’s gravitational field to be good to 10−3 and in the solar field to be good to 1.4×10−2. To increase the nuclear polarization in order to have better EP tests, we propose to use a dilution refrigerator to lower the temperature to 10 mK. We present a thorough analysis of our experimental scheme together with a discussion of perspectives.
THE CHIRAL ANOMALY AND THE STRONG CP PROBLEM
Authors: HUANG ZHENG , VISWANATHAN K.S. , WU DANDI
Published: November 2004

CP violation in strong interactions is re-examined on the basis of the anomaly relation with emphasis on the non-triviality of QCD vacuum. It is shown that after appropriately defining the conventional vacuum, the CP violating phases in QCD Lagrangian are subject to constraints derived from the anomaly relation. A possible solution to the strong CP problem is suggested provided that one of heavy quarks has a vanishing dynamical condensate.
CANONICAL QUANTIZATION OF A RELATIVISTIC PARTICLE WITH TORSION
Authors: NESTERENKO V.V.
Published: November 2004

The generalized Hamiltonian formalism for the relativistic particle with a torsion in a D-dimensional space-time is constructed. On this basis, the canonical quantization of the model is fulfilled. For D=3 the mass spectrum is obtained, the mass of the state being dependent on its spin. The possibility to describe the states with integer, half-integer and continuous spins in the framework of this model is discussed.
PARITY ANOMALY IN CHERN-SIMONS THEORY
Authors: KORCHEMSKY G.P.
Published: November 2004

Ultraviolet (uv) divergences are canceled in the effective action of the D=3 Chern-Simons (CS) gauge theory but regularization is needed. It is impossible to introduce gauge invariant regularization and conserve the parity of the classical action. As a result, in the limit when regularization is removed the finite contribution to the effective action induced by parity-violating regulators remains which being added to the classical action leads to additive integer-valued renormalization of the coupling constant.
MAPPING BETWEEN TODA AND KDV FLOWS IN THE HERMITIAN MATRIX MODEL
Authors: OGURA WAICHI
Published: November 2004

The scaling operators are studied at finite N. We find new singular potentials for which an orthogonal polynomial identity gives the string equation at the double scaling limit. They are free from the degeneracy between even and odd potentials, and provide the mapping between the sl(∞) Toda and the generalized KdV flows. The degeneracy in formal Virasoro conditions are derived explicitly.
A NEW SCHEME OF THE POSITRONIUM CALCULATIONS
Authors: PIVOVAROV G.B.
Published: November 2004

A notion of scheme of the positronium calculations is defined. A continuously parametrized set of such schemes is presented, and a scheme is then defined for the parameters of this set which yields a possibility to use it for the calculation of the width of a positronium state with its mass as an input parameter. Calculations in this scheme may remove the positronium width theory-experiment discrepancy.1
QUANTUM BOUNCE OF A UNIFORM DUST STAR IN NEWTON GRAVITY
Authors: ISHIHARA H. , MORITA S. , SATO H.
Published: November 2004

We investigate the quantum dynamics of a dust sphere collapsing uniformly in Newtonian gravity, in which the concept of time is obvious. The quantum bounce of the wave packet is observed by a numerical method. Our Newton Lagrangian is different from the Newtonian limit of the Einstein Lagrangian. They give the same classical equation of motion but derive the different quantum systems.
NON-PERTURBAITVE GREEN FUNCTIONS IN QUANTUM GAUGE THEORIES
Authors: SHABANOV S.V.
Published: November 2004

Non-perturbative Green functions for gauge invariant variables are considered. The Green functions are found to be modified as compared with the usual ones in a definite gauge because of a physical configuration space (PCS) reduction. In the Yang-Mills theory with fermions, this phenomenon follows from the Singer theorem about the absence of a global gauge condition for the fields tending to zero at spatial infinity.
NO GHOST THEOREM AND COHOMOLOGY THEOREM FOR STRINGS IN ARBITRARY STATIC BACKGROUNDS
Authors: GHOSHAL DEBASHIS , MUKHERJI SUDIPTA
Published: November 2004

We consider a string moving in an arbitrary time-independent background given by an arbitrary conformal field theory of appropriate central charge (e.g., c=25 for bosonic string) and one flat time-like dimension. We show that the physical subspace of the Hilbert space is positive semi-definite (no ghost theorem) and that the cohomology of the BRST operator is trivial except for the ghost number one (for open bosonic string) sector (cohomology theorem). Both the proofs are reductio ad absurdum proofs based on the corresponding theorems for the strings moving in flat background. In cases where there is an extra flat space-like dimension (besides the flat time-like one), the transverse subspace with positive-definite norm can be constructed.
QUANTUM LIE SUPERALGEBRAS AND “NON-STANDARD” BRAID GROUP REPRESENTATIONS
Authors: LIAO LI , SONG XING-CHANG
Published: November 2004

The formulae of the Faddeev-Reshetikhin-Takhtajan (FRT) method in supersymmetric case are presented transparently and consistently. With the help of these formulae, the simplest “non-standard” solution of braid group representation (BGR) is re-examined. The result shows that the hidden symmetry associated with this “non-standard” BGR is indeed the q-deformed Lie superalgebra U q ( gl (1|1)).
A W2 EFFECTIVE ACTION
Authors: RODGERS V.G.J.
Published: November 2004

It is well-known by that by studying the symplectic geometry of the underlying symmetry group, the anomalous contribution to effective actions of many systems may be extracted from the path integral. Using this fact, we are able to construct an effective action for the W2 symmetry corresponding to two interacting bosonic fields in three space-time dimensions. We consider this work to be a precursor to the study of W∞ related actions.
TIME-DELAYED APPARENT EXCESS HEAT GENERATION IN ELECTROLYSIS FUSION EXPERIMENTS
Authors: KIM Y.E.
Published: November 2004

In many recent electrolysis fusion experiments, excess heat, tritium, and neutron production have been reported as intermittent bursts. These burst phenomena are described in terms of a surface reaction mechanism involving hysteresis of deuterium solubility in palladium as a function of the metal temperature. Excess heat generation is shown to be attributable to a hitherto neglected time-delayed chemical process due to the solubility hysteresis of deuterium in palladium. Negative results of no apparent excess heat generation from light-water electrolysis experiments is attributed to the fact that the solubility hysteresis of hydrogen occurs at a higher temperature range than that for deuterium. Apparent excess heat generation is expected to be also observable in blank electrolysis experiments with light water at higher pressures.
UNIQUENESS OF GENERALIZED PARAFERMIONS
Authors: BOUGOURZI A.H. , HO-KIM Q. , KIKUCHI Y. , LAM C.S.
Published: November 2004

We give an explicit construction of the Feigin-Fuchs representations of the generalized parafermions associated with SU (n) and write down the screening charges for the parafermionic model of SU(3). We show that the two representations we use are equivalent to each other and to two other representations recently proposed.
DEFORMATION OF THE QUANTUM MECHANICAL PHASE SPACE WITH BOSONIC OR FERMIONIC COORDINATES
Authors: ZUMINO BRUNO
Published: November 2004

We describe the one-parameter deformation of the phase space of a quantum mechanical system and show that this twisted phase space is covariant under the action of the symplectic quantum group. The analogous case of a system with fermionic coordinates is also considered and the phase space is shown to be covariant under the action of the orthogonal quantum group. Twisted commutation relations occur in the description of deformed spaces or superspaces as well as in the formulation of field theories with generalized statistics. The many-parameter case is briefly discussed.
ON QUASI-EXACTLY SOLVABLE PROBLEMS AND SUPERSYMMETRY
Authors: ROY P. , VARSHNI Y.P.
Published: November 2004

We discuss the possibility of obtaining new quasi-exactly solvable systems within the framework of supersymmetric quantum mechanics.
WEAK TRANSITION FORM FACTORS IN RARE HEAVY MESON DECAYS
Authors: WU Y.L.
Published: November 2004

The transition form factors required for the rare heavy meson decays are evaluated. The model-independent absolutely normalized form factors, written in a compact form, among heavy to light and heavy to heavy meson transitions in the states such as 0−+→0−+, 1−, 0++, 1++ are given. A set of general relations among the form factors is obtained. The form factors involved in the rare B-meson decays are given as a direct application.
REMARKS ON THE MODEL WITH LOCAL U(1)V×U(1)A SYMMETRY IN TWO DIMENSIONS
Authors: WATABIKI YOSHIYUKI
Published: November 2004

We investigate a 2-dimensional model which possesses a local vector U (1)V and axial vector U (1)A symmetry. We obtain a general form of Lagrangian which possesses this local symmetry. We also investigate the global symmetry aspects of the model. The commutator algebra of the energy-momentum tensor and the currents is derived, and the central charge of the model is calculated. Supersymmetric extension of the model is also studied.