bluuebunny/crossref_metadata_2025 huggingface dataset:
UNIFORM SEMICLASSICAL APPROXIMATION FOR ABSORPTIVE SCATTERING SYSTEMS
Authors: HUSSEIN M.S. , PATO M.P.
Published: November 2004

The uniform semiclassical approximation of the elastic scattering amplitude is generalized to absorptive systems. An integral equation is derived which connects the absorption-modified amplitude to the absorption-free one. Division of the amplitude into diffractive and refractive components is then made possible. Relevance of our formalism to the algebraic approach to scattering theory is pointed out.
REFORMULATION OF EINSTEIN GRAVITY AS A FLAT SPACE GAUGE THEORY
Authors: JOSEPH K. BABU , SABIR M.
Published: November 2004

Based on an algebraic decomposition of a fourth rank tensor in terms of second rank tensors we suggest a reformulation of Einstein’s gravitational theory as a flat space gauge theory. This has been done by associating a curved manifold with a flat space U(2)×U(2) gauge theory. It is shown that while, in order to reproduce Einstein field equations one has to use a non-Yang-Mills action, the linearized equations follow from a Yang-Mills action. A relation between the metric and gauge fields is obtained. The consistency of the postulates is also verified.
UNIVERSAL ENTROPY OF LARGE SPHERES OF SPONTANEOUS STRINGS
Authors: KLEINERT H.
Published: November 2004

We show that large spherical surfaces in Euclidean space time made of spontaneous strings (strings with extrinsic curvature plus a spontaneously generated tension) have a universal entropy P(R2)∝(R2)d/6e−const. R2 in the limit of large dimensionality d. The power of R is universal in the sense that it is independent of the model parameter ν (normality) which characterizes the amount of Nambu-Goto tension with respect to the spontaneously generated tension (ν=∞ is the pure Nambu-Goto String).
PSEUDO-RAPIDITY DISTRIBUTIONS AT $S{\bar P}PS$
Authors: HUANG DING WEI , YEN EDWARD
Published: November 2004

The inelastic coefficient is written as a sum over different impact parameter b. An energy independent relation between h and b is suggested. The pseudo-rapidity distributions are calculated by partition temperature model.
SUPERCONDUCTIVITY IN DENSE ELECTROWEAK SYSTEM
Authors: FERRER E.J. , INCERA V. DE LA , SHABAD A. E.
Published: November 2004

The spectrum of fermions in the presence of the W-boson-condensed electro-weak liquid is obtained and nonvanishing spatial component of the fermionic polarization operator is calculated for zero 4-momentum. The manifestation of the Meissner effect is studied. The London penetration depth λL is calculated in the limit of small W-condensate amplitude. The possibility of a special phenomenon of partial magnetic screening due to the mixing angle dependence on the leptonic density is discussed in connection with the magnetic mass problem.
INTERPRETATION AND PREDICTABILITY OF QUANTUM MECHANICS AND QUANTUM COSMOLOGY
Authors: WADA SUMIO
Published: November 2004

A non-probabilistic interpretation of quantum mechanics asserts that we get a prediction only when a wave function has a peak. Taking this interpretation seriously, we discuss how to find a peak in the wave function of the universe, by using some minisuperspace models with homogeneous degrees of freedom and also a model with cosmological perturbations. Then we show how to recover our classical picture of the universe from the quantum theory, and comment on the physical meaning of the backreaction equation.
ANTIBARYON-BARYON RATIOS AS A SIGNAL FOR QUARK GLUON PLASMA FORMATION
Authors: KOCH P. , MÜLLER B. , STÖCKER H. , GREINER W.
Published: November 2004

In a previously developed non-equilibrium model for hadronization of a quark gluon plasma, we study hadronic signals for plasma formation. We find that fragmentation of gluons into quark-antiquark pairs can lead to a strong enhancement of various antibaryon to baryon ratios if a baryon-rich quark gluon plasma is formed.
KAON ELECTROMAGNETIC RADIUS
Authors: BEILIN V. A. , NESTERENKO V. A. , RADYUSHKIN A. V.
Published: November 2004

We obtain a QCD sum rule for the kaon form factor at small Q2. It determines, with a rather good accuracy, the kaon charge radius which is in agreement with the experimental value. We also discuss a sum rule for the difference [Formula: see text].
TRANSVERSE ENERGY PRODUCTION AND THE EQUATION OF STATE OF NUCLEAR MATTER
Authors: DOSS K.G.R. , GUSTAFSSON H.Å. , GUTBROD H.H. , KAMPERT K.H. , KOLB B.W. , LÖHNER H. , LUDEWIGT B. , POSKANZER A.M. , RITTER H.G. , SCHMIDT H.R.
Published: November 2004

In nuclear collisions of Au+Au , Nb+Nb and Ca+Ca at bombarding energies between 150 and 800 MeV per nucleon, transverse energy and transverse momenta of light particles are studied event by event at θ=90° in the center of mass system. At all energies, a rise of the mean transverse energy per nucleon is observed with increasing charged particle multiplicity. Particularly large values of E⊥ have been found for 3He-fragments. The hydrodynamical picture is discussed for a possible separation of the collective flow and the thermal parts of the E⊥-spectrum. From this, evidence for a rather stiff equation of state is found.
COLLECTIVE SPIN BY LINEARIZATION OF THE SCHRÖDINGER EQUATION FOR NUCLEAR COLLECTIVE MOTION
Authors: GREINER MARTIN , SCHEID WERNER , HERRMANN RICHARD
Published: November 2004

The free Schrödinger equation for multipole degrees of freedom is linearized so that energy and momentum operators appear only in first order. As an example, we demonstrate the linearization procedure for quadrupole degrees of freedom. The wave function solving this equation carries a spin. We derive the operator of the collective spin and its eigenvalues depending on multipolarity.
ON THE CREATION OF PARTICLES IN THE EUCLIDEAN REGION OF A GRAVITATIONAL THEORY WITH HIGHER-DERIVATIVE TERMS
Authors: POLLOCK M.D.
Published: November 2004

It has been shown by Rubakov et al. that particles can be created at a catastrophic rate during the process of quantum tunnelling through a potential barrier in the early Universe, signalling the breakdown of the semi-classical approximation upon which the calculations are based. Starting from the Wheeler-De Witt equation in minisuperspace, Rubakov first derived a Schrödinger equation for the matter, which implies exponential growth of the matter wave-function ΨM. This is the origin of the effect, which we consider in the theory [Formula: see text]. When ß>0 and V(ϕ)=0, and [Formula: see text], then the euclidean action SE is positive semi-definite, the semi-classical approximation remains valid, and particles associated with [Formula: see text] cannot be created unless the associated hamiltonian HM possesses negative eigenvalues. In lorentzian space-time we obtain the usual Schrödinger equation for ΨM, which is an important result.
SU(2/2) AND FIVE DIMENSIONAL SUPERGRAVITIES
Authors: KIM CHANG-HO , l’YI W.S. , KIM KEE YONG , KIM YONGDUK , PARK YONG-JAI
Published: November 2004

We apply SU(2/2) superalgebra to five dimensional supergravity. Pure supergravity multiplets, Maxwell multiplets and hypermultiplets are identified with either typical or atypical representations of SU(2/2). All possible representations describing supermultiplets are presented.
KASNER-TYPE SOLUTION IN A HIGHER-DERIVATIVE GRAVITY THEORY
Authors: LEE CHUL H. , LEE HYUN KYU
Published: November 2004

We study how the curvature squared terms, which may be included in the gravitational action, affects cosmology. We show, in particular, that the resulting higher-derivative gravity theory in 5 space-time dimensions admits a unique Kasner-type solution which represents three static space dimensions and one expanding space dimension.
$B^0 - \bar B^0 $ MIXING IN A SUPERSYMMETRY-INSPIRED TWO HIGGS DOUBLET MODEL
Authors: RAYCHAUDHURI AMITAVA , RAYCHAUDHURI SREERUP
Published: November 2004

A supersymmetry-motivated two Higgs doublet model with equal vacuum expectation values for the two neutral Higgs and with a physical charged Higgs mass of 80–100 GeV is carefully examined in the context of its implications for [Formula: see text] mixing. Even with this conservative choice of Higgs parameters, the lower bound on the top quark mass coming from the ARGUS data is found to be considerably relaxed. An upper bound is also set, using results from CLEO and Mark II.
IS THERE A NEW PSEUDOSCALAR PARTICLE?
Authors: SAMUEL MARK A.
Published: November 2004

The decay rate of orthopositronium has recently been measured in a new high precision experiment. The result is 10 standard deviations above the theoretical value. It is shown that a light neutral pseudoscalar R may resolve this discrepancy and still be consistent with the anomalous magnetic moments of the electron and the muon. If the mass mR≤5.7 keV , then the existence of this proposed particle R is consistent with the beam-dump experiments. The lifetime of R is large, τ≥0.14 s.
FOURFOLD ENERGY CORRELATION IN HIGH ENERGY e+e− ANNIHILATION
Authors: CSIKOR F. , PÓCSIK G. , DHINA M.
Published: November 2004

Energy-energy correlation asymmetry (AEEC) and planar triple energy correlation (PTEC) measurements have proven to provide viable ways of testing QCD and determining αs in high energy e+e− annihilation. Both AEEC and PTEC are mainly sensitive to the 3 parton final states, i.e. only small [Formula: see text] corrections are obtained. In this note, we propose that an experimental determination of the integrated fourfold energy correlation (FEC) is a natural way of testing QCD or determining αs from 4 parton final states, i.e. at [Formula: see text]. At the parton level FEC is [Formula: see text]. Results of MC simulations of parton fragmentation at PETRA/PEP and LEP/SLC energies show that the rates of the [Formula: see text] contributions remain large. Present e+e− statistics should be sufficient to determine the FEC experimentally.
A LOWER LIMIT TO THE SIZE OF COMPACTIFIED UNIVERSE
Authors: FANG L.Z. , LIU Y.L.
Published: November 2004

The length scale of a compactified universe, such as T3 universe, is discussed from the view point of observational cosmology. It has been shown, from the result of identification of quasar’s opposite pairs, that the size of the present universe should be larger than about [Formula: see text] Mpc.
TWO-LOOP BETA FUNCTION IN THE OPEN STRING SIGMA MODEL AND EQUIVALENCE WITH STRING EFFECTIVE EQUATIONS OF MOTION
Authors: ANDREEV O.D. , TSEYTLIN A.A.
Published: November 2004

We consider the sigma-model on the disc corresponding to the open bose string in external abelian vector field and compute the order ∂3F3-terms in its two-loop β-function. The vanishing of the two-loop β-function (modulo diffeomorphism and gauge terms) is shown to be equivalent (to the given order) to the equation of motion for the string theory effective action reconstructed from the string scattering amplitudes.
PARTICLE CREATION BY COSMIC STRINGS
Authors: SAHNI VARUN
Published: November 2004

The creation of particles by a nonstationary gravitational field during the formation of a straight, static cosmic string has been investigated and the contribution to the number density of created particles from modes with the lowest angular quantum number assessed. It is found that for GUT scale strings the energy density of created particles is many orders of magnitude smaller than the corresponding energy density of radiation at GUT times.
SPONTANEOUS CONTRACTION
Authors: CHO Y.M. , PAC P.Y.
Published: November 2004

The phenomenon of a spontaneous contraction in higher-dimensional geometric theories of Kaluza-Klein type is discussed which could lead to a spontaneous decompactification of the internal space. In a spontaneous contraction, an isometry G is contracted to G′ by the vacuum which often breaks G′ further down to H spontaneously.
CONFORMAL FIELD THEORIES COUPLED TO 2-D GRAVITY IN THE CONFORMAL GAUGE
Authors: DAVID F.
Published: November 2004

The coupling of conformal field theories to 2-d gravity may be studied in the conformal gauge. As an application, the results of Knizhnik, Polyakov and Zamolodchikov for the scaling dimensions of conformal fields are derived in a simple way. Their conjecture for the susceptibility exponent γ of strings is proven and extended to arbitrary genus surfaces. The result agrees with exact results from random lattice models.
ANOMALOUS DIVERGENCE OF THE GAUGE CURRENT IN CHIRAL GAUGE THEORIES
Authors: TRINCHERO R.C.
Published: November 2004

We consider the anomalous divergence of the gauge current for SU (N) chiral gauge theories in four dimensions. The contribution of all possible counterterms satisfying some general requirements is evaluated. We obtain an anomalous divergence depending on eight arbitrary parameters.
CONSTRUCTION OF HILBERT SPACE IN THE ANOMALOUS GAUGE THEORY
Authors: PARK D.K. , KIM W.T. , CHO B.H.
Published: November 2004

We analyze the abelian and non-abelian anomalous gauge theory through the BRS approach. We construct the positive norm Hilbert space and obtain the physical fields in the abelian case. By the same method, we construct the physical subspace in the non-abelian case for a=2. Finally, we discuss the physical observables and other related problems.
REINTERPRETATION OF THE NON-LINEAR SIGMA MODEL WITH TORSION
Authors: GEGENBERG J. , KELLY P.F. , MANN R.B. , MCARTHUR R. , VINCENT D.
Published: November 2004

It is shown that the bosonic non-linear sigma model with torsion may be reinterpreted as a non-linear sigma model formulated on an algebraically extended two-dimensional worldsheet. The torsion term arises naturally as a consequence of the extended geometry. The two models, while locally equivalent, have distinct global features.
ON 2D (SUPER) GRAVITY IN THE LIGHT-CONE GAUGE
Authors: GRUNDBERG J. , NAKAYAMA R.
Published: November 2004

We derive the light-cone gauge formulation of 2D gravity recently discussed by Polyakov in a way which relates it to the conformal gauge. This formulation is extended to (1, 1) supergravity.
EFFECTIVE ACTION FOR QUANTUM GRAVITY IN TWO DIMENSIONS
Authors: YOSHIDA K.
Published: November 2004

The generating functional of the correlation functions of the stress energy tensor in conformal field theory is derived and shown to be equal to the effective action for 2-dimensional induced gravity in the light cone gauge recently given by Polyakov. Seeking the condition for consistent quantization for such an action, one arrives at a chiral SU (2) × SU (2) current algebra. The corresponding Kac-Moody algebra has the central charge given by k = (C − 26)/6.
1-LOOP EFFECTS IN 4-d SUPERGRAVITY GENERATED BY HETEROTIC STRINGS ON ASYMMETRIC ORBIFOLDS
Authors: PÉREZ MERCADER J.
Published: November 2004

We consider the class of N = 1, d = 4 supergravity theories generated in the compactification of heterotic superstrings on asymmetric orbifolds. We study the dominant quadratic contribution to the 1-loop effective potential and find it to be negative. We also examine the mass term for the chiral fields and find that they are massless at the compactification scale. We show that it is possible to have models where, at the compactification scale, the cosmological constant, the gaugino masses and the masses for the chiral non-gauge singlet fields are all zero.
TOWARD SOLVABLE 4-DIMENSIONAL CONFORMAL THEORIES
Authors: FURLAN P. , PETKOVA V. B.
Published: November 2004

The Symanzik representation, based on the Mellin transform, is explored to analyze the asymptotic behavior of conformal invariant n-point functions, constructed through a generalization to arbitrary (even) space-time dimension of the two-dimensional Coulomb gas representation.
DIMENSIONAL REDUCTION OF SYMMETRIC HIGHER SPIN ACTIONS I: BOSONS
Authors: RINDANI S. D. , SAHDEV D. , SIVAKUMAR M.
Published: November 2004

The dimensional reduction of massless gauge-invariant free Lagrangians for totally symmetric and totally antisymmetric tensors of arbitrary integral spins is carried out for the covariant and light-cone gauges. The structure of the auxiliary fields for the massive Lagrangians so obtained is elucidated.
EQUIVALENCE OF FOUR DIMENSIONAL (SUPERSYMMETRY)2 PARTICLE MODELS
Authors: GATES S. JAMES , MAJUMDAR PARTHASARATHI
Published: November 2004

The superparticle model with Siegel's modification is generalized to include a one-dimensional local world line supersymmetry. The constraints of the model are shown to yield a Poisson bracket algebra that closes. The quantization of the system in the light cone gauge produces a spectrum of states identical to that obtained for the spinning superparticle model without Siegel's modification.
NON-STANDARD BOSONIZATION TECHNIQUES IN CONFORMAL FIELD THEORY
Authors: KIRITSIS ELIAS B.
Published: November 2004

It is shown that G/H models can be constructed in terms of a number of free bosons with a stress energy tensor that contains vertex operators. Generalizations of this technique are also discussed.
FRACTIONAL TOPOLOGICAL CHARGE AND TORONS IN SUPERSYMMETRIC O(3) σ-MODEL AND IN GAUGE THEORIES
Authors: ZHITNITSKY A. R.
Published: November 2004

The new class of self-dual solutions with a fractional topological number in the 2d O(3) σ-model and 4d SUSY gluodynamics (SYM) are considered. The corresponding contribution to fermion condensate [Formula: see text] has finite nonzero value.
A NOVEL INTERPRETATION OF THE ANOMALY NUMBER c
Authors: FUNG M. K.
Published: November 2004

We have derived an asymptotic formula relating the multiplicity number g(n) to the anomaly number c. We have also showed that this interpretation is related to the finite size effect.
A SUPERCONFORMAL THEORY OF MASSLESS HIGHER SPIN FIELDS IN D=2+1
Authors: FRADKIN E.S. , LINETSKY V. YA.
Published: November 2004

We construct a superconformal theory of higher spin fields in a space-time of dimension D=2+1. The construction relies on the infinite-dimensional superalgebra shsc (N/3) with the superconformal algebra OSp (N/4) as a maximal finite-dimensional subalgebra. The invariant Chern-Simons action for the higher spin superconformal theory is an extension of the usual conformal supergravity action for particles with maximal spin two.
ON PARASUPERSYMMETRIC COHERENT STATES
Authors: BECKERS J. , DEBERGH N.
Published: November 2004

We determine a parasupersymmetric annihilation operator for the (l-dimensional) harmonic oscillator and construct its eigenstates leading to a basis of parasupersymmetric coherent states with expected degeneracies according to the work of Rubakov and Spiridonov.
ASYMPTOTICS OF THE ALTARELLI-PARISI-LIPATOV EVOLUTION KERNELS OF PARTON DISTRIBUTIONS
Authors: KORCHEMSKY G.P.
Published: November 2004

The asymptotics of the evolution kernels Pab(z) of parton distributions is investigated as z→1. It is proven that to all orders of perturbative QCD, [Formula: see text] where [Formula: see text] is the cusp anomalous dimension of the contour functionals in the fundamental (α=“quark”) and adjoint (α=“gluon”) representations of gauge group and, to the lowest orders, Cα are related to the anomalous dimension of a quark field in the axial gauge and the beta function of QCD by a simple equation.
GENERAL VIRASORO CONSTRUCTION ON AFFINE g
Authors: HALPERN M.B. , KIRITSIS E.
Published: November 2004

We study the general Virasoro construction [Formula: see text] on the currents of affine g, obtaining the master equation for the inverse inertia tensor Lab. Sugawara and coset constructions are only the simplest solutions of this system, as illustrated here by a class of generalized spin-orbit constructions with generically irrational central charge.
STOCHASTIC INTERPRETATION OF POSITION-MOMENTUM UNCERTAINTY RELATION
Authors: HAJRA K.
Published: November 2004

Heisenberg’s uncertainty relation is derived here from Nelson’s stochastic quantization procedure introducing Brownian motion in the internal space of a particle apart from that in the external space. This helps us to have a relativistic generalisation of Nelson’s formalism when a relativistic quantum particle appears to be a stochastically extended one. The nonrelativistic formalism is obtained in the sharp point limit. Quantum probability is found to be a manifestation of the internal geometry in this sharp point limit.
FLAVOR MIXING AND THE UA(1) ANOMALY
Authors: ALKOFER R. , ZAHED I.
Published: November 2004

The relevance of the UA(1) anomaly is discussed in the context of models with constituent quarks. It is argued that at the mean-field level (large Nc), the inclusion of the UA(1)anomaly does not necessarily lead to flavor mixing as generally believed. Arguments are presented for the generic character of flavor dynamics at low energy and the complex origin of flavor mixing in relation to the bulk properties of the QCD vacuum.
ADELIC STRING AND SUPERSTRING AMPLITUDES
Authors: RUELLE Ph. , THIRAN E. , VERSTEGEN D. , WEYERS J.
Published: November 2004

Four point amplitudes in open strings and superstrings are shown to factor in an infinite number of ways as Euler products of p-adic amplitudes. All these “adelic” formulae follow from the functional equation for Dirichlet L-functions.
COVARIANT QUANTIZATION OF MASSLESS SUPERPARTICLE IN 4-DIMENSIONAL SPACE-TIME: TWISTOR APPROACH
Authors: PLYUSHCHAY M.S.
Published: November 2004

With the help of Penrose twistor approach by introducing the auxiliary “Stückelberg” degrees of freedom, the “extended” model of massless superparticle is constructed in 4-dimensional space-time, which is equivalent to the original Brink-Schwarz model. The covariant operator quantization of the obtained system is performed in the cases of N=1 and extended supersymmetries. It is shown that there are three independent schemes of quantization of the system at even N, one of which becomes anomalous at odd N.
THE NONABELIAN CHERN-SIMONS TERM WITH SOURCES AND EXOTIC SOURCE STATISTICS
Authors: BALACHANDRAN A.P. , BOURDEAU M. , JO S.
Published: November 2004

A system of N identical nonabelian sources interacting with a nonabelian vector potential in 2+1 dimensions is considered. The Lagrangian for the potential is the Chern-Simons term. All solutions of the field equations are constructed. The statistics of the sources is found to exhibit several novel features. In particular, it depends on the potential by which they interact and is not unique. For the gauge group SU(2), among the possible statistics is that of a 1/2 fermion. Self interaction is explicitly shown to generate an intrinsic spin for the nonabelian source just as for the abelian source. Although only the group SU(2) is considered in detail in this paper, most of its results generalize to other groups.
COVARIANT DERIVATIVE EXPANSION FOR NON-LINEAR σ-MODEL WITH TWO MULTIPLETS
Authors: HOSOKAWA MIZUHIKO , ISHIZUKA WATARU , KIKUCHI YUKIO
Published: November 2004

The covariant derivative expansion is generalized to the case of two multiplets in the non-linear σ-model.
NEW CONNECTIONS BETWEEN STRING THEORIES
Authors: DAI JIN , LEIGH R.G. , POLCHINSKI JOSEPH
Published: November 2004

We consider the R→0 limit of toroidal compactification in various string theories. This leads to new connections between seemingly different string theories: IIA and IIB, open and closed, oriented and unoriented. We also find two new extended objects which can couple consistently to strings: the Dirichlet-brane and the orientifold plane.
DIMENSIONAL DEPENDENCE OF CHIRAL-SYMMETRY- BREAKING PHASE TRANSITION IN QUENCHED PLANAR QED
Authors: KONDO KEI-ICHI , NAKATANI HAJIME
Published: November 2004

We consider the critical behavior of the phase transition associated with the spontaneous breaking of chiral-symmetry in (QED) D, in the framework of the Schwinger-Dyson equation. Special attention is paid on the scaling law. While it is well known that quenched planar QED 4 obeys the Miransky scaling of the essential singularity type, our numerical calculations show that QED 5 and QED 6 do obey the mean-field type scaling, even in the quenched planar approximation. Thus the essential singularity type scaling in the cutoff QED is considered to be possible only when D=4 under the quenched planar approximation.
NON-ABELIAN CHERN-SIMONS TERM AND STATISTICS OF G/H SOLITONS
Authors: GUPTA K.S. , LANDI G. , RAI B.
Published: November 2004

The CP1 Hopf term responsible for exotic spin and statistics for the solitons in that model can be thought of as an abelian Chern Simons term due to the fact that CP1 is an example of G/H models (CP1=SU(2)/U(1)). This leads us to consider, for any G/H model, a non-abelian CS term (for the gauge group H). We analyze the consequences of such a term for the statistics of solitons in G/H models. With a suitable point particle limit of soliton configurations, we find that solitons obey anyon-like statistics.
RECENT DEVELOPMENTS IN THE FIFTH FORCE
Authors: FISCHBACH EPHRAIM , TALMADGE CARRICK
Published: November 2004

We review recent experimental searches for deviations from Newtonian gravity, which could arise from a postulated “fifth force”. New theoretical ideas on the origins and phenomenology of a possible fifth force are also discussed.
CONSTANTS AND CORRELATIONS IN THE COLEMAN CALCULUS
Authors: MYERS ROBERT C. , PERIWAL VIPUL
Published: November 2004

The argument used by Coleman to claim the vanishing of the cosmological constant requires a prescription for comparing different zeroes. The predicted low energy physics will differ depending upon the particular regulator used to make this comparison. We also elucidate the interpretation of the measure by calculating some correlation functions.
ON THE CONTINUOUS LIMIT OF THE EIGHT-VERTEX MODEL
Authors: DESTRI C. , DE VEGA H.J.
Published: November 2004

The continuous limit of the eight-vertex model is shown to give solely the Massive Thirring Model (MTM). More precisely, using the light-cone lattice approach we find a whole class of lattice spacing (a) dependences in the eight vertex parameters (θ, γ, k) yielding a relative field theory in the a=0 limit. This turns out to be the MTM with no dependence on k. The exact excitation spectrum calculation presented here lead to these conclusions. Analogous results are reached from a perturbative renormalization group study of the anisotropic current-current continuum fermion field theory.
CONSISTENT QUANTIZATION OF A CHIRAL GAUGE THEORY IN FOUR DIMENSIONS
Authors: MIYAKE SHOGO , SHIZUYA KEN-ICHI
Published: November 2004

Using a gauge-symmetric formulation of anomalous gauge theories, we study the consistency and symmetry contents of a chiral gauge theory in four dimensions. The gauge symmetry, restored by the inclusion of the Wess-Zumino term, is spontaneously broken and the gauge field acquires a mass. Symmetry arguments are used to determine the particle spectrum and the current algebra of the model. Our analysis indicates that, apart from a question of renormalizability, the present theory is a consistent gauge theory.
STRING FIELD THEORY
Authors: KAKU MICHIO
Published: November 2004

String theory has emerged as the leading candidate for a unified field theory of all known forces. However, it is impossible to trust the various phenomenological predictions of superstring theory based on classical solutions alone. It appears that the crucial problem of the theory, breaking ten dimensional space-time down to four dimensions, must be solved nonperturbatively before we can extract reliable predictions.

String field theory may be the only formalism in which we can resolve this decisive question. Only a rigorous calculation of the true vacuum of the theory will determine which of the many classical solutions the theory actually predicts. In this review article, we summarize the rapid progress in constructing string field theory actions, such as the development of the covariant BRST theory.

We also present the newer geometric formulation of string field theory, from which the BRST theory and the older light cone theory can be derived from first principles. This geometric formulation allows us to derive the complete field theory of strings from two geometric principles, in the same way that general relativity and Yang-Mills theory can be derived from two principles based on global and local symmetry. The geometric formalism therefore reduces string field theory to a problem of finding an invariant under a new local gauge group we call the universal string group (USG).

Thus, string field theory is the gauge theory of the universal string group in much the same way that Yang-Mills theory is the gauge theory of SU (N). Thus, the geometric formulation places superstring theory on the same rigorous group theoretical level as general relativity and gauge theory.
SURVEY OF PRESENT AND FUTURE TESTS OF CP VIOLATION
Authors: DONOGHUE JOHN F. , HOLSTEIN BARRY R. , VALENCIA GERMAN
Published: November 2004

We review the present status of CP violation and critically assess the various tests of this symmetry which have been proposed. Future progress in the subject requires new experimental information distinct from the present measurement of the parameter ε. We find that there exist experiments which are potentially feasible, although all such experiments are reasonably difficult. The theoretical analysis of the various CP-odd observables is reviewed and in many cases updated.
LOCALITY PROPERTIES OF GENERATORS OF INTERNAL SYMMETRY WITH NONNEGATIVE SPECTRUM
Authors: ŁOPUSZAŃSKI JAN
Published: November 2004

It is shown that a generator of internal symmetry with nonnegative real spectrum is never local with respect to the underlying irreducible set of local fields.
RENORMALIZABLE N = 2 SUPERSYMMETRIC AND GAUGE INVARIANT INTERACTIONS FROM THE N = 2 HARMONIC SUPERSPACE WITH CENTRAL CHARGES
Authors: SAIDI E. H.
Published: November 2004

The N = 2 harmonic superspace in the presence of central charges is developed. Renormalizable interactions unusual in N = 2 supersymmetric theories are derived in a consistent way. Symmetries generated by the central charges are discussed. A certain equivalence between N = 2 harmonic superspace with and without central charges is established. An Abelian generalization of the model is given.
SMALL t PHYSICS AT THE TEVATRON COLLIDER
Authors: Bertani M. , Giacomelli G. , Mondardini M. , Zuchelli S. , Maleyran R. , Manarin A. , Amos N. , Desalvo R. , Orear J. , York T. , Baker W. , Eartly D. , Lennox A. , Negret J. , Pruss S. , Rubinstein R. , Ellsworth R. , Dimitroyannis D. , Goodman J. , Yodh G. , Block M. , Donati A. , Guss C. , Shukla S.
Published: November 2004

The first physics run of the superconducting Tevatron Collider at Fermilab ended this morning. I will present a status report on the progress of the small angle elastic scattering and total cross section experiment, E710. The goals of this experiment are to measure the total proton-antiproton cross section from √s=300 to 2000 GeV, the slope of the diffraction peak and ρ, the ratio of the real to imaginary part of the forward scattering amplitude, at these energies.
Probing the Higgs Sector at the SSC: the Standard Model and Beyond
Authors: GUNION J.F. , HABER H.E.
Published: November 2004

We survey recent developments in techniques for searching for the Standard Model Higgs boson. We also discuss theories that go beyond the Standard Model, and illustrate the extent to which Higgs search strategies must be altered, with respect to the Standard Model approaches, in order to probe the associated Higgs sectors.
Decays of Higgs Bosons to Neutralinos and Charginos in the Minimal Supersymmetric Model: Calculation and Phenomenology
Authors: GUNION J.F. , HABER H.E. , Drees M. , Tata X. , Godbole R. , Karatas D. , Tracas N.
Published: November 2004

We give explicit formulas for the decays of the Higgs bosons of the minimal supersymmetric model to neutralinos and charginos. The important features of these decays are illustrated and their phenomenological implications discussed. When phase space allowed, this class of two-body decays is at least as important as, and often dominates, other types of Higgs decay modes, such as WW or ZZ and heavy fermion anti-fermion channels.
WEAK GAUGINO PRODUCTION AT THE SSC
Authors: Arnowitt R. , Barnett R.M. , Nath Pran , Paige F.
Published: November 2004

The prospect for the detection of supersymmetry from the trileptonic signal arising from the [Formula: see text] final state in PP collisions at SSC is examined. The most severe background arises from the leptonic modes coming from [Formula: see text] final state decays. In addition a new phenomenon emerges at SSC energies in that normally hadronically quiet events are associated with considerable background hard jet activity. Cuts are proposed to drastically reduce the [Formula: see text] background. Preliminary estimates indicate that the supersymmetric trileptonic signal should be detectable for Wino mass up to 80 GeV over a wide range of the t-quark mass.
EXCITED QUARK PRODUCTION AT HADRON COLLIDERS
Authors: BAUR U. , HINCHLIFFE I. , ZEPPENFELD D.
Published: November 2004

Composite models generally predict the existence of excited quark and lepton states. We consider the production and experimental signatures of excited quarks Q* of spin and isospin 1/2 at hadron colliders and estimate the background for those channels which are most promising for Q* identification. Multi-TeVpp-colliders will give access to such particles with masses up to several TeV.
Discovery Limits of New Gauge Bosons of SpL(6)×U(1)
Authors: Barger V. , Deshpande N.G. , Kuo T. , Bagneid A. , Pakvasa S. , Whisnant K.
Published: November 2004

We present production cross-sections for additional gauge bosons W′ and Z′ of Sp L (6)× U (1) Gauge Group at the SSC.
Simulating SSC Event Detection
Authors: Blair R.E.
Published: November 2004

The author, a novice user of the CERN detector simulation package GEANT1), offers a very brief summary of some of the strengths and weaknesses the program, along with some indications of what must be done to implement a useful detector simulation for the SSC energy scale.
$\overline{\rm GL}(4, {\bf R})$ GROUP-TOPOLOGY, COVARIANCE AND CURVED-SPACE SPINORS
Authors: NE’EMAN YUVAL , ŠIJAČKI DJORDJE
Published: November 2004

The existence of a topological double-covering for the GL (n, R) and diffeomorphism groups is proven. These groups do not have finite-dimensional faithful representations. Common mistakes in the literature are corrected. A theorem concerning an [Formula: see text] inner automorphism is proven, allowing for the construction of the corresponding infinite-component spinor fields. The effect of covariance on the Hilbert space is explained.
LINEAR MULTIPLETS AND SUPER CHERN-SIMONS FORMS IN 4D-SUPERGRAVITY
Authors: CECOTTI S. , FERRARA S. , VILLASANTE M.
Published: November 2004

We explore general properties of matter coupled supergravities with antisymmetric tensor fields embedded in linear multiplets. The four-dimensional supersymmetric version of the Green-Schwarz mechanism leads to the introduction of super Chern-Simons form multiplets whose general component expressions are derived. The use of superconformal techniques allows us to discuss several topics relevant to superstring effective actions and in particular to give simple forms for the string-loop corrections to the Kahler potential and the U(1) anomaly cancelling term present in certain superstring compactifications.
CONSTRUCTION OF INTERACTING STRING AND SUPERSTRING FIELD THEORY
Authors: JEVICKI ANTAL
Published: November 2004

The formulation of Witten’s open string and superstring field theory is reviewed. It is based on the operator method in which the basic ingredients of the theory are constructed in the string Hilbert space and the symmetries and on-shell properties of the theory are established.
MONOPOLE-CHARGE INSTABILITY
Authors: HORVÁTHY P.A. , O’RAIFEARTAIGH L. , RAWNSLEY J.H.
Published: November 2004

For monopoles with nonvanishing Higgs potential it is shown that with respect to “Brandt-Neri-Coleman type” variations (a) the stability problem reduces to that of a pure gauge theory on the 2-sphere (b) each topological sector admits one, and only one, stable monopole charge, and (c) each nonstable monopole admits 2∑2|q|−1 negative modes where the sum goes over all negative eigenvalues q of the non-Abelian charge Q. An explicit construction for (i) the unique stable charge (ii) the negative modes and (iii) the spectrum of the Hessian, on the 2-sphere, is then given. The relation to loops in the residual group is explained. The negative modes are tangent to suitable energy-reducing two-spheres. The general theory is illustrated for the little groups U (2), U (3), SU (3)/ℤ3 and O (5).
INTEGRALS OF MOTION IN SCALING 3-STATE POTTS MODEL FIELD THEORY
Authors: ZAMOLODCHIKOV A.B.
Published: November 2004

Some nontrivial integrals of motion for the scaling 3-state Potts model are constructed explicitly. These integrals of motion prove the corresponding scattering matrix to be factorizable and allow one to “derive” this S-matrix under a few natural assumptions.
TRIPLE REGGE ANALYSIS AND $K\bar{K}$ OFF-SHELL INTERACTIONS FROM $p\mathop{\to} \limits^{K^-}\Lambda$ AT 110 GeV/c
Authors: BANERJEE S. , GANGULI S.N. , GURTU A. , MALHOTRA P.K. , SUDHAKAR K. , GOLDSCHMIDT-CLERMONT Y. , ROSS R.T. , SQUARCIA S. , HAUPT T. , KRASNY M.W. , GIRTLER P. , KUHN D. , KAUL G.L. , ANAND DEV , BABA P.V.K.S. , BARNHAM K.W.J. , EASON R.M. , MANDL F. , MARKYTAN M. , BARDADIN-OTWINOWSKA M. , SZCZEKOWSKI M.
Published: November 2004

A study of Λ production has been made in the proton fragmentation region from K−p interactions at 110 GeV/c. From a simultaneous fit to the missing mass distributions and the inclusive Λ production cross section with P tab ≥10 GeV/c , the intercept of the strange meson trajectory is determined to be ≃−0.15. The contribution of the Pomeron is found to be dominant at the [Formula: see text] vertex in 110 GeV/c K−p interactions. The charged multiplicities and moments from off-shell [Formula: see text] interactions have been studied as a function of M2, the c.m. energy square of the virtual [Formula: see text] system.
CORRELATION FUNCTIONS AND ZERO MODES ON HIGHER GENUS RIEMANN SURFACES
Authors: BONINI M. , IENGO R.
Published: November 2004

We describe systematically the propagators and the zero modes of the various two dimensional fields which appear in the construction of the scattering amplitudes in the string theory, within the framework of the covariant formulation, and we discuss also their modular transformation properties.
KAON FORM FACTOR FOR SMALL Q2
Authors: BEILIN V.A. , NESTERENKO V.A. , RADYUSHKIN A.V.
Published: November 2004

We calculate the electromagnetic charge radii of K± and K0 mesons using the QCD sum rule approach. The results agree with existing experimental data. The relation to the vector meson dominance model is briefly discussed.
THE MASSLESS BOUND STATE FORMALISM IN TWO-PARTICLE RELATIVISTIC QUANTUM MECHANICS
Authors: SAZDJIAN H.
Published: November 2004

We develop, in the framework of two-particle relativistic quantum mechanics, the formalism needed to describe massless bound state systems and their internal dynamics. It turns out that the dynamics here is two-dimensional, besides the contribution of the spin degrees of freedom, provided by the two space-like transverse components of the relative coordinate four-vector, decomposed in an appropriate light cone basis. This is in contrast with the massive bound state case, where the dynamics is three-dimensional. We also construct the scalar product of the theory. We apply this formalism to several types of composite systems, involving spin-0 bosons and/or spin-1/2 fermions, which produce massless bound states.
CONFORMALLY COVARIANT APPROACH TO THE INTEGRABILITY OF SDYM: LINEAR SYSTEM, β-PLANES, INFINITESIMAL BÄCKLUND TRANSFORMATIONS AND INFINITE-DIMENSIONAL ALGEBRAS
Authors: AVAN J. , de VEGA H.J.
Published: November 2004

The self-dual Yang-Mills theory is investigated with the help of a new conformally covariant linear system, where the spectral parameter is a projective twistor [Formula: see text]. We derive from this linear system conformally covariant families of β-planes, on which the potential Aµ(x) is a pure gauge. They are parametrized by a dual projective twistor [Formula: see text], orthogonal to the spectral twistor Λ. Conformally covariant infinitesimal Bäcklund transformations (B.T.) are constructed for the gauge group [Formula: see text] or [Formula: see text], and for SU (N). They are characterized by (1) a Lie-algebra index 1≤a≤ dim g; (2) the spectral twistor Λ; (3) a second twistor index 1≤α≤4, (independent of Λ); (4) an arbitrary (analytic) function of the two independent solutions of the free linear system (Aµ=0). The algebra of these infinitesimal B.T. is computed. It turns to close up to a field-dependent gauge transformation, which vanishes for equal twistor indices. The reduction of the number of components of Λ to a single projective parameter [Formula: see text] leads to a loop algebra. In general it yields an infinite-dimensional algebra with five indices.
PROBABILITY FUNCTIONS AND SYSTEMATICS OF LARGE SCALE CLUSTERING
Authors: HOUJUN MO
Published: November 2004

The two-point correlation functions are calculated from different probability functions for a given volume. It is shown that two of the five probability functions usually used can marginally produce the systematics of the large scale clustering observed for Abell clusters.
Λ-Σ COUPLING EFFECT ON NONMESONIC DECAY OF HYPERNUCLEI
Authors: BANDŌ H. , SHONO Y. , TAKAKI H.
Published: November 2004

In addition to the one-pion-exchange ΛN→NN process with a weak ΛNπ and a strong NNπ vertex, the ΛN→ΣN→NN process is considered, where the ΛN-ΣN coupling is induced mainly by π exchange. For the weak ΛNπ and ΣNπ vertices, the empirical values are used along with the SU3 symmetry and the ΔI=1/2 rule. The closure approximation is employed for the intermediate ΣN state. The form factors and the initial and final correlations are taken into account. Calculations are done for the [Formula: see text] hypernucleus.
PARTITION TEMPERATURE AND PION CONDENSATION IN HIGH ENERGY COLLISIONS
Authors: LO S.Y. , SCHREIBER A.
Published: November 2004

We develop a description of single pion momentum distributions incorporating Bose-Einstein statistics and compare it to data at ISR and collider energies. Events of fixed multiplicity are described by a temperature which varies as a function of multiplicity. For high temperatures the model gives similar results to the recently introduced partition temperature model. while for low temperatures the possibility of pion condensation is explored.
CONFORMALLY INVARIANT FIELD THEORY IN TWO DIMENSIONS AND STRINGS IN CURVED SPACETIME
Authors: JAIN SANJAY
Published: November 2004

The formalism of conformally invariant field theory on a 2-dimensional real manifold with an intrinsic metric is developed in the functional integral framework. This formalism is used to study the relationships between reparametrization, Weyl, conformal and BRST invariances for strings in generic backgrounds. Conformal invariance of string amplitudes in the presence of backgrounds is formulated in terms of the Virasoro conditions, i.e., that physical vertex operators generate (1,1) representations of the Virasoro algebra, or, equivalently, the condition Q|Ψ〉=0 on physical states |Ψ〉, where Q is the BRST charge. The consequences of these conditions are investigated in the case of specific backgrounds. Strings in group manifolds are discussed exactly. For a generic slowly varying spacetime metric and dilaton field, a perturbatively renormalized vertex operator solution to the Virasoro conditions is constructed. It is shown that the existence of a solution to the Virasoro conditions or the equation Q|Ψ〉=0 requires the spacetime metric to satisfy Einstein’s equations. These conditions therefore constitute equations of motion for both the spectrum and backgrounds of string theory.
GEOMETRODYNAMIC STEERING PRINCIPLE REVEALS THE DETERMINERS OF INERTIA
Authors: WHEELER JOHN ARCHIBALD
Published: November 2004

What shall we need to grasp the essence of quantum gravity? One requirement, at least, is essential: to understand the steering principle of classical geometrodynamics. We outline here the physical content of that steering principle—heart of the so-called initial value problem—in its J.W. York, Jr. formulation. The central idea epitomizes itself in a single simple sentence: Mass-energy there determines inertia here. We spell out this steering principle both in its precise form and in its poor man’s version.

At both levels of analysis considerations of physics and mathematics alike require that the effective mass-energy of gravity waves must make itself felt on the space-time geometry—and therefore on the gyro-defined local inertial frame of reference—on the same level as matter itself. Additional to the (mass)/(distance) Newtonian potential so familiar as measure of the effect of a nearby mass on the local frame is the Thirring and Lense gravitomagnetic potential, proportional to (angular momentum)×(distance vector)/(distance)3. The recent proposal of Ciufolini for a dual laser-ranged LAGEOS satellite to detect the thus-predicted gravitomagnetism of the earth is briefly described.
DIFFEOMORPHICALLY NONEQUIVALENT CLASSES OF SOLUTIONS IN GAUGE THEORIES ON GROUP MANIFOLDS
Authors: ABECASIS C. , FOUSSATS A. , ZANDRON O.
Published: November 2004

For the Poincare group manifold we prove that there are solutions for the pseudo-connection one-forms (Yang-Mills potentials) which are not diffeomorphically equivalent to those initially proposed by Ne’eman and Regge in their gauge theory of gravity and supergravity on a (super) group manifold. This is done by imposing the factorization conditions to the geometrical formulation of supersymmetric gauge theory.
VERTEX FUNCTIONS IN THE PATH INTEGRAL FORMALISM OF OPEN STRING THEORIES
Authors: TANII YOSHIAKI , WATABIKI YOSHIYUKI
Published: November 2004

We study a systematic method to obtain the general vertex functions (of Neveu-Schwarz sector), which are used in the covariant path integral approach to the open bosonic and superstring theories. For the superstring the superspace formulation in the Wess-Zumino gauge is used to construct the vertices at the boundaries of world sheets. For both theories the vertex functions are explicitly obtained for the first four mass levels and coincide with those in the operator formalism.
STRANGE MATTER, DETONATIONS AND SUPERNOVAE
Authors: BENVENUTO O. G. , HORVATH J. E. , VUCETICH H.
Published: November 2004

We present a possible scenario driven by QCD deconfinement in a high density nuclear matter medium. Some expected consequences for type II supernovae explosions are also given, particularly, the output energy that might be enough to account for the observed events.
ON THE ZERO COSMOLOGICAL CONSTANT SUGRA AND THE ASYMMETRIC ORBIFOLD
Authors: CHANG NGEE-PONG , LI DA-XI , PÉREZ MERCADER J.
Published: November 2004

In this paper, we give a brief review of the orbifold compactification of Superstrings and describe how the spectrum of zero-modes determines the structure of the 'low'-energy compactified theory. We show how the asymmetric orbifold can lead to a 'low'-energy N = 1 SUGRA theory that continues to have a zero cosmological constant even after supersymmetry is broken. We discuss the implications the asymmetric orbifold can have for a new scenario of the hierarchy of compactification scales.
COSET SPACE DIMENSIONAL REDUCTION AND GAUGE FIXING OVER THE SUPERCIRCLE
Authors: JARVIS P. D.
Published: November 2004

The constraints of CSDR are solved for vector gauge fields over a coset space IOSp (1/2, R)/ OSp (1/2, R) including supertranslations (extended BRST transformations) and ordinary translations (rotations on the circle). The gauge-fixing action incorporates standard ghost and multiplier fields (and their modes) but is nonpolynomial in an additional scalar field ϕ and its modes. There is a new "ϕ-BRST" invariance with respect to ϕ dependent gauge transformations, a bosonic counterpart of the usual "ghost-BRST" invariance. In the Abelian case, ϕ can be integrated out, leading to a formalism equivalent to ordinary covariant gauge-fixing.