bluuebunny/crossref_metadata_2025 huggingface dataset:
HIGHER DIMENSIONAL COSMOLOGY WITH STRING VACUUM ENERGY
Authors: NISHIMURA H. , TABUSE M.
Published: November 2004

We consider higher dimensional cosmology based on the closed bosonic string theory with the one-loop vacuum energy. It is concluded that the winding-effect of strings around tori has a chance to prevent the extra space from expanding, even though the curvature of torus is zero.
BETA-GAMMA DECAY OF 115In
Authors: PACHECO A. F. , STROTTMAN D.
Published: November 2004

We have computed the beta-gamma decay width of 115 In . This compound transition, through both the first and second excited levels of 115 Sn , has a branching ratio of about 10−6 with respect to the dominant β− decay, and it causes an additional background were 115 In used as a solar neutrino detector.
ENTROPY PRODUCTION IN HIGH DIMENSIONAL ANISOTROPIC UNIVERSES
Authors: CHEN L. F. , ZHOU M. Y.
Published: November 2004

A new mechanism for entropy production in anisotropic universes is proposed in this paper. Using the mechanism to a high dimensional anisotropic universe, we obtain an expression for the ratio of final entropy to initial one. These results are useful for investigation of universe evolution in Kaluza–Klein cosmologies.
REPARAMETRISATION — INVARIANT CLOSED STRING FIELD THEORY: FOLIATION STRUCTURE AND PHYSICAL SPECTRUM
Authors: NOURI-MOGHADAM M. , SMITH C. R. R. , TAYLOR J. G.
Published: November 2004

The foliation structure and physical spectrum of a reparametrisation-invariant field theory of closed strings are analyzed to show (a) independence of the action of the foliation (b) that the spectrum is that of the usual light cone gauge formulation.
ELECTRODYNAMICS OF THE DIRAC FIELD
Authors: PAPINI G.
Published: November 2004

Classical electrodynamical models are constructed in which both vector bosons and fermions are generated by massless, topologically singular scalar fields. The Dirac equation supplies Maxwell equations and the constraint necessary to obtain from them charged fermions with stringlike structure.
MULTIPLICITY DISTRIBUTIONS FOR $\rm{\bar P} P$ COLLISIONS
Authors: HUANG DING WEI , YEN EDWARD
Published: November 2004

The multiplicity distribution for [Formula: see text] collisions at [Formula: see text] is written as the sum of Poisson distributions at different impact parameter b. An energy independent relation between the variable [Formula: see text] and b is suggested. With this relation, the multiplicity distributions at [Formula: see text] and 900 GeV are described well. The distribution at [Formula: see text] is predicted.
$D^0 - \bar D^0 $ MIXING IN THE NEW LEFT-RIGHT MODEL
Authors: MA ERNEST
Published: November 2004

In the newly proposed supersymmetric left-right model with E6 particle content, [Formula: see text] mixing can occur through WR couplings of the c and u quarks to the exotic h quarks, and may become observable at a level well above that of the standard model.
ON THE N-DEPENDENCE OF TOTAL CROSS-SECTION OF SCATTERING ON CRYSTAL
Authors: KOLOKOLOV I. V.
Published: November 2004

It is shown that the total cross-section of coherent beam elastic scattering on crystal is proportional to [Formula: see text], where N is the number of scatterers.
SEARCH FOR CP VIOLATION VIA $e^ + e^ - \to B^0 \bar B^0 \gamma $
Authors: STONE SHELDON
Published: November 2004

I propose an experiment to measure CP violation in B0 meson decays by collecting B mesons via [Formula: see text] and looking for a difference between final states with a positive lepton and a CP eigenstate and those with a negative lepton and a CP eigenstate. It is predicted that ~107 events would be sufficient.
DUALITY IN SUPERSPACE AND ANOMALY FREE SUPERGRAVITY: SOME REMARKS
Authors: D’AURIA R. , FRÉ P.
Published: November 2004

We show that the superspace formulation of anomaly free supergravity based on the 2-form B(2) and on the 6-form B(6) are asymmetrical. B(6) is the electric potential while B(2) is the magnetic one. As a consequence, the Bianchi-identity associated with the B(2) formulation is the inhomogeneous Maxwell equation which provides a full account of the dynamics. The Bianchi identity associated with B(6) is the homogeneous Maxwell equation: a mere identity which yields no information on the dynamics. It admits a universal “off-shell” solution.
ITERATIVE INVESTIGATION OF SU(2) LATTICE GAUGE THEORY
Authors: KERLER WERNER
Published: November 2004

A recently developed method of continuous iteration, which forms iterative roots of convolutions and incorporates Migdal-Kadanoff rescaling by a differential equation, is used to investigate SU(2) theory on the renormalized trajectory over the whole range from one asymptotic behavior to the other. For d=4, beta function and free energy are calculated.
NUMERICAL REEXAMINATION OF SU(5)-LIKE MODELS
Authors: GRECH DARIUSZ K.
Published: November 2004

Analytical and numerical reexamination of SU(5)-like grand unified models is presented. Although an unmodified version of SU(5) is considered, we show that numerical calculations allow some of the models still to be experimentally admissible. Values for sin2 θw, Mx and τp are corrected. It is especially shown that the above parameters depend on the mass spectrum of higher generations much more than Higgs-Yukawa couplings could affect them.
ON THE INFINITIES OF CLOSED SUPERSTRING AMPLITUDES
Authors: RESTUCCIA A. , TAYLOR J.G.
Published: November 2004

We present an analysis of possible infinities that may be present in uncompactified multi-loop heterotic and type II superstring amplitudes constructed, without use of the short-string limit, in the light-cone gauge, and with use of a closed [10]-SUSY field theory algebra. Various types of degenerations of the integrand are discussed on the string world-sheet. No infinities are found, modulo (for type II) a particular identity for Green’s functions.
ORBIFOLD COMPACTIFICATIONS OF D<10 DIMENSIONAL FERMIONIC HETEROTIC STRING
Authors: KITAZOE T. , NISHIMURA H. , TABUSE M.
Published: November 2004

Starting with D<10 dimensional fermionic heterotic string models and compactifying the remaining D−4 dimensions on Z3 orbifold, we study a scheme to combine the spin structure construction and the orbifold construction. It is shown that the scheme provides us with models which can easily accomodate a small number of chiral generations.
COMMENT ON THE NON-RENORMALIZATION THEOREM IN FOUR-DIMENSIONAL STRING THEORY AND VANISHING β-FUNCTION FOR NEWTON’S CONSTANT
Authors: CHEN C.C. , KIKUCHI Y.
Published: November 2004

Three-point one-loop amplitude for the graviton is considered in the string theory compactified on orbifolds with N=1 supersymmetry. We show that the amplitude leads to the vanishing correction to the Newton’s constant.
PROTON DECAY INCLUDING EXTRA Z0 BOSONS
Authors: LI TIE-ZHONG
Published: November 2004

There exists an apparent discrepancy between proton decay experiment and simplest SU(5) prediction. We suggest a scheme: if there exists an extra Z0 boson, then the experimental value of the proton decay may be calculated from GUT and the good results of SU(5) can be preserved. The increasing fermions will not be bizarre.
CANONICAL QUANTIZATION AND MASS SPECTRUM OF RELATIVISTIC PARTICLE ANALOGUE OF RELATIVISTIC STRING WITH RIGIDITY
Authors: PLYUSHCHAY M.S.
Published: November 2004

The generalized model of relativistic particle is studied. Its action contains the term for a free particle of mass m together with an additional term proportional to the curvature of its world trajectory. From the full set of Hamiltonian constraints, the mass shell condition is singled out and canonical quantization of the model is performed. The quantized system is shown to be equivalent to relativistic rotator with the mass spectrum coinciding with the spectrum of squared Majorana equation: [Formula: see text], where M is rotator’s mass, s is its spin and α−1 is a constant in additional term in action.
SOLAR NEUTRINO FLUX AND SUNSPOT DATA
Authors: RAYCHAUDHURI PROBHAS
Published: November 2004

It is shown that the sunspot data and the solar neutrino data anticorrelates except for the period of three years after the sunspot maximum. This suggests that the solar activity cycle is due to the pulsating character of the nuclear energy generation inside the core of the sun.
MONOPOLES ARE NOT AN INEVITABLE CONSEQUENCE OF THE GRAND UNIFICATION
Authors: KRASNIKOV N.V.
Published: November 2004

We give an example of the grand unified model without monopoles which arises in Kaluza-Klein compactification of a pure gauge field theory of the special kind.
QCD EFFECTS ON $B^0 -\bar{B}^0$ MIXINGS FOR VARIOUS VALUES OF THE TOP MASS
Authors: KAUFMAN WILLIAM A. , STEGER HERBERT , YAO YORK-PENG
Published: November 2004

We consider QCD effects on [Formula: see text] systems when [Formula: see text] and [Formula: see text], where [Formula: see text] and mw are the masses of the top quark and the charged W bosons, respectively. They are markedly different from naïve extrapolations of formulae valid for [Formula: see text]. We then apply our results to the ARGUS [Formula: see text] mixing and obtain a lower bound [Formula: see text].
TOPOLOGY COLLAPSE OF NONTRIVIAL U(1)-BUNDLE ON LATTICIZED SPHERE
Authors: KOIBUCHI HIROSHI , YAMADA MITSURU
Published: November 2004

Applying the Monte Carlo technique, we study the statistical mechanics of U(1) gauge model on two dimensional spherical lattice of the Mercator type. Special emphasis is put on the topology of the gauge-field configuration. At sufficiently low temperatures, we demonstrate the existence of many metastable states, each of which has a well-defined Chern number. At higher temperatures, we observe how they lose their topology and collapse.
ON COVARIANT GAUGE FIXING FOR THE SUPERPARTICLE AND SUPERSTRING
Authors: MAJUMDAR PARTHASARATHI
Published: November 2004

We show that a ‘naive’ Lorentz covariant gauge-fixing of the gauge symmetries of the Brink-Schwarz-Siegel superparticle leads to a ghost sector with a kinetic energy operator that is singular on the constraint surface. We argue that this degeneracy is of infinite degree, entailing an infinite number of ghost generations. We indicate how an identical conclusion must hold for the Green-Schwarz-Siegel superstring.
D=10 SUPERSPACE GEOMETRY AND HETEROTIC SUPERSTRING THEORY (I)
Authors: BELLUCCI S.
Published: November 2004

Using a Weyl transformation in superspace, we provide a noncanonical formulation of standard D=10, N=1 supergravity, including the gauge matter sector. This formulation turns out to be ideally suited for carrying out the renormalization of the Green-Schwarz σ-model describing the D=10 heterotic string propagating in a curved background space. By reducing the superspace results to the component level, we derive the supersymmetry transformation laws for the component fields of the theory.
MEASUREMENT OF SELF-COUPLINGS IN A LATTICE SCALAR ϕ4 THEORY WITH SPONTANEOUSLY BROKEN SYMMETRY
Authors: MUNEHISA TOMO , MUNEHISA YASUKO
Published: November 2004

Using Monte Carlo techniques on a 104 lattice, we measured the renormalized coupling of the three-point Green function g(3) R , the vacuum expectation value <ϕ R > and the renormalized mass m R of one-component scalar ϕ4 theory in the broken phase. We found that the value of g(3) R <ϕ R >/m R 2 is consistent with the perturbative calculation even when the renormalized coupling is large.
MOMENTS ANALYSIS OF THE EMC-EFFECT
Authors: GUPTA SOURENDU , MURTHY M. V. N.
Published: November 2004

We find that moments of structure functions can easily distinguish between rescaling and Fermi-smearing models of structure functions. Data seem to support the rescaling models, but more accurate experiments with more data at large x are required to fix on some model.
FIELD CORRECTIONS TO INDUCED STATISTICS
Authors: GOLDHABER ALFRED S. , MACKENZIE R. , WILCZEK FRANK
Published: November 2004

The contribution of explicit field terms appearing in the Lagrangian (Chern-Simons terms and θ-terms) to the calculation of particle statistics is analyzed. The Chern-Simons term halves the contribution of current-field coupling terms in 2 + 1 dimensions. The effect of the θ-term in 3 + 1 dimensions is contrasted. In both cases, observational differences between fundamental and induced charges arise. The factor 1/2 is necessary to reconcile Paranjape's result on the angular momentum (L = 1/4) of a vortex in minimal massive QED with the general spin-statistics connection. Issues related to the (non)screening of the statistical interaction, ultraviolet sensitivity of induced statistics, and duality in the quantized Hall effect are mentioned. It is shown in passing that quite harmless-looking field theories generically contain particles with exotic statistics.
A COMMENT ON DYNAMICAL COUPLING CONSTANTS AND THE ANTHROPIC PRINCIPLE
Authors: RUBAKOV V. A. , SHAPOSHNIKOV M. E.
Published: November 2004

On the basis of recent discussion of the effects due to topological changes, it is conjectured that the actual values of coupling constants of nature are most probably near the boundary of the anthropogenesis region in the space of all coupling constants.
ON THE QUANTIZATION OF THE CHIRAL SCHWINGER MODEL
Authors: TRINCHERO R. C.
Published: November 2004

We present a method for the quantization of the chiral Schwinger model. We consider the problem of constraints and we determine their structure at the quantum mechanical level. We obtain consistent quantum theories.
SUPERSYMMETRY WITH VECTOR-SPINOR GENERATORS
Authors: PILOT CHRISTOPHER , RAJPOOT SUBHASH
Published: November 2004

Supersymmetry with spin-3/2 generators is constructed and shown to give a closed algebra. A phenomenological Lagrangian is constructed which describes an interaction of spin-3/2 particle with itself.
A GAUGE MODEL DESCRIBING N RELATIVISTIC PARTICLES BOUND BY LINEAR FORCES
Authors: FILIPPOV A. T.
Published: November 2004

A relativistic model of N particles bound by linear forces is obtained by applying the gauging procedure to the linear canonical symmetries of a simple (rudimentary) nonrelativistic N-particle Lagrangian extended to relativistic phase space. The new (gauged) Lagrangian is formally Poincaré invariant, the Hamiltonian is a linear combination of firstclass constraints which are closed with respect to Poisson brackets and generate the localized canonical symmetries. The "gauge potentials" appear as the Lagrange multipliers of the constraints. Gauge fixing and quantization of the model are also briefly discussed.
QUANTIZATION OF THE HOPF COEFFICIENT IN EFFECTIVE GAUGE THEORIES OF DOPED MOTT INSULATORS
Authors: AITCHISON I. J. R. , MAVROMATOS N. E.
Published: November 2004

A quantization condition is given for the coefficient of the Hopf invariant which arises in effective (Abelian) gauge theories of doped Mott insulators formulated on S2 × S1 (as a result of a high temperature expansion). A value 1/2 for the spin of the relevant excitations is obtained among the allowed values. This may explain the origin of neutral fermions in paramagnetic insulators which are believed to play a major role in high temperature superconductivity. Other fractional spin excitations, however, are allowed as well, whose physical significance is not yet transparent.
COSMOLOGICAL IMPLICATIONS OF QUASAR-GALAXY ASSOCIATIONS
Authors: FANG L.Z. , CHU Y.Q. , ZHU X.F.
Published: November 2004

The redshift distribution of quasars associated with galaxies was analysed. One found that, for some samples of associated quasars, the distribution is periodic. Among all models to explain the existence of such associations, the multiply-connected topology model seems to be the best.
IMPROVED FORMULATION OF GNO FERMIONIZATION THEOREM
Authors: FRE’ P. , GLIOZZI F. , PIRAS A.
Published: November 2004

It is pointed out that in the Kac-Moody algebras fulfilling the fermionization criterion of Goddard, Nahm and Olive and having a non-minimal value of the central charge k, only a proper subset of the allowed unitary highest weight representations can actually be encoded in a free fermion theory. These truly fermionizable representations are selected by a very specific non-regular embedding of the fermionizable Kac-Moody algebra into the lowest level SO (N F ) Kac-Moody algebra, N F being both the number of fermions and the dimension of the GNO symmetric space. This embedding is a particular case of the embeddings considered by Bais and Bouwknegt and by Schellekens and Warner, for which the Virasoro central charge of the subgroup is equal to that of the group. Furthermore, these fermionizable representations span an orbit of the modular group always leading to a non trivial modular invariant partition function.
A TOPOLOGICAL HAWKING EFFECT
Authors: KANDRUP HENRY E. , MAZUR PAWEL O.
Published: November 2004

Consideration of particle creation on a topologically nontrivial instanton leads to the possibility of a “topological Hawking effect”, whereby virtual pairs are converted to real particles because of a “change in topology”. This effect, calculable in a coherent state representation, is illustrated here for a manifold with two boundaries and one handle. It is also argued that this effect could provide a natural explanation of the Hot Big Bang scenario whereby the Universe “tunnels into being”.
BREIT-FERMI INTERACTIONS AND FINE-HYPERFINE SPLITTING IN HEAVY QUARKONIA
Authors: GHOSH S. , MUKHERJEE S.
Published: November 2004

The adequacy of using the Breit-Fermi type of interactions for describing the fine hyperfine splittings of heavy quarkonia has been examined critically. A potential model which just about accommodates the trend of the recent data on 1P1 states has been studied. The possibility of including the spin-dependent contributions of a pseudoscalar exchange potential is also considered. It is shown that the choice of the Breit-Fermi form for the spin-dependent interactions severely constrains the generally accepted non-relativistic potential and do not allow enough freedom to fit the recent data on 1P1 levels.
A GEOMETRICAL INTERPRETATION OF SPIN
Authors: BATENBURG PETER , SCHAKEL ADRIAAN M.J.
Published: November 2004

In this paper, it is shown that Polyakov’s spin factor is the holonomy factor of a particle moving on a sphere interacting with a non-Abelian monopole at the centre of this sphere. This is achieved by invoking the concept of Berry’s phase.
NON-RENORMALIZABLE TERMS FROM A SELECTION RULE IN THE THREE GENERATION MODEL
Authors: CORDES STEFAN F. , KIKUCHI Y.
Published: November 2004

A class of non-renormalizable terms is studied in terms of the selection rule in the three generation model.
ASYMPTOTICAL FINITENESS AND ASYMPTOTICAL SUPERSYMMETRY IN GRAND UNIFICATION THEORIES
Authors: ODINTSOV S.D. , SHAPIRO I.L.
Published: November 2004

Grand Unification Theories with field content admitting the finiteness of all coupling constants are considered. The asymptotical behavior of all effective coupling constants is investigated. It is shown that GUT’s under consideration are asymptotically finite in the ultraviolet limit and are asymptotically finite and asymptotically supersymmetric in infrared limit.
SEARCHING FOR NEW Z′-BOSONS AND LEPTOQUARKS AT FUTURE e+e−-COLLIDERS
Authors: ALIEV T.M. , DOBROLIUBOV M.I.
Published: November 2004

A number of superstring theories predict the existence of an extra new Z′-boson and leptoquarks which may possess massess about 1–10 TeV. We investigate in detail possible manifestations of these particles in polarized e+e− beams on future colliders LEP II and CLIC. We calculate cross-sections and various asymmetries of the processes e+e−→µ+µ−, [Formula: see text], ūu taking into account contributions of the Z′-boson and leptoquarks. It is shown that the measurement of the total cross-section σ(e+e−→µ+µ−) is the most sensitive parameter for the existence of Z′-bosons, and the forward-backward asymmetry AFB is that for the existence of leptoquarks.
DARBOUX TRANSFORMATION METHOD FOR GIVING SOLITON SOLUTIONS OF THE DERIVATIVE NONLINEAR SCHRÖDINGER EQUATION
Authors: CHEN ZONG-YUN , HUANG NIAN-NING
Published: November 2004

The so-called Darboux transformation method is presented for giving soliton solutions of the derivative nonlinear Schrödinger equation. With the help of the reduction transformation invariance, a possible form of the Darboux transformation is found simply. This method is more elementary and more simple as there is no need to discuss analyticities of the Jost solutions and time dependence of the scattering dates.
DIMENSION GROUPS, EMBEDDINGS AND PRESENTATIONS OF AF ALGEBRAS ASSOCIATED TO SOLVABLE LATTICE MODELS
Authors: EVANS DAVID E. , GOULD JEREMY D.
Published: November 2004

If Γ is a graph, with distinguished vertex *, let A(Γ) denote the non-commutative path algebra on the space [Formula: see text] of semi-infinite paths in Γ beginning at *. Embeddings A(Γ1)→A(Γ2) of non-commutative AF algebras associated with graphs Γ1 and Γ2 are discussed from a dimension group point of view. For certain infinite T-shaped graphs, we have K0(A(Γ))≃ ℤ[t], with positive cone identified with {0}∪{P∈ℤ(t): P(λ)>0, λ∈(0,γ]}, where γ=γ(Γ)= ||Γ||−2<1/4. Hence for certain graphs there exists a unital homomorphism A(Γ1)→A(Γ2) if ||Γ1||=||Γ2||. For certain finite T-shaped graphs K0(A(Γ))≃ℤ[t]/ where  denotes the ideal generated by a polynomial Q=Q(Γ) which is essentially the characteristic polynomial of the graph Γ, and positive cone identified with {0}∪{f+: f(γ)>0} where γ=γ(Γ)=||Γ||−2. Hence there exists a unital homomorphism A(Γ1)→A(Γ2) if ||Γ1||=||Γ2||, and Q(Γ1) divides Q(Γ2). The structure of K0(A(Γ)) as an ordered ring is related to the fusion rules of rational conformal field theory. Moreover, for these T-shaped graphs there is an algebraic presentation which further illuminates the above embeddings. This presentation involves a new projection and a new relation in addition to those of Temperley-Lieb, and gives a rigidity above index four.
DUALITY FOR ANYONS
Authors: HANSSON T.H. , KARLHEDE A.
Published: November 2004

We study the Nielsen-Olesen vortices in the three dimensional noncompact Abelian Higgs model with a Chern-Simons term. The vortices are fractionally charged anyons (i.e., particles with fractional spin and statistics). In a certain limit we can express the theory in terms of these topological excitations by performing a duality transformation on the lattice. The result is a topologically conserved current describing the vortices, minimally coupled to a dynamical gauge field with a Chern-Simons term. Spin, statistics and size of the excitations are all preserved under this transformation.
QCD TEST OF THE TRIPLE VERTEX IN DEEP INELASTIC SCATTERING FOR DIFFERENT R=τL/σT PARAMETRIZATIONS
Authors: KOTIKOV A.V.
Published: November 2004

Fit of gluon self-coupling suggested by E. Reya1 is made in Quantum Chromodynamics for three (n=3, 4, 5) moments of the gluon distribution in the region of Q2~ 50–1000 GeV 2. The result depends strongly on the parametrization of the ratio R(x, Q2) =σL/σT, where σL and σT are cross sections of the longitudinal and transverse photon on a nucleon. We show the necessity of the logarithmic rather than power violation of the Callan-Gross correlation.2
A GAUSSIAN APPROACH TO SINE GORDON THEORY AT FINITE TEMPERATURE
Authors: ROY PINAKI , ROYCHOUDHURY RAJKUMAR , VARSHNI Y.P.
Published: November 2004

We evaluate the gaussian effective potential (GEP) for the Sine Gordon theory at finite temperature. Using the GEP we find a critical temperature (Tc) such that for all T≥Tc, soliton solutions in this model cease to exist. The zero temperature situation has also been analysed and it has been shown that for λ≥λc, solitons do not exist.
TREE DIAGRAMS IN WITTEN’S SUPERSTRING FIELD THEORY
Authors: SIOPSIS GEORGE
Published: November 2004

It is shown that the contact term discovered by Wendt is sufficient to ensure finiteness of all tree-level scattering amplitudes in Witten’s field theory of open superstrings. Its inclusion in the action also leads to a gauge-invariant theory. Thus, no additional higher-order counterterms in the action are needed.
FERMIONIC STRING MODELS AND ZN ORBIFOLDS
Authors: DUNBAR DAVID C.
Published: November 2004

It is shown that ZN orbifold models may, in special case be realised by a set world sheet fermions which have boundary conditions which are non-diagonal.
SKYRMIONS REVISITED
Authors: RHO MANNQUE
Published: November 2004

Some highlights in recent developments of the skyrmion model for baryons are reviewed, with an emphasis on hidden gauge symmetry and vector dominance, features associated with the topological structure, strangeness in the hyperons and in the proton and a hypersphere approach to dense nuclear matter.
REDUCTION OF SPINORS IN A NONCOMMUTATIVE GEOMETRY
Authors: MADORE J.
Published: November 2004

The classical theory of fermions is developed within the context of a noncommutative geometry. As an example the mass and charge spectra implied by the simplest generalization of the Maxwell-Dirac Lagrangian are calculated.
HIGHER-SPIN SYMMETRY IN ONE AND TWO DIMENSIONS (II)
Authors: FRADKIN E.S. , LINETSKY V. Ya.
Published: November 2004

Constructed are conformal higher spin superalgebras in one and two dimensions, which contain the Virasoro algebra as a subalgebra. The general structure of these superalgebras is investigated.
DIMENSIONAL REDUCTION AND THE LANCZOS TENSOR
Authors: ROBERTS M.D.
Published: November 2004

The Lanczos tensor Hαβγ is a potential for the Weyl tensor. Given the symmetries of these tensors it would be expected that the identification Hαβ5=Fαβ would give a reduction of the five dimensional vacuum field equations into equations related to the Einstein Maxwell equation, it is shown that this does not happen; furthermore it is shown that there is no dimensional reduction scheme involving the Lanczos tensor which agrees with the one devised by Kaluza and Klein in the weak field limit. The covariant derivative of the Weyl tensor can be expressed as a type of non-linear wave equation in the Lanczos tensor, the literature contains two incorrect expressions for this equation, here the correct expression is given for the first time. The expression for the Lanczos tensor in the case of weak fields is generalized. Some remarks are made on other approaches to include electro-magnetic theory into the theory of the Lanczos tensor.
THE CHOU-YANG MODEL AND ≡−p → ≡−p AT HIGH ENERGIES
Authors: KAMRAN MUJAHID , QURESHI I. B.
Published: November 2004

The Chou-Yang model is applied to the ≡−p elastic data from the SPS hyperon beam experiments under the assumption that hyperons have approximately equal form factors. Three different expressions for the proton electric form factor are used. All cases yield similar results in good agreement with experiment. The model predicts a dip in dσ/dt around −t ≃ 1 (GeV/c) 2 at present energies.
Is The Left-Right Higgs Sector Observable?
Authors: GUNION J. , MENDEZ A. , OLNESS F.
Published: November 2004

We examine the allowed mass range of the charged Higgs field H+ in a minimal left-right symmetric model. We find that the mass of this Higgs is nearly degenerate with the mass of the flavor-changing neutral Higgs, and this implies MH+≳5~10 TeV. We examine a number of solutions, but fail to evade this restriction. If this constraint can not be avoided, the H+ (and very likely all other left-right extended Higgs particles) would be virtually undetectable at all experimental facilities, including the SSC.
SUBSTRUCTURE AND HORIZONTAL SYMMETRIES AT HADRON COLLIDERS
Authors: Zeppenfeld Dieter
Published: November 2004

Four topics related to horizontal symmetries and composite models are discussed: a model of horizontal interactions avoiding FCNC constraints, the production of scalar leptoquarks, production and decay of excited quarks, and the sensitivity of pp colliders for measuring the ZWW vertex in ZW production.
FOUR PREON COMPOSITE QUARKS AND LEPTONS
Authors: RAJPOOT S. , SAMUEL MARK A.
Published: November 2004

A model is presented in which quarks and leptons are composites of three spin-½ preons and a scalar preon. The model is an extension of the rishon model and consists of two spin-½ preons T, V and a scalar preon S as the fundamental building blocks of matter. Assuming distinguishability of states due to the order assigned to the preons in forming the quark and lepton states, the concepts of flavour, colour and generation number acquire meaning only at the level of compositeness. The model predicts four generations of conventional quarks and leptons.
A STUDY OF ρ→ππ DECAY IN A GLOBAL COLOR MODEL FOR QCD
Authors: PRASCHIFKA J. , ROBERTS C.D. , CAHILL R.T.
Published: November 2004

We show how a meson effective action, in which all of the meson parameters are finite, arises from a “global color symmetry” model involving a nonlocal current-current (four-quark) interaction. As an application of this general approach we present a covariant analysis of the ρ-π system and thus obtain estimates for the ρ meson mass and the coupling constant gρππ.
NONPERTURBATIVE QCD, THE CONSTITUENT QUARK MODEL AND CONFINEMENT
Authors: MCKELLAR B.H.J. , SCADRON M.D. , WARNER R.C.
Published: November 2004

There are currently two major QCD-inspired quark models for hadrons. Nonrelativistic potential models and ultrarelativistic bag models have both had their successes. In this paper we present the case for an alternative quark picture, emphasizing the nonperturbative dynamical breaking of chiral symmetry in QCD. The relativistic constituent quark model which emerges recovers the main results of the other approaches, and also holds better prospects for the calculation of relativistic phenomena, and for the eventual understanding of the interrelations between chiral-symmetry breaking, hadron structure and confinement.
ONE-LOOP AMPLITUDES IN THE HETEROTIC STRING
Authors: JETZER P. , LACKI J. , MIZRACHI L.
Published: November 2004

We calculate the one-loop amplitudes for the emission of four massless particles in the heterotic string model. In particular, we consider the amplitudes involving four gravitons and gauge bosons supermultiplets as well as those for the mixed processes. We also discuss their modular invariance and finiteness.
A COSMOLOGICALLY ACCEPTABLE HARMLESS AXION IN A SUPERSTRING-INSPIRED MODEL
Authors: GABBIANI F.
Published: November 2004

We present a superstring-inspired model with an intermediate mass scale, incorporating a cosmologically acceptable harmless axion. The proposed U (1)PQ global symmetry forbids also some dangerous couplings in the E6-invariant superpotential which would lead to fast proton decay and unwanted nonrenormalizable terms.
EXTENDED BRS AND ANTI-BRS SYMMETRIES IN N=2 HARMONIC SUPERSPACE
Authors: LHALLABI T. , SAIDI E.H.
Published: November 2004

The full set of extended BRS and anti-BRS symmetries are derived for components of super-connection and gauge superfield using the N=2 harmonic superspace. The quantization of N=2 supersymmetric theory is developed and the proof of its gauge invariance is presented.
STUDY OF THE BRS CHARGE IN THE POLYAKOV STRING BY THE KUGO-OJIMA METHOD
Authors: ABAD J. , RODRIGUEZ-TRÍAS R.
Published: November 2004

Using the method of Kugo and Ojima we obtain the Becchi-Rouet-Stora charge in the string theory proposed by Polyakov. When a conformal improved energy-momentum tensor is used, we obtain the same BRS charge that emerges from other methods.
UNIFICATION OF YANG-MILLS THEORY AND SUPERSTRINGS
Authors: CHAPLINE GEORGE F.
Published: November 2004

A scheme is suggested for constructing new types of superstrings with critical dimensions D=10 and D=26 by introducing Yang-Mills potentials as auxiliary fields. The Yang-Mills gauge group is fixed by the critical dimension and the requirement that it must be spontaneously broken in order that the conformal anomaly cancel. For critical dimension D=26 a superstring may exist with an unbroken SU(3)×SU(2)×U(1) gauge invariance. This superstring has N=2 supersymmetry and is constrained to move on a nontrivial 24-dimensional complex manifold. Both the first quantized and second quantized versions of these string theories give promise of an interesting mathematical interpretation.
INCLUSIVE REACTIONS WITH THREE POLARIZED PARTICLES
Authors: GOLDSTEIN GARY R. , DHARMARATNA W.G.D. , MORAVCSIK MICHAEL J. , RINGLAND GORDON A.
Published: November 2004

In the reaction p+p→Λ+X with up to all three known particles polarized (which will be studied in Fermilab’s upcoming polarization facility) the relationship of the various polarization observables to the 20 three-in-three-out amplitudes is simply given by two 4-by-4 and 12 2-by-2 submatrices. The QCD predictions are said to be the firmest in the large momentum transfer region. There, in the lowest order perturbative calculations only two amplitudes are nonzero, thus yielding only six nonzero polarization quantities with four relations among them. For smaller momentum transfers, Regge model predictions for double correlation observables may be tested even though such models have failed to predict the large single Λ polarization which has been the subject of so much speculation in recent years. The three models which attempt to explain this large polarization can also be tested in these reactions with up to three polarized particles since they should yield small asymmetries for the incident particles. All in all, such polarization experiments will significantly strengthen the testing of the various proposed theoretical models.
EFFECTIVE ACTION IN MULTI-DIMENSIONAL SUPERGRAVITIES AND INDUCED EINSTEIN GRAVITY
Authors: BUCHBINDER I.L. , ODINTSOV S.D.
Published: November 2004

In the present paper a general expression of quantum effective action for arbitrary d-dimensional supergravity on the background Rn×Td−n′ where Rn is n-dimensional curved space-time, Td is d-dimensional torus, is obtained as an expansion on the curvature and its derivatives. The mechanism of inducing Einstein gravity with zero Λ term is proposed. It is shown that the 4-dimensional gravity with the true sign of the Newton constant is induced from d=5 supergravity when antiperiodic boundary conditions are chosen for all fields of supermultiplet. The one-loop effective action is obtained for d=4, 5, 7, 10 supergravities with the accuracy of linear curvature terms.

The one-loop Vilcovisky-De Witt effective action is also obtained for d=5 SG’s with the accuracy of linear curvature terms.
HADRON PRODUCTION IN HIGH ENERGY LEPTON-NUCLEON AND LEPTON-NUCLEUS COLLISIONS
Authors: SCHMITZ NORBERT
Published: November 2004

Recent experimental results on the production of hadrons in collisions of muons, neutrinos and antineutrinos with nucleons and nuclei at high energies are reviewed and discussed in the framework of the quark-parton model. Data are presented on the following topics: Multiplicities, fragmentation functions, transverse momenta and jet properties, azimuthal asymmetry, distribution of quantum numbers, production of strange and charmed particles, test of PCAC and shadowing, single meson production, and Bose-Einstein correlations.
COUPLED-ISOTRIPLETS INTERPRETATION OF THE ${}^9_\Sigma{\rm Be}$ HYPERNUCLEAR STATE
Authors: IKEDA K. , YAMADA T.
Published: November 2004

The [Formula: see text] hypernuclear state at EΣ≃10 MeV is interpreted as a superposition of the coupled states between the nuclear isotriplet (8 Li , 8 Be , 8 B ) and the isotriplet of Σ particle.
EFFECTS OF COMPOSITENESS IN TOP DECAY
Authors: WEISKOP SHLOMO
Published: November 2004

We present predictions for single quark decay of toponium in the presence of general contact interactions attributed to third-family compositeness.
ON THE PATH INTEGRAL QUANTIZATION OF CHIRAL BOSONS
Authors: SCHAPOSNIK F. A. , SOLOMIN J. E.
Published: November 2004

We show that, in the covariant Lagrangian formalism, a proper treatment of the gauge degree of freedom in a model of chiral bosons proposed by Siegel uncovers the presence of a Jacobian (a "Wess-Zumino action"): the group of gauge transformations gets quantized and the anomaly is absorbed.
EFFECTS OF MULTIQUARK BAGS IN THE QUARK POTENTIAL MODEL: APPLICATIONS TO NUCLEON-NUCLEON SCATTERING
Authors: KALASHNIKOVA YU. S. , NARODETSKII I. M.
Published: November 2004

The effects of the explicit treatment of multiquark confined states in the quark potential model are studied for the two-nucleon system. The confined six-quark component in the nucleon-nucleon wave function is shown to generate a new mechanism for the short-range nucleon-nucleon interaction which qualitatively reproduces both the repulsion and medium range attraction properties of the nuclear force. A quantitative effect of this mechanism is studied for a model with harmonic oscillator confinement. It is found that for an appropriate choice of parameters the NN force generated by an admixture of multiquark confined states can bind the six-quark system in the shallow deuteron-like bound state and qualitatively reproduces the low-energy phase-shift behavior. Our results may also be considered as the first example of dynamical calculations of nucleon-nucleon scattering in the Quark Compound Bag method using the explicit form of the six quark Hamiltonian.
ASYMPTOTIC COMPLETENESS AND THE THREE-DIMENSIONAL GAUGE THEORY HAVING THE CHERN-SIMON TERM
Authors: NAKANISHI N.
Published: November 2004

The three-dimensional Abelian gauge theory having the Chern-Simon term is studied. When matter current is absent, the gauge field in covariant gauge is explicitly expressed in terms of asymptotic fields. It is shown that the mechanism of mass generation can be understood as a kind of the Higgs mechanism.
THE CURVATURE OF LINE BUNDLE OVER DIFF S1/S1 AND SUPERDIFF S1/S1
Authors: PASTI P. , TONIN M. , WU K.
Published: November 2004

The method, used by Mickelsson to calculate the curvature of ghost vacuum line bundle over diff S1/S1 in terms of Grassmannian, is proved to be available in computing the curvature of string (bosonic field) vacuum line bundle. At the same time, the curvature of every kind of vacuum line bundle in string or superstring are reobtained by means of this method.
REVIEW OF DOUBLE BETA DECAY EXPERIMENTS
Authors: CALDWELL DAVID O.
Published: November 2004

The type of double beta decay (two-neutrino) which must occur via a second order weak interaction has finally been observed in the laboratory, and the result agrees with previous geochemical determinations. Calculations can be made to agree with these experiments by adding a particle-particle force to decrease the rate, but the additional force may not have a large effect on predictions of no-neutrino double beta decay. The latter, which requires lepton-number violation and one other element of new physics beyond the standard model (such as neutrino mass) could occur in at least two forms. One of these, Majoron-induced decay, has definitely not been observed so far, contrary to an earlier experimental result. The other form of neutrinoless decay is also not yet observed, the lifetime limit being about 1024 years. This limit can be used to set constraints on effective Majorana neutrino mass (~2eV), heavy Majorana neutrino mass, right-handed currents, and supersymmetric particles in theories with R parity violation.
THE OPERATOR STRUCTURE OF LAGRANGIAN FIELD THEORY
Authors: YAMAGISHI HIDENAGA
Published: November 2004

Lagrangian field theory is reformulated as an integrable system for a causal S matrix. Field equations are derived from the action principle, without introducing however ill-defined products of field operators at coincident space-time points.
SUPERSYMMETRIC EXTENSION OF LOCAL LORENTZ SYMMETRY
Authors: ABE M. , NAKANISHI N.
Published: November 2004

The locally [Formula: see text]-symmetric extension of the vierbein formalism of the Einstein gravity is systematically reconstructed. The superconnection is defined by the requirement that the vierbein supermultiplet and the [Formula: see text] “vielbein” one have vanishing supercovariant derivatives. By using the superconnection, the globally super-invariant gauge-fixing Lagrangian density and the corresponding FP-ghost one are explicitly constructed. Then the theory is shown to be invariant under the extended BRS symmetry corresponding to the local [Formula: see text] symmetry.
COVARIANT QUANTIZATION OF GREEN-SCHWARZ HETEROTIC SUPERSTRING IN CURVED BACKGROUND
Authors: PASTI P. , TONIN M.
Published: November 2004

We show that the Kallosh-Rahmanov covariant quantization approach for superstrings in rigid superspace can be extended consistently to superstrings propagating in a curved and Yang-Mills background.
PAULI INTERFERENCE EFFECT, K− LIFETIME AND ∆I=1/2 RULE IN K→2π DECAYS
Authors: DU DONGSHENG
Published: November 2004

We estimate the interference effect on K− nonleptonic decay rate in terms of nonrelativistic quark model and the relativistic bag model. The calculation shows that the interference effect is very important. But both models mentioned above fail to describe it correctly. This seems to show that the relativistic effect and the final state interaction between quarks are crucial.
PROTON PRODUCTION IN RELATIVISTIC HEAVY ION COLLISIONS: COMPARISON WITH A THERMODYNAMICAL MODEL
Authors: PARIZET M.J. , ALARD J.P. , RAHMANI A. , MONTAROU G. , AUGERAT J. , BASTID N. , DEMAISON P. , DUPIEUX P. , FRAYSSE L. , MARRONCLE J. , RAHA S. , BABINET R. , FODOR Z. , GOSSET J. , L’HOTE D. , POITOU J. , SCHIMMERLING W. , TERRIEN Y. , VALETTE O. , LEMAIRE M.C. , GORODETZKY P. , RACCA C.
Published: November 2004

Experimental results concerning proton production in nuclear collisions, obtained at Saturne with the Diogene 4π facility, are compared with the predictions of a thermodynamical model, using collective velocity distributions combined with a statistical thermodynamics in local rest frames. Experimental differential cross sections for alpha + nucleus and Neon + nucleus central collisions at incident energies between 200 and 800 MeV per nucleon are well reproduced by the model, for an angular range 30–110 degrees in the laboratory system. Extracted values of the temperatures are compared with those given by other authors.
FINITENESS AND DECOUPLING IN OPEN STRING THEORIES
Authors: GOVAERTS JAN
Published: November 2004

Quantum consistency of open string theories is considered at the one-loop level, using a unified and consistent regularization of all divergences. Finiteness of all amplitudes with open string states is shown to be possible for any SO (n) or USp (n) gauge group. Two consequences of the nonunitarity of tachyonic theories are discussed; the presence of unphysical cuts in amplitudes and the nondecoupling of null states. If not for contributions of the open string tachyon, decoupling of all null open bosonic string states would be obtained for SO (2D/2) independently of the regularization, corresponding to vanishing tadpoles of unphysical closed string states.
A DYSON EQUATION FOR THE TWO-PARTICLE GREEN FUNCTION
Authors: HEISS W. D. , KUO T. T. S.
Published: November 2004

It is shown that the time blocking scheme for the four point function can be used if the single particle lines are dressed. The correct residues of the two-particle Green function are obtained by properly taking into account the ground state correlations.
PATH INTEGRAL AND OPERATOR FORMALISM ON BORDERED RIEMANN SURFACES
Authors: OGURA WAICHI
Published: November 2004

The operator formalism has been developed on the once punctured Riemann surfaces based on a generalized ground state condition in Refs. 6–9. Solving the boundary value problems on bordered Riemann surfaces, we show that the similar conditions are satisfied by a string state defined by the Polyakov path integral. The variational approach of Ohrndorf is confirmed in this context.
FUNDAMENTALLY NEW PHYSICS AT THE TEVATRON COLLIDER?
Authors: CHAN HONG-MO , NELLEN LUKAS , TSUN TSOU SHEUNG
Published: November 2004

A new dispersion relation analysis of present [Formula: see text] scattering data suggests the existence by Tevatron Collider energies of a threshold of such nature as is unlikely to be explainable in terms of known physics or any of its standard projections.
THE NEUTRON ELECTRIC DIPOLE MOMENT
Authors: HE XIAO-GANG , McKELLAR BRUCE H. J. , PAKVASA SANDIP
Published: November 2004

We have made a systematic study of the electric dipole moment (EDM) of neutron Dn in various models of CP violation.

We find that

(i) in the standard KM model with 3 families, the neutron EDM is in the range 1.4 × 10−33 ≤ |Dn| ≤ 1.6 × 10−31 e.cm ,

(ii) the two Higgs doublet model has approximately the same value of Dn as the standard model,

(iii) Dn in the Weinberg model is predicted to satisfy |Dn| > 10−25 e.cm ,

(iv) in a class of left-right symmetric models Dn is of the order of 10−26±1 e.cm ,

(v) in supersymmetric models, Dn is of order 10−22ϕ e.cm with ϕ being the possible phase difference of gluino mass and the gluino-quark-squark mixing matrix,

(vi)the strong CP parameter θ is found to be θ < 10−9, using the present experimental limit that |Dn| < 2.6 × 10−25 e.cm with 90% confidence.
ORDINARY-EXOTIC QUARK MIXING
Authors: RIZZO THOMAS G.
Published: November 2004

We reconsider the possibility that a new Q = −1/3, vector-like, isosinglet quark, h, which can appear in superstring-inspired E6 models, may have appreciable mixing with the usual bottom (b) quark. Using the most recent data on the Kobayashi-Maskawa mixing matrix, ∊, ∊′/∊, [Formula: see text], and [Formula: see text] mixing, we analyze the influence of h on rare processes, e.g., [Formula: see text], b → sγ, and D → μ+μ−.
SOME REMARKS ON SPACE-TIME DECOMPOSITIONS, AND DEGENERATE METRICS, IN GENERAL RELATIVITY
Authors: BENGTSSON INGEMAR
Published: November 2004

Space-time decomposition of the Hilbert-Palatini action, written in a form which admits degenerate metrics, is considered. Simple numerology shows why D = 3 and 4 are singled out as admitting a simple phase space. The canonical structure of the degenerate sector turns out to be awkward. However, the real degenerate metrics obtained as solutions are the same as those that occur in Ashtekar's formulation of complex general relativity. An exact solution of Ashtekar's equations, with degenerate metric, shows that the manifestly four-dimensional form of the action, and its 3 + 1 form, are not quite equivalent.
PARTITION FUNCTIONS OF THE SUPERCONFORMAL GHOST THIRRING MODEL
Authors: FREEDMAN D. Z. , PILCH K.
Published: November 2004

The one-loop partition functions of the superconformal Thirring model for first order b − c and β − γ ghost fields are studied for both closed and open string boundary conditions. Bosonized partition functions are given by formal series which usually diverge because the energy spectrum of the theory is unbounded below as a correlate of nonunitarity. However, the same partition functions are then calculated by path integral methods directly in the fermionic formulation, and well-defined (convergent) integral representations are obtained. A formal series expansion of those integrals reproduces the bosonized partition functions.
FRACTAL STRUCTURES AND CORRELATIONS IN HADRONIC MULTIPARTICLE DISTRIBUTIONS
Authors: CARRUTHERS P.
Published: November 2004

Multihadron rapidity distributions exhibit highly irregular (perhaps fractal) event structure. Application of methods used in nonlinear dynamics to hadronic data is made uncertain by the relatively small number of particles in a given event. We analyze three standard methods to assess their applicability: the Hausdorff (box-counting) method, the correlation dimension, and the information dimension. The Hausdorff method can work for large multiplicities if the fractal set (strange attractor) has simple self-similar behavior. It is noted that addition of points from different events will doubtless erase sponge-like structure characteristic of the attractor. This defect is even greater for the information dimension, whose proper definition requires probabilities whose evaluation involves event averaging. For a fixed attractor, this is of no consequence; however, individual collisions differ by a "noise" effect. The correlation dimension, which has the merit of rapid computational convergence, depends only on relative rapidities |yi − yj| and therefore should not depend on overall rapidity shifts between events. Possible statistical independence of different subsets of a given partition of n particles is analyzed using factorial cumulant moments and information entropy. Additivity of constituent cumulants and entropies is characteristic of statistical independence. Conditional entropies are introduced and used to generalize conventional definitions of information entropy and its (Renyi) generalization.