bluuebunny/crossref_metadata_2025 huggingface dataset:
CHARGED BLACK HOLE SOLUTIONS IN SUPERSTRING THEORY
Authors: ICHINOSE IKUO , YAMAZAKI HIROYUKI
Published: November 2004

Effective Lagrangian in 4-dimensional spacetime is derived from the heterotic string theory. Classical solutions corresponding to the charged black hole are investigated in the effective Lagrangian. At large distance, the solution is essentially the classical Reissner-Nordström-Weyl (RNW) solution. But at the event horizons, the dilaton plays an important role, and the behavior of the solution is drastically different from the RNW solution.
TOPOLOGY AND LATTICES
Authors: BEN-AV RADEL , SOLOMON SORIN
Published: November 2004

The concept of interpolation relates lattice configurations to continuum configurations. This relation induces from the continuum to the lattice the definitions of “continuous deformation”, topological classification and homotopy classes. The lattice homotopy classes obtained this way are separated by boundaries made out of “exceptional configurations” (EC).

The EC boundaries allow the topological classification of the lattice configurations even in models in which it is impossible (or cumbersome) to give in a closed form, a definition of the topological charge in terms of lattice variables.

We give the description of the EC boundaries for the 2-dimensional XY spin model and the 4-dimensional SU(2) gauge model.
QUARK CONFINEMENT AND DYNAMICAL CHIRAL SYMMETRY BREAKDOWN IN QCD
Authors: GOGOKHIA V. , MAGRADZE B.
Published: November 2004

In the framework of the Schwinger-Dyson equation and corresponding Slavnov-Taylor identity in the infrared region, we obtain nonperturbative, infrared finite and gauge-invariant quark propagator, which has no pole (confinement-type solution) and implies dynamical chiral symmetry breakdown (dynamical quark mass generation). Our model is free of ghost complications. Nonperturbative (effective) quark mass is derived, which exhibits an essential singularity in the coupling constant, according to the renormalization group solutions in the infrared region.
THE EQUIVALENCE PRINCIPLE EXPERIMENT FOR SPIN-POLARIZED BODIES
Authors: HSIEH CHANG-HUAIN , JEN PIN-YUN , KO KAI-LI , LI KEH-YANN , NI WEI-TOU , PAN SHEAU-SHI , SHIH YUNG-HUI , TYAN RONG-JUNG
Published: November 2004

We perform an equivalence principle experiment for a magnetically shielded spin-polarized body of Dy 6 Fe 23. We use a single-pan mass comparator to compare the spin-polarized body with an unpolarized group of masses. The equivalence of spin-up and spin-down positions is good to (1.1 ±7.8)×10−9 in earth gravitational field.
CONSISTENCY OF CHIRAL SCHWINGER MODEL IN THE FERMIONIC VERSION
Authors: KIM W.T. , CHO B.H.
Published: November 2004

We obtained the commutator relations which incorporate one-loop correction by using the Bjorken-Johnson-Low (BJL) limit method. The theory can be quantized consistently by considering the full constraint system which is second class at the quantum level.
DOES THERE EXIST A COSMOLOGICAL HORIZON PROBLEM?
Authors: NOVELLO M. , JORDA S.D.
Published: November 2004

We show that for photons nonminimally coupled to gravity, the so-called cosmological horizon problem does not exist.
ASYMPTOTICAL CONFORMAL INVARIANCE IN “FINITE” SU(2) GAUGE THEORIES IN CURVED SPACE-TIME
Authors: ODINTSOV S.D. , ZAPIROV F. SH.
Published: November 2004

The behavior of effective coupling constants in one-loop “finite” SU(2) gauge theories in curved space-time is investigated. It is shown that in strong gravitational field the effective coupling constants, corresponding to the parameters of non-minimal interaction of scalars and gravitational field, tend to the conformal values (asymptotical conformal invariance) or increase in an exponential fashion. The weak gravitational field limit is also considered in the same models.
RADIATIVE MECHANISMS FOR GENERATING QUARK AND LEPTON MASSES: SOME RECENT DEVELOPMENTS
Authors: BABU K.S. , MA ERNEST
Published: November 2004

We review briefly the recent activity in model building for the purpose of generating small, finite, and calculable masses for quarks and leptons, including neutrinos (both Majorana and Dirac). We identify six basic radiative mechanisms, three at the one-loop level and three at the two-loop level, and discuss them in turn.
THERMAL PARTITION FUNCTION OF NON-CRITICAL BOSONIC STRINGS
Authors: SUZUKI HIROSHI
Published: November 2004

The thermal free energy of free non-critical bosonic strings in a D-dimensional spacetime is examined. By integrating (or summing) over the Weyl freedom, the free energy and the one-loop vacuum amplitude are modular invariant for any D<26. Thus the (background) Weyl invariance is realized. In the case of L→∞, where L is the compactification radius of the Weyl mode, the physical spectrum circulating in the loop becomes continuous. A connection between this continuous spectrum and the unitarity of string perturbation theory is briefly mentioned.
A PROOF OF THE ADLER-BARDEEN THEOREM VIA SUPERSYMMETRY
Authors: SPECTOR DONALD
Published: November 2004

A new proof of the Adler-Bardeen Theorem is given for the usual axial anomaly in supersymmetric gauge theories. Surprisingly, the essential ingredient of the proof is the supersymmetry algebra. The argument has the advantage of relying not on detailed calculations, but only on the supersymmetry algebra and on general properties, such as decoupling and the functional formalism.
HANDLE OPERATOR AND QUANTUM STRING EQUATION FROM WILSON’S RENORMALIZATION GROUP
Authors: SAKAI KENJI
Published: November 2004

We show explicitly a relationship between string one-loop amplitudes obtained by using a handle operator and those obtained by using a usual trace formula in the operator formalism on the sphere. Using this relationship we construct the handle operator as a product of two local operators. As a quantum (loop corrected) string equation we derive Wilson’s equation for the general partition function with handle operators.
UNITARITY CONSTRAINT ON GENERAL SUPERSYMMETRY ALGEBRA
Authors: SHIMA KAZUNARI , TANII YOSHIAKI
Published: November 2004

The existence of massless unitary representations of the general supersymmetry algebra, which contains a vector-spinor generator, is examined. It is shown that unitary representations exist when parameters in the algebra satisfy certain relations. However, the algebra in that case turns out to be a trivial extension of the ordinary supersymmetry algebra.
SUPERSYMMETRIC QUANTUM MECHANICS AND HIGHER EXCITED STATES OF A NON-POLYNOMIAL POTENTIAL
Authors: FILHO ELSO DRIGO , RICOTTA REGINA MARIA
Published: November 2004

Supersymmetric quantum mechanics is used to evaluate new exact analytical excited states of the non-polynomial potential: V(x)=x2+λx2/(1+gx2).
BIASES IN SIGNALS FOR INTERMITTENCY DETECTED IN HIGH ENERGY COLLISIONS
Authors: FRIEDLANDER ERWIN M.
Published: November 2004

It is shown that statistical as well as systematic biases may distort the estimates of factorial moments of multiplicity distributions in high energy nuclear collisions. Great caution should be used in interpreting and comparing results of different experiments aimed at the observation of effects due to intermittency.
CLASSICAL CANONICAL OBSERVABLES OF THE NAMBU STRING
Authors: COLOMO F. , LONGHI G. , LUSANNA L.
Published: November 2004

As a prosecution of a preceeding paper, a canonical set of classical observables for the open Nambu string is determined. As a by-product, a local involutory set of constants of motion is found. This result is obtained by determining a canonical transformation to a new set of variables, of which the constraints of the string are a subset. The Poincare algebra is analyzed in terms of the new variables.
CHARGED NEUTRINOS?
Authors: FOOT R. , JOSHI G.C. , LEW H. , VOLKAS R.R.
Published: November 2004

If right-handed neutrinos are added to the Standard Model (SM), then the charge assignments of the quarks and leptons are not fixed by anomaly cancellation, but depend on a free continuous parameter. Thus if right-handed neutrinos exist then it is possible that there also exist small deviations from the canonical assignments of the electric charge, leading to charged neutrinos and neutrons. Experiment is used to limit this parameter. It is pointed out that a nearly massless neutrino with a small charge may nonetheless have large tree-level and anomalous magnetic moments. Ways that the SM might be extended to yield charged neutrinos are indicated.
ON THE ENERGY AND MASS DEPENDENCE OF THE MULTIPLICITY IN RELATIVISTIC HEAVY-ION INTERACTIONS
Authors: ADAMOVICH M. I. , ALEXANDROV Y. A. , CHERNYAVSKY M. M. , GERASSIMOV S. G. , KHARLAMOV S. P. , LARIONOVA V. G. , MASLENNIKOVA N. V. , ORLOVA G. I. , PERESADKO N. G. , SALMANOVA N. A. , TRETYAKOVA M. I. , AGGARWAL M. M. , ARORA R. , BHATIA V. S. , KAUR M. , MITTRA I. S. , BASOVA E. , BONDARENKO R. A. , GULYAMOV U. G. , NASYROV S. H. , PETROV N. V. , SAIDKHANOV N. , TROFIMOVA T. P. , BHALLA K. B. , GILL A. , KUMAR V. , LAL P. , LOKANATHAN S. , MOOKERJEE S. , RANIWALA R. , RANIWALA S. , SHUKLA V. S. , BHASIN A. , KACHROO S. , KAUL G. L. , MANGOTRA L. K. , RAO N. K. , BURNETT T. H. , GROTE J. , LORD J. , SKELDING D. , WILKES R. J. , CAI X. , LIU L. S. , QIAN W. Y. , WANG H. Q. , ZHOU D. C. , ZHOU J. C. , CHERNOVA L. P. , GADZHIEVA S. I. , GULAMOV K. G. , KADYROV F. G. , LUKICHEVA N. S. , NAVOTNY V. S. , SVECHNIKOVA L. N. , DRESSEL B. , GANSSAUGE E. R. , HACKEL S. , KALLIES H. , MUELLER C. , RHEE J. T. , SCHULTZ W. , FRIEDLANDER E. M. , HECKMAN H. H. , LINDSTROM P. J. , GARPMAN S. , OTTERLUND I. , PERSSON S. , SÖDERSTRÖM K. , STENLUND E. , JUDEK B. , STOREY R. S. , SUN J. F. , WENG Z. O. , ZHANG D. H. , XU G. F. , ZHENG P. Y.
Published: November 2004

The average multiplicities of singly charged relativistic particles in oxygen-induced interactions with a nuclear emulsion target are studied over the energy range 2.1–200 A GeV. A similar energy dependence as for proton-induced interactions is observed. Both the number of participating nucleons and the number of binary collisions are shown to be of importance for the particle production.
CHARGE SCREENING AND SPACE DIMENSION
Authors: DIXIT VIJAI V.
Published: November 2004

We consider two static “charges” interacting through the exchange of massless boson “photon” and study the screening which arises when the medium, into which the system is placed, gives a non-vanishing effective mass to the boson. We investigate how the functional form of screening depends on the space dimensions of the problem using a generalized Debye-Hückel formalism and calculate, in particular, the screened form of the linearly rising potential in a three dimensional space.
A FOUR-DIMENSIONAL COUNTERPART OF DIMENSIONAL REGULARIZATION AND FERMION LOOPS
Authors: HOŘEJŠÍ J. , NOVOTNÝ J.
Published: November 2004

Within the framework of a four-dimensional counterpart of the dimensional cut-off scheme the number of spurious axial-vector anomalies in regularized fermion loops is shown to be reduced, in comparison with the canonical ’t Hooft-Veltman scheme. The considered cut-off procedure leads to the same result as the canonical dimensional regularization for the loops involving only vector and axial-vector vertices.
ON BOSE-FERMI EQUIVALENCE IN A U(1) GAUGE THEORY WITH CHERN-SIMONS ACTION
Authors: SHAJI N. , SHANKAR R. , SIVAKUMAR M.
Published: November 2004

We show, using path integral methods, that a complex scalar field in 2+1 dimensions coupled to an abelian gauge field with Chern-Simons action is equivalent to a free Dirac fermion. We show the equivalence of the vacuum functional and construct the fermion fields explicitly. Our proof is independent of the long wavelength approximation.
THE INTERNAL SPIN STRUCTURE OF THE NUCLEON
Authors: FRITZSCH HARALD
Published: November 2004

It is suggested that the constituent quarks entering the SU(6)-scheme of hadrons have an explicit internal spin structure in terms of quarks and gluons. The gluonic contribution to the nucleon spin can be calculated in terms of gA/gV, which gives 25%. The gluonic sea is positively polarized. The recent experimental results of polarized electroproduction can be understood. Predictions about leptoproduction off neutron targets are made.
RADIATIVE AMPLITUDE ZEROS—A TEST OF THE STANDARD MODEL
Authors: SAMUEL KENNETH B. , SAMUEL MARK A.
Published: November 2004

The radiation amplitude zero in the process du→Wγ is studied as a function of the magnetic moments of the W boson (κ) and the quarks (a) where g=κ+1 and a=(g−2)12.

It is shown that the zero occurs only if both κ=1 for the W and a=0 for the quarks. This is now being tested in an experiment underway at the Tevatron (Fermilab) where κ for the W boson can be measured.
LOOP AVERAGES AND PARTITION FUNCTIONS IN U(N) GAUGE THEORY ON TWO-DIMENSIONAL MANIFOLDS
Authors: RUSAKOV B. YE.
Published: November 2004

Loop averages and partition functions in the U(N) gauge theory are calculated for loops without intersections on arbitrary two-dimensional manifolds including nonorientable ones. The physical quantities are directly expressed through geometrical characteristics of a manifold (areas enclosed by loops and the genus) and gauge group parameters (Casimir eigenvalues and dimensions of the irreducible representations). It is shown that, from the physical quantities’ point of view, non-orientability of the manifold is equivalent to its non-compactness.
TORUS-ORBIFOLD EQUIVALENCE IN COMPACTIFIED STRING THEORIES
Authors: SAKAMOTO MAKOTO
Published: November 2004

It is shown that any compactified closed string theory on an abelian orbifold is equivalent to that on a torus if the rank of the gauge symmetry of strings on the orbifold is equal to the dimension of the orbifold. Our proof clarifies the correspondence operators as well as states between the two theories.
ASPECTS OF THE NUCLEAR GEOMETRY IN ULTRA-RELATIVISTIC HEAVY ION COLLISIONS
Authors: STENLUND EVERT
Published: November 2004

In this report I will briefly review experimental observations from ultra-relativistic heavy ion collisions which are directly or indirectly related to the nuclear geometry. Experimental data from the CERN SPS (60 and 200 A Ge V) and from the Brookhaven AGS (14.6 A GeV) will be discussed.
A NEW CLASS OF INFINITE-DIMENSIONAL LIE ALGEBRAS: AN ANALYTICAL CONTINUATION OF THE ARBITRARY FINITE-DIMENSIONAL SEMISIMPLE LIE ALGEBRA
Authors: FRADKIN E. S. , YA. LINETSKY V.
Published: November 2004

With any semisimple Lie algebra g we can associate an infinite-dimensional Lie algebra AC (g) which is an analytic continuation of g from its root system to its root lattice. The manifest expressions for the structure constants of analytic continuations of the symplectic Lie algebras sp 2n are obtained by the Poisson-bracket realizations method and AC (g) for g = sl n and so n are discussed. The representations, central extension, supersymmetric and higher spin generalizations are considered. The Virasoro theory is a particular case where g = sp 2.
PHASE TRANSITION AND HAUSDORFF DIMENSION OF A RIGID BUBBLE
Authors: KOIBUCHI HIROSHI
Published: November 2004

We study a rigid bubble, which is embedded in the continuum Euclidean space as a triangulated spherical random surface and whose action has an extrinsic curvature (or a rigidity) term in addition to the higher derivative gravity action. The crumpling phase transition is numerically investigated. It is found that the order of the phase transition is higher than or equal to 2. The Hausdorff dimension H in the smooth phase is H ~ 2, while in the crumpled phase, H remains finite in the neighborhood of the transition point and grows infinitely as the rigidity coupling goes to zero.
DOMINANCE OF LONG DISTANCE EFFECTS IN THE KL-KS MASS DIFFERENCE
Authors: TERASAKI K. , ONEDA S.
Published: November 2004

It is argued that the asymptotic behavior of the matrix elements of Hw involving on-mass-shell ground-state mesons with infinite momenta, which were instrumental in explaining the |ΔI|=1/2 rule in the K→ππ decays, actually implies [Formula: see text]. The long distance effects (contributions of PS and vector meson poles and ππ intermediate states) may reproduce the observed KL−Ks mass difference, consistent with the |ΔI|=1/2 rule. Its estimate is however sensitive to the η-η′-… mixing.
STRING EQUATIONS FROM UNITARY MATRIX MODELS
Authors: DEMETERFI KREŠIMIR , TAN CHUNG-I.
Published: November 2004

We investigate unitary matrix models in the scaling limit using the method of orthogonal polynomials on the unit circle. We show that, f or a certain choice of coupling constants, string equations belong to the same univesality class as equations obtained from Hermitian matrix models. In addition, we show how a new class of string equations emerges as a consequence of the compactness of the unitary groups.
PROPERTIES OF LOOP EQUATIONS FOR THE HERMITIAN MATRIX MODEL AND FOR TWO-DIMENSIONAL QUANTUM GRAVITY
Authors: AMBJØRN J. , MAKEENKO YU. M.
Published: November 2004

We study the properties of the loop equations for the N × N Hermitian matrix model with arbitrary (even) interaction as well as of their continuum limit, associated with the two-dimensional quantum gravity. We apply the general procedure of iterative solution proposed recently by David. We relate the specific heat to the singular behavior of the connected correlator of two loops. We solve the continuum equation to a few lower orders in the string coupling constant, obtaining results for macroscopic loops including the case of a multicritical fixed point.
AN ANOMALOUS TRANSFORMATION LAW IN SUPERGRAVITY MODELS
Authors: MAGNOLI NICODEMO
Published: November 2004

We demonstrate the existence of an anomalous supersymmetric law of a composite operator in models of supergravity coupled to at least one chiral supermultiplet. After giving two different methods to prove this result, we briefly comment on its possible applications.
ON THE DYON PROBLEM
Authors: STAHLHOFEN ALFONS A.
Published: November 2004

The scattering matrix of a nonrelativistic modified dyon problem is derived from a group-theoretical approach to scattering. The origin of the symmetry restoring modification is discussed. The analogous treatment of a relativistic dyon problem and closely related classical and quantum mechanical problems are summarized.
CONSTANT GAUGE FIELDS AND SYMMETRY BREAKING ON TORUS
Authors: HO CHOON-LIN
Published: November 2004

We examine symmetry breaking in an SU(2) gauge theory with a massless fermion defined on space-time manifold R1, d−3 × T2. Vacuum gauge field configuration is taken to have a constant field strength on the torus. Effective Potential in this background is evaluated and compared with that of pure gauge vacuum configuration. It is found that, in d ≡ 5, 7 (mod 8), vacuum with sufficiently large color magnetic flux on the torus could have lower energy density. This result applies to a U(1) theory as well. For SU(2) theory, the symmetry is broken to U(1).
NECK INFLUENCE ON DYNAMICS OF CLUSTER RADIOACTIVITIES AND COLD FISSION
Authors: POENARU D. N. , MIREA M. , GREINER W. , CĂTA I. , MAZILU D.
Published: November 2004

A two-center parametrization with smoothed neck is used to describe the shapes during the fission process of 234 U in a wide range of mass asymmetry (cold fission with 100 Zr fragment, 28 Mg radioactivity and α-decay). The optimum fission path has been found by minimizing the action integral. The neck influence is stronger for lower mass asymmetry.
A CLASS OF NON-SUPERSYMMETRIC ORBIFOLDS
Authors: TOON A.
Published: November 2004

A classification is made of ℤN (N = 2, 3, 4, and 6) orbifolds which break space-time supersymmetry. Of these, two are promising for a chiral theory. A classification is then made of all possible four-dimensional gauge groups which are possible from the two promising orbifolds.
A CLASSICAL REALIZATION OF QUANTUM ALGEBRAS
Authors: POLYCHRONAKOS ALEXIOS P.
Published: November 2004

We construct a realization of a deformation of the Lie algebra of a group in terms of the generators of the classical Lie algebra of the group. The construction works for arbitrary (odd) deforming functions and, as a special case, it reproduces the standard quantum deformation of the algebra. For all these functions it gives a co-multiplication, that is, a group homomorphism, and provides an antipode and a co-unit. It therefore promotes any arbitrary deformation into a Hopf algebra.
PHASE DIAGRAMS OF 3-MATRIX MODEL
Authors: FUKAZAWA KENJI , HAMADA KEN-JI , SATO HARUTADA
Published: November 2004

We study the phase diagram of the 3-matrix model. This model corresponds to the Blume-Emery-Griffiths (BEG) model on a random surface. The BEG model has parameters J and K which are the spin and the lattice-gas coupling respectively. If K = 0, it is the usual tri-critical Ising model. If K/J = 3, this model becomes the 3-state Potts model. These models are solved in the context of the Coulomb gas representation. The intermediate region K/J = 1 is equivalent to the 3-matrix chain model and we can solve it exactly using the orthogonal polynomial method. We find the 3rd order critical line on which the spin ordering phase transition occurs. This line ends at the 4th order critical point which corresponds to the tri-critical point of the BEG model. The phase diagram is quite similar to that of the BEG model on a regular lattice.
CHIRAL LOG CORRECTIONS TO PSEUDOSCALAR ELECTROMAGNETIC SELF-ENERGIES AND THE RELIABILITY OF DASHEN'S THEOREM
Authors: MALTMAN KIM , KOTCHAN DAVID
Published: November 2004

We investigate the chiral log corrections to the electromagnetic self-energies of the pseudoscalar meson octet and demonstrate that, for the charged pions and kaons, such corrections, at scales μ ~ 1 GeV , are large. We argue that this indicates that leading order chiral results may be misleading in the electromagnetic sector and discuss information on η → 3π and isospin breaking in Kl3 which support this interpretation.
STATISTICAL BAG MODEL FOR BARYONS AND THEIR RESONANCES
Authors: RAJASEKARAN M. , MEENAKUMARI N. , DEVANATHAN V.
Published: November 2004

Incorporating the effects of spin and isospin degrees of freedom in the MIT bag model, the masses of the ground and excited states of baryons are investigated in the framework of a statistical theory. The results are found to agree reasonably well with the experimental data.
EFFECTIVE LAGRANGIAN FOR THE TWO-COMPONENT APPROACH TO THE "PROTON SPIN" PUZZLE
Authors: SCHECHTER J. , SONI V. , SUBBARAMAN A. , WEIGEL H.
Published: November 2004

We display an effective chiral Lagrangian which illuminates the mechanism found by Shore and Veneziano for decomposing the proton matrix element of the axial singlet current into quark and gluonic pieces. The entire matrix element is shown to be proportional to the amplitude for SU(3) singlet exchange in baryon-baryon scattering at zero momentum transfer. An effect of SU(3) symmetry breaking relevant for analysis of the EMC experiment is discussed. In addition, an exact solution is presented for the pseudoscalar quark densities which enter into an alternative method of derivation.
NONPERTURBATIVE 2D QUANTUM GRAVITY VIA SUPERSYMMETRIC STRING
Authors: KARLINER MAREK , MIGDAL SASHA
Published: November 2004

The Parisi-Marinari suggestion to treat 2d quantum gravity as ground state of the 1d supersymmetric string is elaborated in some detail. The third order linear ordinary differential equation describing in the double scaling limit the distribution of eigenvalues of the random matrix (i.e., the Liouville field) is derived and studied numerically. Unlike the Painlevé equation, our equation leads to continuous spectrum; however, the nonperturbative effects display themselves as quantum oscillations on top of smooth WKB distribution. Nonperturbative solution is free of any ambiguities.
HEAVY QUARK JETS IN $p\bar p$ COLLISIONS
Authors: LAMPE B.
Published: November 2004

Calculations of gluon corrections to the two-jet cross-section in [Formula: see text] collisions are presented.
HOW SINGULAR A SPACE CAN SUPERSTRINGS THREAD?
Authors: HÜBSCH TRISTAN
Published: November 2004

Many superstring models with N=1 supergravity in 4-dimensional Minkowski space-time involve σ-models with complex 3-dimensional, Ricci-flat target manifolds. In general, inclusion of singular target spaces probes the boundary of the moduli space and completes it. Studying suitably singular σ-models, the author found certain criteria for the severity of admissible singularizations.
NEW PHYSICS FROM ELECTRIC CHARGE QUANTIZATION?
Authors: FOOT ROBERT
Published: November 2004

Electric charge quantization is re-examined in the standard model.
FERMIONIZATION OF SELF-INTERACTING CHARGED SCALAR FIELDS COUPLED TO ABELIAN CHERN-SIMONS GAUGE FIELDS IN 2+1 DIMENSIONS
Authors: PAUL SAMIR K. , SHANKAR R. , SIVAKUMAR M.
Published: November 2004

We show, to all orders in perturbation theory, that the theory of charged scalars in 2+1 dimensions with a |ϕ|4 self-interaction coupled to Chern-Simons gauge fields is equivalent to a theory of self-interacting fermions with a [Formula: see text] interaction.
SYMMETRIES IN NON-PERTURBATIVE 2-d QUANTUM GRAVITY
Authors: LA HOSEONG
Published: November 2004

Based on the Korteweg-de Vries (KdV) hierarchy formulation of non-perturbative 2-d quantum gravity, we investigate the symmetries of the system. Particularly, it is shown that the recently found Virasoro constraints are due to the non-isospectral symmetries of KdV hierarchy, which can be interpreted as SL(2, C) invariance and the independence of the moduli of the auxiliary infinite genus hyperelliptic Riemann surfaces which appear in the Krichever construction of soliton solutions.
SUPERSYMMETRIC RACAH BASIS, FAMILY OF INFINITE-DIMENSIONAL SUPERALGEBRAS, SU(∞+1|∞) AND RELATED 2D MODELS
Authors: FRADKIN E.S. , LINETSKY V. Ya.
Published: November 2004

The irreducible Racah basis for SU(N+1|N) is introduced. An analytic continuation with respect to N leads to infinite-dimensional superalgebras su(v+1|v). The large-v limit su(∞+1|∞) is calculated. A higher spin Sugawara construction leading to generalizations of the Virasoro algebra with infinite tower of higher spin currents is proposed, and the related WZNW and Toda models as well as the possible applications in string theory are discussed.
NEW METHOD OF MASSIVE FEYNMAN DIAGRAMS CALCULATION
Authors: KOTIKOV A.V.
Published: November 2004

A new method of massive Feynman integrals calculation which is based on the rule of integration by parts is presented. This rule is expanded to the massive case. By applying this rule, we obtain a differential equation with respect to the mass for the initial diagram. The right-hand side of the equation contains simpler diagrams (i.e., containing only loops, not chains). This can be done by applying the procedure consecutively. These loops can be calculated either by the standard Feynman-parameter procedure or by a procedure which decreases the number of loops step-by-step. We demonstrate the capacities of this method for various complicated diagrams and make an attempt to analyze other possible massive Feynman diagrams calculations.
THE EFFECT OF COULOMB SCREENING AND VELOCITY DISTRIBUTION ON FUSION CROSS-SECTIONS AND RATES IN PHYSICAL PROCESSES
Authors: KIM YEONG E. , RICE ROBERT A. , CHULICK GARY S.
Published: November 2004

The Coulomb screening effect, in conjunction with a particle velocity distribution, is shown to greatly enhance the cross-sections and reaction rates for deuteron-deuteron (D-D) and proton-deuteron (p-D) fusion for kinetic energies E≲50 eV in the center of mass (CM) frame. This may help to explain the observed fusion reaction rates from recent low-energy experiments, and indicates that p-D fusion may actually serve as an important source of internal energy for planetary bodies.
ELECTRIC DIPOLE MOMENT OF THE NEUTRON IN THE STANDARD MODEL FROM DYNAMICAL BREAKING OF CHIRAL SYMMETRY
Authors: BANERJEE H. , CHATTERJEE D. , BANERJEE R.
Published: November 2004

Dynamical breaking of chiral symmetry in QCD is a potential source of CP violation in the flavor diagonal Higgs sector of the standard model and can lead to a neutron electric dipole moment of the size reported in recent experiments, provided the mass of the Higgs is constrained by m H ≲42 GeV .
NEW QUANTUM ALGEBRA ASSOCIATED WITH THE EXOTIC SOLUTIONS OF YANG-BAXTER EQUATIONS FOR An
Authors: GE MO-LIN , LIU GUANG-CHUN , XUE KANG
Published: November 2004

Starting from the exotic solutions of Yang-Baxter equation (YBE) associated with the fundamental representations of An the new type of quantum algebra is established.
INTERMITTENCY AND THE ONE-DIMENSIONAL ISING SYSTEM
Authors: SEIXAS J.
Published: November 2004

In this paper I show how 1-dimensional spin systems can be used to simulate rapidity multiparticle distributions and the results one can get by using the methods developed in intermittency studies. The implications for statistical systems will also be discussed.
A DEFORMATION OPERATOR OF THE VIRASORO ALGEBRAIC CONSTRAINTS IN MATRIX MODELS
Authors: CHENG YI-XIN
Published: November 2004

Following the method of Dijkgraaf et al. a deformation operator P(q) is constructed from the KP hierarchy theory. It is explicitly shown that the deformation operator P(q) can be used to define a recursion relation of the Virasoro constraints on the two- and three-matrix models theory, respectively.
KALUZA–KLEIN BOTTLE COUPLED TO TOLMAN–HAWKING WORMHOLE
Authors: DAVIDSON A. , VERBIN Y.
Published: November 2004

Asymptotically Euclidean regions connected by a wormhole may differ by their associated gauge coupling constants. This idea is realized in a field-theoretical manner using a conformally coupled scalar field in five dimensions. An SO (4) × U (1) e.m. -symmetric configuration is derived, describing a Kaluza–Klein bottle coupled to a Tolman–Hawking wormhole.
EXACT S-MATRIX ASSOCIATED WITH SELF-AVOIDING POLYMER PROBLEM IN TWO DIMENSIONS
Authors: ZAMOLODCHIKOV A. B.
Published: November 2004

We propose the exact factorizable S-matrix of the field theory corresponding to the scaling limit of the O(n) vector model with −2 < N < 2 away from the critical point. The limiting case n = 0 describes the scaling properties of the long self-avoiding polymer chains.
TIME VARIATIONS IN KAMIOKANDE SOLAR NEUTRINO DATA
Authors: RAYCHAUDHURI PROBHAS
Published: November 2004

Solar neutrino flux (Eν ≥ 7.5 MeV ) data from 1st January to April 1990 as measured in Kamiokande solar neutrino experiment have been analyzed statistically and have found that the solar neutrino data varies with the solar activity cycle with very high statistical significance (> 98% confidence level). Average solar neutrino flux data in the sunspot minimum range cannot be equal to twice the average solar neutrino flux data in the sunspot maximum range, which suggests that the neutrino flip through the magnetic field of the convection zone of the sun is not responsible for the solar neutrino flux variation. Thus the variation of solar neutrino flux with the solar activity cycle suggests that the solar activity cycle is due to the pulsating character of the nuclear energy generation inside the core of the sun.
Sp(2) COVARIANT QUANTIZATION OF GAUGE THEORIES
Authors: LAVROV P. M.
Published: November 2004

The gauge dependence of the Green's functions generating functionals in the framework of extended Lagrangian BRST quantization is investigated.
THE CLASSICAL EXCHANGE ALGEBRA OF THE 2D EFFECTIVE (2, 0) SUPERGRAVITY IN THE GEOMETRICAL FORMULATION
Authors: AOYAMA S.
Published: November 2004

We will show the classical exchange algebra of the 2D effective (2, 0) supergravity in the geometrical formulation. The key point for the demonstration will be that in this formulation the action has N = 2 superconformal symmetry in the supersymmetric sector, and local N = 2 graded SL (2, ℝ) symmetry non-supersymmetric sector.
PARTIAL ALGEBRAIZATION OF THE NON-POLYNOMIAL POTENTIAL
Authors: FILHO ELSO DRIGO , RICOTTA REGINA MARIA
Published: November 2004

The solutions of the potential x2 + λ[x2/(1 + gx2)] are investigated using partial algebraization of the spectral problem and supersymmetric quantum mechanics.
A SUPERSTRING Z' AT O(1 TeV)?
Authors: FARAGGI ALON E. , NANOPOULOS D. V.
Published: November 2004

We discuss the scale and effects of a new neutral gauge boson, Z', in our recently derived superstring standard-like model, which is a combination of B - L and T3R and provides a mechanism to suppress proton decay. We show that the mass and mixing angle of the Z' with the standard model Z depend only on MZ and MW. For the central values of MZ and MW from recent experiments, MZ'~1000 GeV . We discuss the effect of Z-Z' mixing on the width of the Z and investigate the effect on primordial nucleosynthesis calculations, from which we find that the existence of light right-handed neutrinos with a Z' is excluded unless MZ'≥1.5 TeV .
DETERMINATION OF THE TOP QUARK AND HIGGS BOSON MASSES BY THE REQUIREMENT OF WEAK ISOSPIN SYMMETRY IN RADIATIVE CORRECTIONS
Authors: PESTIEAU JEAN
Published: November 2004

In the SU(2)L × U (1) theory, by the requirement of weak isospin symmetry restoration at the level of radiative corrections, we predict the top quark and Higgs boson masses to be m t =98.6±1.3 GeV , M H =133.5±3.5 GeV , respectively.
CLUSTER-IMPACT FUSION WITH CLUSTER BEAMS
Authors: KIM Y. E. , RICE R. A. , CHULICK G. S. , RABINOWITZ M.
Published: November 2004

Recent experiments in which beams of D 2 O clusters impact on deuterated targets have been observed to produce higher than expected deuterium-deuterium ( D - D ) fusion rates, whereas similar experiments with pure D clusters produced no observable D - D fusion. We present a theoretical model capable of explaining these apparently conflicting experimental results. Our calculations indicate that heavy atoms such as O in the cluster, and Ti, Zr, or C in the target are essential for obtaining high fusion rates and D energy enhancement by double Rutherford backscattering in the experiments as conducted. We predict the conditions for obtaining comparable yields from D , D 2 O , and H 2 O clusters and propose a set of experimental tests.
CHANGE OF DIMENSIONS IN CANONICAL PURE GRAVITY VIA NON-UNITARITY
Authors: PELEG YOAV
Published: November 2004

Examining Wheeler's superspace, [Formula: see text], for manifolds Σ(3)=Σ(2)×S1, we see that the hypersurface of geometries for which the radius of the S1 submanifold tends to zero includes all the geometries of [Formula: see text]. By identifying the Σ(2)-geometries we connect the two superspaces and allow a dynamical change of dimensions. This change of dimensions results in non-conservation of information, and thus non-unitarity. Starting from a vacuum of two-dimensional universes it may be possible to end with a number of three-dimensional universes. A simple example of minisuperspace for Σ(2)=T2, is studied.
A POSSBLE INDICATION OF LARGE 'PENGUIN'-CONTRIBUTIONS TO THE KS→ππ DECAY
Authors: LIU JIANG
Published: November 2004

Experiment data on the decay D0→π+π-, combined with a factorization hypothesis, may be used to estimate the size of 'penguin'-contributions to the ΔI=1/2 kaon decays. The result of such an analysis supports the expectation that the ΔI=1/2 rule in the kaon decays may arise from a large 'penguin'-contribution enhancement.
ON SOLUTIONS TO THE STRING EQUATION
Authors: SCHWARZ ALBERT
Published: November 2004

The set of solutions to the string equation [P,Q]=1, where P and Q are differential operators is described.
A SUM RULE FOR THE CABIBBO MIXING Vus IN THE THREE-STEP QUARK-MASS-GENERATION MODEL
Authors: KOIDE YOSHIO
Published: November 2004

From a matrix-form-independent study of 3×3 quark matrices provided through hierarchical three-step mass-generations, a sum rule is derived. In particular, under some conditions, the sum rule leads to the well known relation [Formula: see text]
DUALITY IN GAUGED WZW MODELS
Authors: KIRITSIS ELIAS B.
Published: November 2004

All anomaly free subgroups of the internal symmetries of a WZW model are classified. It is shown that the gauging of an axial or vector U (1) subgroup provides Conformal Field Theories (CFT) with target manifolds that are dual. Some implications are discussed.
ON THE PHASE DIAGRAM OF THREE-DIMENSIONAL SIMPLICIAL QUANTUM GRAVITY
Authors: BOULATOV D. V. , KRZYWICKI A.
Published: November 2004

The phase diagram of three-dimensional (3d) simplicial quantum gravity is studied using the Monte–Carlo simulation method. It is found that the behavior of the entropy of manifolds, unambiguously defined in this discrete formulation, insures the existence of a vacuum, in spite of the Einstein action being bottomless. A critical line is found as well as some evidence for the existence of a tricritical point. Only to the right of this point, where the bare coupling of the Einstein term in the action is strong enough, a sensible continuum limit can possibly exist.
DOUBLE SCALING IN SUPERSYMMETRIC O(N) VECTOR MODEL
Authors: KHASTGIR S. PRATIK , KUMAR ALOK , MAHARANA JNANADEVA
Published: November 2004

Supersymmetric one-dimensional O(N) vector model is solved in large-N limit. It is shown that the model exhibits a double scaling behavior at a critical value of the coupling constant. Connection of this model with the bosonic vector models is discussed.
SUPERSYMMETRIC GELFAND–DICKEY ALGEBRA
Authors: HUITU K. , NEMESCHANSKY D.
Published: November 2004

We study the classical version of supersymmetric W-algebras. Using the second Gelfand–Dickey Hamiltonian structure we work out in detail W2 and W3-algebras.
ON RADIATIVELY INDUCED FERMION MASS IN (2+1)-DIMENSIONAL GAUGE THEORY WITH A CHERN–SIMONS TERM
Authors: KAO YEONG-CHUAN
Published: November 2004

We study the dynamical generation of parity-odd fermion mass in (2+1)-dimensional topologically massive gauge theory. To one-loop order, the temperature dependence of the induced fermion mass is calculated. The implications of our study pertinent to some recent results concerning the Chern–Simons terms are discussed.
INTERACTION OF DISCRETE STATES IN TWO-DIMENSIONAL STRING THEORY
Authors: KLEBANOV I. R. , POLYAKOV A. M.
Published: November 2004

We study the couplings of discrete states that appear in the string theory embedded in two dimensions, and show that they are given by the structure constants of the group of area preserving diffeomorphisms. We propose an effective action for these states, which is itself invariant under this infinite-dimensional group.
SU(2) WZW THEORIES WITH HERMITIAN PERTURBATIONS
Authors: DURGANANDINI P.
Published: November 2004

We show the existence of higher order conserved quantities of isospin 1 (with spin 0,2,4,6,…) and isospin 0,2 (with spin 1,3,5,7,…) for the k=2 SU(2) WZW theory perturbed by the singlet combination of the isospin 1 primary field. We also show the possible existence of conserved isospin 0 current with spin 3 in the k→∞ limit. We also analyze these theories for finite k(≥3) and show that at least by counting arguments there exist no higher conserved quantities in these cases.
PHASE STRUCTURE OF QCD-LIKE GAUGE THEORIES PLUS FOUR-FERMION INTERACTIONS
Authors: KONDO KEI-ICHI , SHUTO SUSUMU , YAMAWAKI KOICHI
Published: November 2004

We investigate the phase structure of (QCD-like) gauged Nambu-Jona-Lasinio model (QCD-like gauge theories plus four-fermion interactions) based on the ladder Schwinger-Dyson equation with one-loop running gauge coupling. Through analytical and numerial studies, we establish two-fixed points structure, one with a large anomalous dimension γm ≃ 2 and the other with a small one γm ≃ 0. We further obtain the power critical exponents through the equation of state, which, as they stand, imply that the former fixed point is a Gaussian fixed point. We emphasize that logarithmic corrections due to the gauge interaction is crucial to obtaining an interacting continuum theory at this fixed point.
PROPERTIES OF HERMITIAN MATRIX MODELS IN AN EXTERNAL FIELD
Authors: MAKEENKO YU. , SEMENOFF G. W.
Published: November 2004

We consider a Hermitian one-matrix model in an (Hermitian) external field. We drive the Schwinger-Dyson equations and show that those can be represented as a set of Virasoro constraints which are imposed on the partition function. We prove that these Virasoro constraints are equivalent (at least at large N) to a single integral equation whose solution can be found. We use this solution to study properties of the Kontsevich model in genus zero.
LINEARIZED COLLECTIVE SCHRÖDINGER EQUATION WITH SPIN-DEPENDENT POTENTIALS FOR SPIN-3/2 NUCLEI AND APPLICATION TO 187,180,191Ir
Authors: HEUMANN DIRK , GREINER MARTIN , SCHEID WERNER
Published: November 2004

Starting with the linearized free Schrödinger equation for collective quadrupole coordinates which carries a spin-3/2 degree of freedom, we introduce coordinate- and spin-dependent potentials in order to describe even-odd nuclei with nuclear spin 3/2 and positive parity in their ground state. As examples we choose the nuclei 187,180,191 Ir . The obtained energy spectra and B (E2) values agree well with the experimental data.
MINIMAL COUPLING SCHEME FOR DIRAC’S FIELD IN THE NONSYMMETRIC THEORY OF GRAVITATION
Authors: KALINOWSKI M.W.
Published: November 2004

The paper is devoted to the problem of minimal coupling between geometry (gravity) in Moffat’s theory of gravitation and the Dirac field. We obtain a Lagrangian, its hidden local gauge symmetry and a gauge derivative for the spinor field.
1/Nc EXPANSION, QUARK MODEL AND HADRON COLLISIONS AT HIGH ENERGIES
Authors: ANISOVICH V.V. , KOBRINSKY M.N. , NIKONOV V.A. , NYÍRI J.
Published: November 2004

Soft hadron-collision processes at high energies are considered, under the assumption that gluon interactions are short-ranged and that the rules of the 1/Nc expansion are fulfilled. It is shown, that these considerations lead to the scheme of the additive quark model with some relatively large additional effects of colour screening. This colour screening is responsible for the unnatural breaking of the Levin-Frankfurt condition1 and also for the effective increase of cross sections for hadron-nucleus interactions2 if quark bags in nuclei exist, The formation mechanism of fragmentational particles is considered in multiple hadron-production processes.
CANONICAL ACTION-ANGLE FORMALISM FOR QUANTIZED NONLINEAR FIELDS
Authors: GARBACZEWSKI PIOTR
Published: November 2004

The canonical quantizations of field and action-angle coordinates which (locally) parametrize the phase manifold for the same nonlinear field theory model (e.g. sine-Gordon and nonlinear Schrödinger with the attractive coupling) are reconciled on the common for both cases state space. The classical-quantum relationship is maintained in the mean: coherent state expectation values of operators give rise to classical objects.
ON THE STRONG VAN DER WAALS FORCES BETWEEN HADRONS DUE TO CONFINING POTENTIALS
Authors: BARUT A. O. , RACZKA R.
Published: November 2004

The problem of long range forces between hadrons is re-examined. Without color degrees of freedom the confining potentials lead to unacceptably large van der Waals forces. The color degrees of freedom are investigated in the case of mesons taking into account both of the color singlet states of four constituents. The consistency of the color scheme requires the existence of four-quark bound states as well as two separate mesons and puts still restrictions on the confining potentials.
GENERAL CLASS OF SCALAR-TENSOR THEORIES: A REVIEW
Authors: SINGH T. , SINGH TARKESHWAR
Published: November 2004

The general class of scalar-tensor theories is discussed in which, in contrast to Brans-Dicke theory, the coupling parameter ω is not a constant but a function of the scalar field ϕ. Some other generalizations of the Brans-Dicke theory have also been discussed in brief. The physical aspects of these theories have been dealt. The cosmological models in scalar-tensor theories have been discussed in detail. Finally some open problems in these theories have been pointed out.
TWISTED BOSONIC STRINGS AND O(16) ⊗ O(16) HETEROTIC MODEL
Authors: CRISTOFANO G. , MAIELLA G. , MUSTO R. , NICODEMI F. , PETTORINO R.
Published: November 2004

We study the consequences of requiring twisted boundary conditions on [Formula: see text] coordinates of the 26-D bosonic string. In the context of a heterotic model when [Formula: see text] we are led to the tachyonand anomaly-free O (16) ⊗ O (16) model which has been recently discussed in the literature.
Experimental Status of $B^0 \bar{B}^0$ mixing
Authors: Orr Robert S.
Published: November 2004

The experimental status of [Formula: see text] mixing is reviewed. The ARGUS experiment has recently reported evidence for substantial mixing in the [Formula: see text] system. UA1 has also reported evidence for mixing, but this cannot be unambiguously interpreted to yield a measurement of the amount of mixing in the [Formula: see text] system. The CLEO, Mk. II, and JADE experiments have all reported upper limits, and the MAC experiment a lower limit, which are compatible with the ARGUS and UA1 results.
DISPERSION RELATIONS APPROACH FOR HEAVY HIGGS
Authors: Contogouris A.P. , Mebarki N. , Atwood D.
Published: November 2004

The system of interacting Higgs and longitudinal gauge bosons, when the Higgs mass MH varies above 1 TeV, is studied using dispersion relations (N/D method). Models satisfying unitarity and analyticity constraints are constructed and solved exactly. For MH≲0.6 TeV the dispersive and perturbative (tree level) amplitudes are similar. For MH≳1.5 TeV , however, they much differ in structure. For MH≃1.5, in ZZ→ZZ the dispersive amplitudes exceed the perturbative ones by factors 2~4. There are indications of strong interaction effects: In HH→HH there is an ℓ=0 bound state, which can be taken as the Higgs itself; in fact, for MH≃2.5 there is an almost self-consistent solution with respect to the mass, and very roughly with respect to the coupling. There is also some indication of a resonance in ZZ→ZZ, as well as in HH→HH.
SUPERSTRINGS: GROUP REPORT
Authors: ARNOWITT R. , BARGER V. , BARNETT M. , BLAIR R. , CLAVELLI L. , DESHPANDE N.G. , DREES M. , ENQVIST K. , FISHER J. , GODBOLE R. , GUNION J. , HABER H. , HAGIWARA K. , HERRERO M. , HEWETT J. , IGI K. , KARATAS D. , KIM C.S. , MA E. , MENDEZ A. , NANDI S. , NATH P. , RIZZO T. , TRACAS N. , TATA X. , WHISNANT K.
Published: November 2004

A summary is given of the results obtained by the Superstring working group. New physics phenomena arising from superstring models that might be detected at the SSC as well as their possible backgrounds were investigated. Topics examined were models with extra Z bosons and right handed W bosons, detection of Winos, Zinos and gluinos and production of heavy squarkonium.
MULTILEPTON SIGNAL FROM A NEW Z-BOSON AT SSC
Authors: Nandi S.
Published: November 2004

We consider the production of an extra U(1) gauge boson (Z2) (at the SSC) and its decay to a pair of zinos. The subsequent decays of these zinos will give rise to four charged leptons with high pt, and will be an interesting signal for supersymmetry.
HEAVY Z BOSON DECAYS TO W, Z AND HIGGS BOSONS IN E6 SUPERSTRING MODELS
Authors: Barger V. , Whisnant K.
Published: November 2004

We report on the decays of a heavy neutral gauge boson Z2 into W+W−, the Z and a Higgs boson, or two Higgs bosons in superstring-inspired electroweak models with an extra U(1) gauge group, two Higgs doublets and a Higgs singlet. The branching ratios for these processes are generally similar and two boson decay modes of Z2 must exist at the few percent level if kinematically accessible, although the bosonic modes which dominate in any given scenario depend on the U(1) quantum numbers and mixing in the Higgs sector.
THE CHOU-YANG MODEL AND ELASTIC πp SCATTERING AT HIGH ENERGIES
Authors: KAMRAN MUJAHID , QURESHI I.E.
Published: November 2004

By considering 14 different pion and proton form-factor combinations it is shown that the Chou-Yang model is not successful in describing πp elastic data at 200 GeV/c. It is further shown that a modified version in which the proton matter distribution is different from its electromagnetic form factors is able to describe the data well. Aspects of amplitude structure are also discussed.