bluuebunny/crossref_metadata_2025 huggingface dataset:
A NEW FEATURE OF STRONG INTERACTIONS
Authors: ARASH FIROOZ , MORAVCSIK MICHAEL J. , GOLDSTEIN GARY R.
Published: November 2004

Evidence is presented that in a broad energy and angular range, and for a variety of elementary particle reactions driven by strong interactions, the reaction amplitudes in the planar-transverse optimal system are relatively pure real or pure imaginary.
COMPOSITION DEPENDENT FORCES AS SUPERSTRING EFFECTS?
Authors: IVANOV B. V.
Published: November 2004

We show that the exchange of dilaton and compacton scalars which belong to the massless sector of superstring theory leads to the appearance of a composition dependent fifth force.
VIERBEIN IN DE SITTER GAUGE THEORY OF GRAVITY
Authors: KAMIMURA KIYOSHI , FUKUYAMA TAKESHI
Published: November 2004

In the gauge theory of gravity, SO'(5) gauge fields are shown to be related to vierbein and spin connection by a form of gauge transformation with the transformation matrix parametrized by an S4 unit vector [Formula: see text]. It is understood as the collective coordinate parametrizing the vacuum solution of maximal symmetric space. The action of pure gravity theory is determined uniquely (up to surface term) by the requirement that the pure gauge configuration of SO'(5) gauge fields gives the maximally symmetric solution of the equation of motion, i.e., de Sitter space of constant curvature.
THE VILKOVISKY EFFECTIVE ACTION IN THE EVEN-DIMENSIONAL QUANTUM GRAVITY
Authors: BUCHBINDER I. L. , KIRILLOVA E. N. , ODINTSOV S. D.
Published: November 2004

The one-loop Vilkovisky effective potential which is not dependent on a gauge and a parametrization of quantum field, is investigated. We have considered Einstein gravity on a background manifold of (flat space) × (d−4- sphere) or × (d−4- dimensional torus ), d is even, and of R3 × (1- sphere ), where R3 is flat space. The numerical calculation for the cases R4 × Td−4 (d = 6,8,10) and R3 × S1 is done. The solution to the one-loop corrected equations of motion is found, although the spontaneous compactification is not stable in these cases.
EXTRA NEUTRAL GAUGE BOSONS IN e+e−ANNIHILATION INTO HADRONS
Authors: CSIKOR F. , LENDVAI E. , PÓCSIK G.
Published: November 2004

The influence of an extra neutral E6 gauge boson of mass 140–300 GeV on the total cross section of e+e− annihilation into hadrons is studied at energies around the mass of the heavy neutral gauge boson.
WORMHOLES, NON-LOCAL ACTIONS AND A NEW MECHANISM FOR SUPPRESSING THE COSMOLOGICAL CONSTANT
Authors: VENEZIANO G.
Published: November 2004

The connection between wormholes and non-local actions is clarified. Baum-HawkingColeman type singularities correspond to runaway vacua of unbounded actions and can be avoided by appropriate sign flips and/or integration contour rotations. Sticking to saddle points, we find a new mechanism suppressing exponentially the cosmological constant without affecting appreciably other gravitational couplings.
COMMENTS ON COSMOLOGICAL GRAVITATIONAL WAVES BACKGROUND AND PULSAR TIMINGS
Authors: SIGNORE M. , SÁNCHEZ N.
Published: November 2004

We discuss the constraints on the stronger sources of the cosmological gravitational waves background detectable by millisecond pulsars—upper bounds on the cosmic string parameter Gµ, on the anisotropy Δ of the QCD transition phase and, on the dimensionless gravity wave energy. We derive also upper limits on the string parameter from the future binary pulsar timings and confront them with those imposed by current elementary particle phenomenology. We wait for future observations and for new experiments which either detect or place significant constraints on the existence of strings and long wavelength gravity waves—millisecond pulsar plus binary pulsar and the COBE cosmic 3 K anisotropy experiment.
SOME REMARKS ON THE CONSISTENCY OF QUANTUM SUPERMEMBRANES
Authors: PACCANONI F. , PASTI P. , TONIN M.
Published: November 2004

We argue that, for a supermembrane propagating in D=11 supergravity background, κ-symmetry forbids divergent counterterms on shells of higher and higher dimensions. Moreover, we show that the anomalies of the κ-symmetry can be absorbed by consistent quantum corrections of torsion and curvature.
COMPOSITE WEAK BOSONS ASSOCIATED WITH TRANSMUTED GAUGE SYMMETRY
Authors: YASUÈ MASAKI
Published: November 2004

It is shown, from the complementarity viewpoint, that the “flavor” SU (2) L -invariant four Fermi interactions generating composite weak bosons, W and Z, possess a local “color” [Formula: see text] symmetry, which is confined. Through the transmutation of the “color” [Formula: see text] symmetry, the [Formula: see text]-triplet gauge particles are converted into the SU(2)L-triplet composite weak bosons.
TOWARD THE UNDERSTANDING OF K→3π DECAYS IN CHIRAL PERTURBATION THEORY
Authors: CHENG HAI-YANG , CHEUNG C.Y. , YEUNG WAI BONG
Published: November 2004

Corrections to current-algebra analysis of K→3π decay amplitudes are calculated using the dimension-four effective chiral Lagrangians, which are uniquely determined from the integration of nontopological chiral anomalies. We find that the constant and linear terms in the ΔI = ½ amplitude are in good agreement with experiment; the previous discrepancy of 20–35% between current algebra and experiment is thus accounted for by including the higher order chiral Lagrangians. Predictions for quadratic terms are also given for both ΔI = ½ and [Formula: see text] transitions.
ON THE HIGHER-DERIVATIVE CONFORMAL GRAVITY
Authors: SHIN HYUN KUK , PAC PONG YOUL , LEE HAE WON
Published: November 2004

We consider the fourth-order conformal gravity theory. The quantization of the theory is presented in detail. We also calculate, using the heat kernel method, the one-loop divergence and conformal anomaly.
CONFORMALLY COVARIANT DRESSING TRANSFORMATIONS FOR SUPER SELF-DUALITY EQUATIONS IN D=4
Authors: AVAN J.
Published: November 2004

A set of conformally covariant dressing transformations is constructed for the supersym-metric N=3 self-duality equations in four dimensions, using the associated covariant linear system. They form a closed, 5+6-index algebra, up to field-dependent gauge transformations, containing the previously known loop algebras as a particular subset. This construction generalizes the formerly built set of conformally covariant DT for ordinary self-dual Yang-Mills.
HYDRODYNAMIC SIMULATIONS OF 16O+208Pb COLLISIONS AT 200 GeV/N
Authors: McABEE T.L. , WILSON J.R. , ZINGMAN J.A. , ALONSO C.T.
Published: November 2004

We investigate collisions of 16 O with 208 Pb at a bombarding energy of 200 GeV /N in the lab frame. Our basis is an ideal, one-fluid 3-D hydrodynamics model. Several equations of state are used to study the qualitative relation between final baryon rapidity distributions and the stiffness of the EOS. We find that 75% of the baryonic matter lies within one unit of the initial target rapidity, in qualitative agreement with recent experimental data. In addition, our calculation is able to reproduce the integrated value of the dET/dy distribution that is observed experimentally.
A NEW CLOSED FORM EXPRESSION FOR THE TOTAL REACTION CROSS-SECTION OF HEAVY IONS
Authors: REGO R.A. , HUSSEIN M.S.
Published: November 2004

A new analytical expression for the HI total reaction cross-section which exhibits the macroscopic features of the transparency factor is derived. Comparison with optical model calculation are made for the 12 C +208 Pb and 16 O +208 Pb at several energies.
IS THE t QUARK RESPONSIBLE FOR THE MASS OF W AND Z BOSONS?
Authors: MIRANSKY V.A. , TANABASHI MASAHARU , YAMAWAKI KOICHI
Published: November 2004

Based on the dynamical model having a large anomalous dimension γm≃2, we propose that the t quark condensate is responsible for the mass of W and Z bosons within the framework of the SU (3)C×SU(2)L×U(1)Y gauge theory (without Higgs) plus four-fermion interactions among quarks and leptons. This accounts for the largeness of the t quark mass mt without violating the weak-isospin relation [Formula: see text]. Quark/lepton mass matrices are obtained through the four-fermion interactions, which yields no serious flavor-changing neutral currents. The model predicts a [Formula: see text] composite scalar meson with a mass ≃2mt. A possibility for an unusual resolution of the strong CP problem is also suggested.
COVARIANT FIELD THEORY OF CLOSED SUPERSTRINGS
Authors: SIOPSIS GEORGE
Published: November 2004

We construct covariant field theories of both type-II and heterotic strings. Toroidal compactification is also considered. The interaction vertices are based on Witten’s vertex representing three strings interacting at the mid-point. For closed strings, we thus obtain a bilocal interaction.
STRING VACUA AND ORBIFOLDIZED LG MODELS
Authors: VAFA CUMRUN
Published: November 2004

We investigate how string vacua arise from N=2 superconformal models. In particular, we discuss how Landau-Ginzburg models with appropriate central charge can be orbifol-dized to construct string vacua. We develop techniques to compute the degeneracy and quantum numbers of the ground states of the LG models in the twisted sectors, even for the cases where the underlying LG model is not exactly solvable. This allows us to compute some interesting physical quantities such as the number of generations and anti-generations in the simplest compactification scenarios. The results agree with explicit computations in the cases where LG model is exactly solvable.
EVIDENCE FOR INTRINSIC REFLECTION ASYMMETRY IN THE 91-NEUTRON ISOTONES, 153Sm AND 155Gd
Authors: SHELINE R.K. , SOOD P.C.
Published: November 2004

Evidence for intrinsic reflection asymmetry in 153 Sm and 155 Gd is presented. Four parity doublets in 153 Sm (average energy spacings 77.4 keV) and six in 155 Gd (average energy spacings 122 keV) are observed with fast connecting E1 transitions between the PD bands. A tendency toward a hybridized absolute value of the decoupling parameter is also observed in one set of 155 Gd Kπ=1/2± bands.
GRASSMANN COORDINATES FOR PARTICLE CLASSIFICATION
Authors: DELBOURGO R.
Published: November 2004

We show that five complex anticommuting coordinates are sufficient to describe the present particle spectrum, including the possibility of understanding the generation problem.
EXCITED WEAK BOSONS AS MASSIVE GAUGE PARTICLES OF TRANSMUTED $\mathcal{S}\mathscr{U}(2)_L^{{\rm{loc}}} $ SYMMETRY
Authors: YASUÈ MASAKI
Published: November 2004

In a model with weak bosons based on the [Formula: see text] symmetry, excited weak gauge bosons, W* and Z*, are introduced as composites generated by four Fermi interactions. From the complementarity viewpoint that requires a new “color” gauge [Formula: see text] symmetry in addition to the “flavor” [Formula: see text] symmetry, it is argued that the [Formula: see text] model with W* and Z* is equivalent to an [Formula: see text] model with “color” gauge particles. Furthermore, W* and Z* are shown to be identical to the massive gauge bosons of [Formula: see text].
TWO METHODS OF CHIRAL BOSONIZATION
Authors: LINK ROBERT
Published: November 2004

Chiral bosons in two spacetime dimensions can be defined by imposing either a linear or a quadratic chiral constraint on the usual left-right symmetric scalar theory. Although the two quantum theories have different spectra, they both have the same effective action, namely, that a Weyl fermions.
ON THE INTERPRETATION OF MINIMAL LENGTH IN STRING THEORIES
Authors: YONEYA TAMIAKI
Published: November 2004

The existence of a minimal observable length in fundamental string theories has been suggested from recent investigations of the string amplitudes under various extreme conditions. Several observations about the interpretation of this phenomenon are presented. In particular, a new kind of dual indeterminacy relation is suggested as a possible basis of quantum string geometry.
IS THERE A QCD “SPIN CRISIS”?
Authors: VENEZIANO G.
Published: November 2004

A suitable extension of the Goldberger Treiman relation for the singlet axial current is proved, within the standard QCD resolution of the U(1) problem. No appeal is made to large NC or quenched approximations. Implications for the so-called “spin crisis” are discussed.
SCHRÖDINGER REPRESENTATION FOR ABELIAN CHERN-SIMONS THEORIES ON NON-TRIVIAL SPACE-TIMES
Authors: DUNNE GERALD V. , TRUGENBERGER CARLO A.
Published: November 2004

We consider the U(1) Chern-Simons theory on three-manifolds of the form R×Σ, where Σ is a compact Riemann surface of genus g, and quantize the theory in the functional Schrödinger representation. Imposing gauge invariance at the quantum level requires the quantization of the overall normalization parameter k of the action and restricts the Hilbert space to a finite kg-dimensional space of functions on a g-dimensional configuration space. Gauge transformations are realized with a 1-cocycle and the theory is characterized by 2g vacuum angles. We consider the gauge- and coordinate-invariant fixed time operators of the theory, the quantum holonomy operators for closed curves C on Σ, and show that their eigenvalues on physical states are not completely determined by the homology class of C. Rather, there is an additional phase contribution fixed by the oriented self-intersection number of C.
INTERMITTENCY IN MULTIPARTICLE PRODUCTION — A BRIEF EXPERIMENTAL SURVEY
Authors: BUSCHBECK B. , LIPA P.
Published: November 2004

Intermittency patterns of fluctuations in particle production are observed in heavy ion collision experiments, hadron-hadron collision experiments and in e+e− experiments establishing the existence of this phenomenon. Some regularities are reviewed.
ELECTROMAGNETIC DISSOCIATION IN ULTRARELATIVISTIC HEAVY ION REACTIONS
Authors: HEINRICH W. , BRECHTMANN C.
Published: November 2004

Over the last years ultrarelativistic heavy ion beams with energies from 14.5 GeV/nucleon up to 200 GeV/nucleon were accelerated at the Brookhaven and CERN accelerators. We measured total charge changing cross sections and partial fragmentation cross sections for 16 O , 28 Si and 32 S projectiles breaking up into fragments with charges ZF≥6. The measured contributions of electromagnetic dissociation (ED) to the total charges changing cross sections are in agreement with theoretical calculations. By application of factorization rules it is possible to separate measured partial cross sections into a pure nuclear component and into a component caused by ED. The ED component shows a significant contribution from fragmentation events with ΔZ>2 which can be explained by interactions of energetic photons with generation and decay of nucleon resonances in the projectile.
AN ATTEMPT OF p-ADIC ONE-LOOP COMPUTATION
Authors: LEBEDEV D. , MOROSOV A.
Published: November 2004

We demonstrate the problems with evaluating one-loop p-adic quantities for open strings in terms of elementary functions.
THE PROCESS b→sγ
Authors: DESHPANDE N.G. , TRAMPETIC JOSIP
Published: November 2004

The one loop process b→sγ is discussed together with the exclusive mode B→K*γ. Effects of QCD corrections, supersymmetry, fourth generation, and multi-Higgs are also considered.
CONFORMAL IMMERSIONS, STRING EFFECTIVE LAGRANGIANS AND THE c-THEOREM
Authors: HERZIG K. , WEISSGOLD M. , TATARU-MIHAI P.
Published: November 2004

Using the properties of conformal immersions (of world sheets into space-time target manifolds) a string effective lagrangian — valid for any genus — is derived. We contrast our results with those derived via the usual renormalization group approach and we get an interpretation of the Zamolodchikov’s c-theorem. (It is essentially a criterion for the existence of conformal immersions.)

Finally, we discuss the restrictions our formalism imposes on the (structure and dimensions of) space-time.
SOME QUANTUM ASPECTS OF THE REGULARIZATION WITH HIGHER DERIVATIVES
Authors: BARCELOS-NETO J. , BRAGA N.R.F.
Published: November 2004

We discuss the canonical quantization of scalar theory when higher derivative regulating terms are included in the Lagrangian.
GAUGE COSMOLOGICAL MODEL WITH VARIABLE LIGHT VELOCITY: III.: COMPARISON WITH QSO OBSERVATIONAL DATA
Authors: PETIT J.P. , VITON M.
Published: November 2004

After a complement to previous papers on the gauge invariance of the Boltzmann collisional operator, we compare a recent homogeneous set of data on radio-QSOs, including angular sizes and bending of lobes, with what is expected from either our new cosmological gauge model or several conventional models. It is shown that the new gauge model provides a much better fit to the angular size distribution versus redshift than the Friedman model with q0=1 /2, and similarly to the bending, thanks to crude hypotheses on the mechanisms involved with the formation of jets.
ON THE LEFT TO RIGHT HAND TRANSITION PROBABILITY OF NEUTRINOS IN THE SUN
Authors: PULIDO JOÃO
Published: November 2004

The transition probability of left to right solar neutrinos in the sun is calculated in the adiabatic approximation as a function of the neutrino magnetic moment μν and the solar magnetic field depth and strength. We concentrate in the parameter regions compatible with the experimental upper limit μν<1.52×10−10μB and capable of providing a maximum VL→VR conversion. It is found that in the most favorable case (large innermost solar field B~104 G, small convective zone ~105 km and μν at its upper limit), this conversion is about 43% and decreases rapidly with decreasing μν.
TRANSVERSE ENERGY CUT AS CRITERIUM FOR CENTRAL EVENTS IN HIGH ENERGY NUCLEUS-NUCLEUS COLLISIONS
Authors: KUIFA LI , LIANSHOU LIU , YAFEI SHI , GUISHU ZHAO
Published: November 2004

The significance of transverse energy cut in choosing central nucleus-nucleus collision events is discussed. Introducing a characteristic quantity, the number μeqυ of equivalent energy sources in central collision, the whole ET distribution tail is reproduced successfully. This provides a natural way for defining the ET cut as a criterium for central events. The values of μeqυ and the corresponding ET-cut are both proportional to the number of participating nucleons in central collision, showing that this method is self-consistent.
CONFORMAL SUPERALGEBRAS OF HIGHER SPINS
Authors: FRADKIN E.S. , LINETSKY V. Ya.
Published: November 2004

Infinite-dimensional conformal higher spin superalgebras are constructed. Based on the superalgebra in three dimensions, an explicit expression for the effective action is found. In four dimensions, the curvatures of higher spin conformal superalgebras are obtained.
GEOMETRICAL DERIVATION OF THE FADDEEV-POPOV ANSATZ
Authors: ELLICOTT P. , KUNSTATTER G. , TOMS D.J.
Published: November 2004

A geometrical derivation of the Faddeev-Popov measure is presented. This derivation is valid in any gauge for a general class of gauge theories, including Yang-Mills theory, gravitation and non-linear sigma models, and can easily be generalized to include supersymmetric theories. We stress the role of a non-trivial, finite contribution to the effective action from the invariant measure on the orbit over each point in the physical configuration space.
CONFORMAL PARASUPERSYMMETRY IN QUANTUM MECHANICS
Authors: DURAND STEPHANE , VINET LUC
Published: November 2004

Conformal parasupersymmetry of order 2 is exemplified using a one-dimensional quantum mechanical system. Symmetry generators are seen to realize trilinear structure relations. The relevant representations of this novel symmetry algebra are constructed and shown to allow for a complete determination of the energy spectrum and wave functions of the system.
RELATIONSHIP BETWEEN GLUON AND FERMION CONDENSATES IN TWO DIMENSIONAL QCD
Authors: AZAM M. , NAIK SATCHIDANANDA
Published: November 2004

Assuming intermediate vacuum state dominance, it is shown that gluon condensation and chiral symmetry breaking are related to each other in two dimensional QCD.
INTERMITTENCY IN SUPER-HIGH ENERGY COSMIC RAY EVENTS
Authors: GŁADYSZ-DZIADUŚ EWA
Published: November 2004

The factorial moments method described by Białas and Peschanski was used for the investigation of fluctuations in the pseudorapidity distribution of photons and hadrons produced in nine interactions of cosmic-ray particles at an energy of about 1000 TeV. Both electromagnetic and hadronic components of these events reveal very strong intermittent behavior in the total studied region (in the forward hemisphere).
CANONICAL QUANTIZATION, THE DIRAC PROBLEM AND THE ANOMALIES
Authors: PANFIL S.L.
Published: November 2004

The quantization a la Dirac coincides with the canonical one if and only if the anomalies are absent. It is shown that in general this quantization must be modified to be the Lie algebra deformation instead of the homomorphism.
SOLUTION OF A CLASS OF CONFORMAL QUANTUM FIELD THEORY MODELS IN D-DIMENSIONAL SPACE
Authors: FRADKIN E.S. , PALCHIK M.Ya.
Published: November 2004

A method of solving a class of conformal quantum field theory models in D-dimensional Euclidean space-time is proposed. Some of the models are determined by regularized field equations. The method allows us to obtain closed differential equations for each Green function of fundamental and composite fields, and also algebraic equations for scale dimensions of fields. Each D>2-model involves an analogue of the central charge, i.e., a special scalar field P of dimension dP=D−2. When D=2, this becomes a constant field. We also obtain a new class of D=2 models with broken infinite parameter symmetry. Closed differential equation for Green functions of these models are found.
THE MOON AS THE SEARCHING GROUND FOR PROTON DECAY
Authors: PATI J.C. , SALAM ABDUS , SREEKANTAN B.V.
Published: November 2004

The distinct advantage which a lunar detector would have over a terrestrial one in searching for proton decays corresponding to rather long nucleon lifetimes ≳6×1032 yrs is noted.
THE ACTIONS OF THE N=1 AND N=2 SPINNING STRINGS AS CONFORMAL SUPERGRAVITIES
Authors: van NIEUWENHUIZEN P.
Published: November 2004

The action of the N=1 spinning string is shown to be the action of simple conformal supergravity in two dimensions. The constraints read R(P)=R(M)=R(D)=R(Q)=0 and τντµϕν= fμν - ½ gμν f = 0, where ϕμ and fμm are the conformal gravitino and boost field. In the N=2 theory, a new gauge field is found which is needed to close the gauge algebra.
INCLUSIVE REACTIONS AND TOTAL CROSS SECTIONS WITH POLARIZED INITIAL STATES
Authors: GOLDSTEIN GARY R. , MORAVCSIK MICHAEL J.
Published: November 2004

Total cross section measurements and the type of inclusive reactions in which no final-state polarizations are measured are discussed. The numbers and kinds of independent non-zero experiments are given and related to the exclusive reaction amplitudes. Only a well-specified and limited type of bilinear product of exclusive reaction amplitudes enter the picture. Certain classes of theories imply certain simple relationships among the observables. The main results of the investigation are summarized in Sec. 5.
GHOSTS AND THE PHYSICAL MODES IN THE COVARIANT FREE STRING FIELD THEORIES
Authors: ARATYN H. , ZIMERMAN A.H.
Published: November 2004

We present the gauge invariant actions for all free, open and closed (super-) string models, using the differential form formalism. The ghost-for-ghost procedure in the BRS framework is established and leads to the rule for counting the physical degrees of freedom in the free string field theories.
ON OFF-SHELL STATES IN BOSONIC STRING THEORY
Authors: BERSHADSKI M.
Published: November 2004

The bilocal vertex is constructed which may be an off-shell vertex of scalar particle. This vertex consists of spinning operators of the Ashkin-Teller model and their ghost partners.
CONSTRUCTION AND PROPERTIES OF QUASI RICCI FLAT SPACES
Authors: BONNEAU GUY , DELDUC FRANÇOIS
Published: November 2004

We look for the necessary and sufficient conditions for a generalized torsion-free nonlinear σ-model to be one-loop finite. The corresponding metrics are not only Ricci flat ones, but also a larger class we call “quasi Ricci flat” spaces. We give expressions for the corresponding Lagrangian densities in the real and Kähler cases. In the latter, the manifold is shown to be proper, complete and nonhomogeneous. Unfortunately, in the compact case, relevant for string theory, these quasi Ricci flat manifolds become Ricci flat ones.
CONFORMAL FIELD THEORIES WITH ADDITIONAL ZN SYMMETRY
Authors: BERSHADSKY M. , RADUL A.
Published: November 2004

In this paper we construct the correlation functions for ZN twists. These correlation functions are connected with partition function of string propagating on orbifold. Using the correlation functions of Z2 twists we reproduce the two-loop amplitude in the bosonic string theory.
THE ADLER-BARDEEN THEOREM FOR THE AXIAL U(1) ANOMALY IN A GENERAL NON-ABELIAN GAUGE THEORY
Authors: LUCCHESI CLAUDIO , PIGUET OLIVIER , SIBOLD KLAUS
Published: November 2004

A general, regularization-scheme-independent proof of the nonrenormalization theorem for the anomaly of a U(1) axial current in a renormalizable gauge theory is presented. The gauge group may be an arbitrary compact Lie group. The validity of the theorem is traced back to some finiteness properties allowing for a well defined but particular choice of the anomaly operators. Whereas in the case of a purely Abelian gauge group this choice amounts to a physically reasonable normalization at zero energy, the general non-Abelian case awaits a deeper understanding.
AN IMPROVED ONE-LOOP ANALYSIS OF THE λϕ4 THEORY AT FINITE TEMPERATURE
Authors: CHIA SWEE-PING
Published: November 2004

The λϕ4 theory with tachyonic mass is analyzed at T ≠ 0 using an improved one-loop approximation in which each of the bare propagators in the one-loop diagram is replaced by a dressed propagator to take into account the higher loop effects. The dressed propagator is characterized by a temperature-dependent mass which is determined by a self-consistent relation. Renomalization is found to be necessarily temperature-dependent. Real effective potential is obtained, giving rise to real effective mass and real coupling constant. For T < Tc, this is achieved by first shifting the ϕ field by its zero-temperature vacuum expectation value. The effective coupling constant is found to exhibit the striking behavior that it approaches a constant nonzero value as T → ∞.
A NONLINEAR σ-MODEL RELATED TO THE FINE STRUCTURE OF STRINGS
Authors: ABDALLA E. , ABDALLA M. C. B. , SANTOS A. LIMA
Published: November 2004

It is shown that a σ-model related to the strings via Polyakov's construction (up to certain integrability conditions) has classical (but not quantum mechanical) higher conservation laws. In this case, it is argued that the integrability conditions do not spoil the results. When fermions are suitably introduced the exact on-shell solution is discussed. In the locally supersymmetric case the 1/D expansion is used to integrate out the σ-model fields, leaving an effective action for graviton and gravitino.
COSET SPACES AS ALTERNATIVES TO CALABI-YAU SPACES IN THE PRESENCE OF GAUGINO CONDENSATION
Authors: GOVINDARAJAN T. R. , JOSHIPURA ANJAN S. , RINDANI SAURABH D. , SARKAR UTPAL
Published: November 2004

Compactification of the field-theory limit of the E8 × E′8 heterotic string on six-dimensional coset manifolds is discussed, with specific reference to maintaining four-dimensional super-symmetry. By choosing a torsion proportional to the background value of the three-index field Hmnp occurring in the theory it is possible to satisfy the condition of SU(3) holonomy necessary for supersymmetry. However, in all cases considered, it is found impossible to satisfy all the remaining conditions for supersymmetry. If gaugino condensation is assumed to occur, it is possible to preserve supersymmetry satisfying all the modified requirements of supersymmetry for the spaces SU (3)/ U (1) × U (1), G 2/ SU (3) and SO (5)/ SU (2) × U (1). The question of chiral fermions is examined in these cases using the Atiyah-Singer index theorem. Background gauge fields, which correspond to different numbers of generations of chiral fermions, are constructed explicitly. In all these cases the low-energy symmetry group is E6 × E′8.
HEAVY LEPTON PAIR PRODUCTION FROM NEW Z’ RESONANCES
Authors: Hewett J.L. , Rizzo T.G.
Published: November 2004

We examine the possibility that heavy lepton pair production can be significantly enhanced by the existence of a new neutral gauge boson, Z’, at SSC energies. We find that in some models, the heavy lepton production cross section resulting from this mechanism exceeds that from production via other scenarios.
HEAVY FLAVORS
Authors: Cox B. , Soni A.
Published: November 2004

This is a summary report of the working group on Heavy Flavors. Discussions at the workshop were centered on B physics and on the signals for heavy quarks and leptons at the SSC. The Working Group Members were: V. Barger, H.-U. Bengtsson, C. Buchanan, I. Bigi, M. Block, B. Cox, N. Glover, J. Hewett, W.Y. Keung, B. Margolis, T. Rizzo, M. Suzuki, A. Soni, D. Stork, and S. Willenbrock.
Detecting Beauty Baryons and Heavy Beauty Mesons with the J/Ψ Trigger
Authors: Bigi I.I. , Clavelli L.
Published: November 2004

We note that the combination of a vertex detector with a J/Ψ trigger should enable one to measure the masses and lifetimes of various beauty baryons and heavy beauty mesons at the SSC or Tevatron II.
SIGNATURES AND MASS DETERMINATION OF HEAVY TOP QUARKS AT THE SSC
Authors: Bengtsson H.-U. , Glover E.W.N.
Published: November 2004

A simple technique for selecting top quark events and reconstructing the quark mass is given for 100<Mt<200 GeV . Using a charged lepton with large pT to trigger the event, simple attempts to reconstruct the quark mass from jets indicate that the quark mass may be measured to O(10%).
COVARIANT CANONICAL FORMALISM FOR POLYNOMIAL SUPERGRAVITY IN ANY DIMENSION
Authors: LERDA A. , NELSON J.E. , REGGE T.
Published: November 2004

We develop a covariant canonical formalism for supergravity theories and consider Lagrangian densities which are polynomial in the curvatures in any space-time dimension. Our formalism is particularly suited for generic free differential algebras.
BEPC, THE BEIJING ELECTRON-POSITRON COLLIDER
Authors: YE MINGHAN , ZHENG ZHIPENG
Published: November 2004

BEPC, which is the first high energy particle accelerator to be built in the People’s Republic of China, is being constructed in Beijing. It consists of four main subsystems: a 1.4 GeV electron-positron linac, a 2.2–2.8 GeV storage ring, a magnetic spectrometer for high energy physics experiments, and synchrotron radiation facilities. All its components are described here in detail, and the current status of the construction is reported.
ON THE STRUCTURE OF π AND K MESONS
Authors: BANERJEE S.N. , DAS R.K. , SARKER A.K.
Published: November 2004

We have investigated the form factors of the π and K mesons within the framework of the statistical model. Our results reveal several well-spaced minima and maxima for different values of Q2, the square of the momentum transfer. The characteristic features of the elastic differential cross section, dσ/dt, for π±P and K±P scattering data are well reproduced, as a consequence.
NONEQUILIBRIUM DECAYS OF LIGHT PARTICLES AND PRIMORDIAL NUCLEOSYNTHESIS
Authors: DOLGOV A.D. , KIRILOVA D.P.
Published: November 2004

Possible modifications of the standard big-bang nucleosynthesis scenario, which would loosen the bound on the number of neutrino flavors, are examined. A concrete model with light ((mx=O( MeV )) quasistable particles (τx~1 s ) decaying into [Formula: see text] is considered. If the decay products do not thermalize they shift the frozen neutron-to-proton ratio and respectively the abundance of the light element produced primordially. The direction of this shift depends on the parameters of the model. Correspondingly for the particular choice of these parameters the restrictions on the number of neutrino flavors may be considerably weakened.
CONSTRUCTION OF FOUR DIMENSIONAL FERMIONIC STRING MODELS WITH A GENERALIZED SUPERCURRENT
Authors: KAWAI HIKARU , LEWELLEN DAVID C. , HENRY TYE S.-H.
Published: November 2004

The spin structure construction of four-dimensional fermionic string models of the heterotic type is extended by considering a generalized form of the world-sheet super-current. The rules for model building are given and illustrated with two sets of examples: the original spin structure construction and the Z3 asymmetric orbifold.
NEW LEPTONS: AN EXPERIMENTAL REVIEW
Authors: GAN KOCK KIAM , PERL MARTIN L.
Published: November 2004

We review experimental knowledge on what are usually called heavy leptons, but we call new leptons. These are leptons other than the electron, muon, and their associated neutrinos. The measured properties of the tau lepton are surveyed, including a discussion of the inconsistencies in present knowledge of its one-charged-particle decay modes. We summarize experimental limits on the existence of other possible leptons. We conclude the review with a discussion of searches which can be made with the new and proposed particle colliders.
QUANTUM FLUCTUATIONS AND ETERNAL INFLATION IN THE R2MODEL
Authors: COULE DAVID H. , MIJIĆ MILAN B.
Published: November 2004

We show that in the R2 inflationary model, as in the scalar field case, quantum fluctuations at early times can be sufficiently large that the universe evolves like a random walk. Within this picture we describe the resulting global structure of the universe: the so-called “eternal inflation” scenario. Such behavior can naturally fit into a picture of “quantum creation of the universe”. Inflating domains are present today and in fact are growing in number. Approximately every 10−31 s new hot radiation dominated domains are created which occupy a volume larger than all the previously existing Friedmann universes; during the first ~10−9 fraction of this period the power law expanding volume exceeds the inflating volume. Regularly, numerous domains occur where inflation proceeds purely classically and sufficiently to solve the problems of standard cosmology.
ANOMALIES OF BRS AND ANTI-BRS WARD-IDENTITIES IN N=1 SUPERSYMMETRIC THEORY
Authors: LHALLABI T.
Published: November 2004

The requirement of BRS and anti-BRS symmetries in N=1 supersymmetric theory leads to Ward-identities independent of the gauge parameter. The cohomology conditions are immediately satisfied. This yields a supersymmetric formula of the chiral anomaly.
FORM FACTORS IN O(3) NONLINEAR σ-MODEL
Authors: KIRILLOV A.N. , SMIRNOV F.A.
Published: November 2004

Explicit formulas for the form factors of several local operators in 1+1 dimensional O(3) nonlinear σ-model are presented.
INVARIANT CORRELATION FUNCTIONS, SUPERCONVERGENCE SUM RULES, AND ELECTRIC-MAGNETIC DUALITY
Authors: YAMAGISHI HIDENAGA
Published: November 2004

The gauge-invariant correlation function for the Yang-Mills field strengths is shown to admit a symmetric decomposition into electric and magnetic components. The spectral weights are seen to obey a sum rule of the superconvergence type, owing to asymptotic freedom. The close relation between the dielectric function, electric-magnetic duality, and the algebra of generalized Chern-Simons charges is illustrated for the linearized Yang-Mills-Higgs system.
COLD DENSE FERMIONIC MATTER IN THE ELECTROWEAK THEORY: ANISOTROPIC W-BOSON CONDENSATE AT B≠L
Authors: DERYAGIN D.V. , GRIGORIEV D. YU. , RUBAKOV V.A.
Published: November 2004

The one loop effective potential of cold dense fermionic matter is calculated in the standard electroweak theory. It is shown that the anisotropic W-boson condensate is formed at sufficiently high density and B≠L. The anisotropic part of the energy-momentum tensor is calculated for this state. It is shown that this state is metastable, the instability being due to the electroweak baryon number violating transitions.
THE SKYRMION AND ANTI-SKYRMION CHIRAL BAG MODEL FOR THE NUCLEON
Authors: HOSAKA ATSUSHI , TOKI HIROSHI
Published: November 2004

We study a simplified model for the chiral bag plus Skyrmion hybrid model (CSH) in which the vacuum polarization due to the chiral Casimir effect is approximated by the anti-Skyrmion configuration. We closely investigate to what extent this model is available and find it provides a very similar result to those of the CSH model for the bag radius R≳0.4 fm.
COMPACTIFICATION OF SPACE-TIME DIMENSIONS IN LATTICE GAUGE THEORY
Authors: LANG C.B. , PILCH M. , SKAGERSTAM B.-S.
Published: November 2004

The pure SU(2) Yang-Mills gauge field theory is studied in D=5 Euclidean dimensions in which case the continuum theory is nonrenormalizable. By a compactification of one dimension the effective theory, on the tree level, is equivalent to a D=4 SU(2) gauge theory with adjoint scalar fields. In a Monte Carlo (MC) simulation of the lattice regularized theory we confirm the existence of a first order phase transition; on asymmetric lattices we also find a higher order phase “finite temperature” transition. It is argued that the low energy continuum limit of the compactified theory nonperturbatively agrees with the renormalizable adjoint Higgs model in D=4 in the unbroken, confining phase.
SUPERSTRINGS, κ-SYMMETRY AND SUPERSPACE CONSTRAINTS
Authors: TONIN M.
Published: November 2004

This paper deals with the Green-Schwarz formulation of heterotic superstrings, propagating in a background superspace, and its characteristic κ-symmetry. The role of κ-symmetry anomalies, in implementing the superspace constraints, is clarified. A cohomological consistency condition for these anomalies, that strongly restricts their structure, is obtained. The superspace constraints, which follow by requiring that BRST κ-symmetry is preserved at the quantum level, agree with these found recently in the framework of a superspace formulation of SUGRA-SYM models.
GREEN-SCHWARZ ACTION AND LOOP CALCULATIONS FOR SUPERSTRING
Authors: KALLOSH RENATA , MOROZOV ALEXEI
Published: November 2004

We argue that the Green-Schwarz explicitly 10d supersymmetric and 2d covariant approach without spin 1/2 and 3/2 fields on the world sheet may appear suitable for calculations of loops in superstring theory. We show how the cancellation of the Polyakov anomaly is realized, and the answer for the l-loop 4-point amplitudes is reproduced.
QUANTUM UNCERTAINTY IN THE HORIZON SIZE IN AN INFLATIONARY UNIVERSE
Authors: PADMANABHAN T. , SESHADRI T.R.
Published: November 2004

It is shown that uncertainty principle prevents simultaneous, exact measurement of the expansion factor S(t) and its time derivative Ṡ(t) in a FRW universe. We compute the uncertainties in these parameters in the semiclassical limit. It is shown that (i) there is a minimum uncertainty ΔlH in the Hubble distance lH(t)=(Ṡ/S)−1 in a semiclassical universe. (ii) this uncertainty is amplified to an unacceptably large value if there was an inflationary phase in the early universe.
THE ISOSCALAR CHARGE FORM FACTOR IN NUCLEI OF A=2, 3 OBTAINED IN THE SKYRME MODEL
Authors: KLUGER Y. , EISENBERG J.M.
Published: November 2004

The isoscalar exchange currents for nuclear systems consisting of two and three nucleons are studied in the framework of Skyrme’s model for hadrons. For the deuteron we obtain an isoscalar form factor almost identical with that of meson-exchange models; the zero in the single particle form factor near q2≃20 fm−2 is drawn to q2≃19 fm−2, the form factor being also increased in the momentum-transfer range q2>20 fm−2. The isoscalar exchange current in the system of three nucleons draws the zero in the form factor towards values closer to experimental ones, similar to other meson exchange models. In addition to two-nucleon contributions to the current we also treat briefly three-nucleon terms in the A=3 system.
FREE ENERGY AND THE STATIC POTENTIAL FOR OPEN SMOOTH STRINGS
Authors: VISWANATHAN K.S. , XIAOAN ZHOU
Published: November 2004

The methods of Polchinski, and Burgess and Morris are used and extended to evaluate Polyakov’s path integral for open, oriented smooth strings on a cylinder. The smooth string action possesses an (on-shell) invariance under normal variations in the direction of the mean curvature vector of the imbedded surface provided the surface is stationary. Fixing this gauge in the path integral allows one to eliminate all negative norm states arising from higher derivative terms. The free energy and the static potential of the smooth strings are computed. We find that the open smooth strings can be made tachyon-free and has the preferred coefficient −π/6 for the 1/R term in the static potential (for d=4) for large R.
HAMILTONIAN FORMULATION OF THE N=1D=10 SUPERGRAVITY COUPLED TO SUPER YANG-MILLS THEORY
Authors: CAMPOS R. DE AZEREDO , FISCH J.M.L.
Published: November 2004

We derive in full details the Hamiltonian formulation of the N=1D=10 supergravity coupled to super Yang-Mills theory. In particular, we present the explicit form of the first class constraints and compute the constraints gauge algebra.
INTERBARYONIC FORCE AS A SOLITON-SOLITON INTERACTION IN SKYRME MODEL
Authors: HLOUSEK ZVONIMIR
Published: November 2004

We present a general method for calculating the interaction energy of two solitons using the semiclassical, collective coordinate quantization method. The result also has a simple geometrical interpretation. We apply our result in several models, and obtain the expressions for the interaction energy. In particular, we use our method to derive the effective interaction energy of two solitons of Skyrme model. Because the solitons of the Skyrme model can be used to model (in the first approximation) the real world baryons, the interaction energy of two solitons can then be interpreted as an approximation to a two-body nuclear force.
CONSTRUCTING THE SUPERSTRING SPACE-TIME SUSY ALGEBRA IN THE LIGHT-CONE GAUGE
Authors: RESTUCCIA A. , TAYLOR J.G.
Published: November 2004

Closure of the [10] SUSY algebra is attempted for heterotic and type II superstrings by explicit construction of the quartic supersymmetry and Hamiltonian generators. These are shown to possess only contact interactions. Other related nonlinearly realized generators are also constructed at the quartic level, and a substantial part of the [10]-SUSY algebra shown to close with only these generators, for any regularization scheme for the heterotic, and by using phase integration for the type II. Type I superstrings are also considered.
VERTEX OPERATOR CONSTRUCTION OF THE THIRRING MODEL AND THE ASSOCIATED WESS-ZUMINO-WITTEN MODEL IN TWO DIMENSIONS
Authors: FUJITSU AKIRA , KIMURA KAZUHIRO
Published: November 2004

We formulate the Thirring model and the associated U (N) Wess-Zumino-Witten model by a method of the vertex operator construction. Bosonization rules and relations between the two models are also discussed. The singularities derived from the interactions can be systematically removed.
SUPERALGEBRA OF HIGHER SPINS AND AUXILIARY FIELDS
Authors: FRADKIN E.S. , VASILIEV M.A.
Published: November 2004

An infinite-dimensional non-Abelian superalgebra is constructed, denoted as shsa(1), which gives rise at the linearized level to linearized curvatures of both massless and auxiliary fields, suggested previously by one of us (M.V.). Various properties of shsa(1) are analysed in detail. Specifically, subalgebras of shsa(1) are found which pretend themselves for the role of independent superalgebras of higher spins and auxiliary fields. A simple operator realization of shsa(1) is presented. P-reversal automorphisms are constructed. N=2 anti-de Sitter superalgebra osp(2, 4) is shown to be a maximal finite-dimensional subalgebra of shsa(1)/o(2). It is observed that the even (boson) subalgebra of shsa(1) decomposes into the direct sum of two infinite-dimensional Lie algebras each giving rise to massless fields of all integer spins. Possible physical implications of this fact are discussed briefly.
RARE KAON DECAYS
Authors: BRYMAN DOUGLAS A.
Published: November 2004

Major advances spanning several orders of magnitude in sensitivity are anticipated in the current round of experiments dealing with rare kaon decays. Observations of allowed processes, like [Formula: see text] and [Formula: see text], shed light on detailed aspects of the standard model. New sources of T or CP violation could be manifested by measurements of muon polarization in K → πμνμ and [Formula: see text] decays and by studies of reactions like [Formula: see text]. Evidence for new particles and new interactions could appear in advanced efforts to observe K → πxx′ and K → πx decays, where x and x′ represent hypothetical neutral particles, and in searches for lepton flavor violating processes [Formula: see text] and K+ → π+μe. The experiments are reviewed and their theoretical context is discussed.
STATUS OF THE $\Delta I =\frac{1}{2}$ RULE IN KAON DECAY
Authors: CHENG HAI-YANG
Published: November 2004

The [Formula: see text] rule in K → ππ decays and its status are discussed and reviewed. First, we present the phenomenological deductions which have a firm basis, including the penguin diagram, vacuum insertion, current algebra and chiral perturbation theory. Then we proceed to discuss new conjectures and speculations e.g. 1/N expansion, W-exchange, low-energy penguin diagrams, the s - d self-energy tadpole, QCD-duality, instanton effects, etc. and to assess their roles in understanding the [Formula: see text] enigma.
ALGEBRAIC BETHE ANSATZ SCHEME FOR RELATIVISTIC INTEGRABLE FIELD THEORIES IN CONTINUUM-: SINE-GORDON MODEL
Authors: BHATTACHARYA GAUTAM , GHOSH SASANKA
Published: November 2004

The linear problem associated with the Lax operator of the classical sine-Gordon theory can be recast into the monodromy matrix form that can be extended to quantum theory as well. Product of the quantum monodromy matrices will have contributions from the singularities arising out of the operator product expansions of sine-Gordon field. This enables one to find the star-triangle relations. This is a generalization of the method used by Thacker for the non-relativistic nonlinear Schrödinger field theory. In the infinite volume limit, it leads to an unambiguous description of the algebra involving the scattering data operators. Starting from a vacuum the module of physical states are constructed by the application of chains of the scattering operators and they turn out to have definite eigenvalues of energy and momentum. The mass-spectra and two-particle S matrix elements can be calculated straightforwardly and they coincide with the well-known results of Zamolodchikov and Zamolodchikov. It is also shown that the particle states can be created by a generalized Jordon-Wigner transformation of the free fermionic creation operators — thus establishing a link between the S matrix element and certain co-cycles.
GAUGE-INVARIANT RENORMALIZABILITY OF NON-ABELIAN STOCHASTICALLY QUANTIZED THEORIES
Authors: YA. FAINBERG V. , SUBBOTIN A. V.
Published: November 2004

The generating functional of a stochastically quantized non-Abelian theory is formulated in a gauge-invariant form in the nonequilibrium phase in (D + 1) dimensions. In the gauge [Formula: see text], μ = 1, … D, in the case of dimensional regularization, this formulation is shown to be completely equivalent (in perturbation theory) to the usual stochastic quantization with an addition to the Langevin equation of the Zwanziger type term [Formula: see text] for a rather wide class of functionals υ (A). In dimensional regularization, the determinant due to ghost fields is equal to unity in perturbation theory but has Gribov's zeros in nonperturbative calculations. The effective action in a generating functional possesses BRST-symmetry from which one can derive Ward-Fradkin-Takahashi-Slavnov-Taylor identities (WI) that provide the connections between the renormalization constants of vertices and fields and the gauge-invariant renormalizability of the theory in nonequilibrium and equilibrium phases for D ≤ 4. The renormalization constants of fields and parameters are calculated in dimensional regularization in the one-loop approximation; it is shown that due to the nontrivial renormalization of the kinetic coefficient in nonequilibrium phase, the β functions turn out to be distinct in these phases, in four dimensions the β function coinciding with the ordinary one in equilibrium phase. Fulfillment of the principal WI in perturbation theory is checked.