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10,900
['eng']
['Brax, P', 'Turok, Neil G']
['Exponentially Small Couplings and the Hierarchy Problem']
['Particle Physics - Theory']
['gauge field theory, SU(3)', 'Higgs model', 'supersymmetry, superfield', 'hierarchy', 'dimension, 5', 'string model']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706035']
['We propose a stringy mechanism whereby a large hierarchy between symmetry breaking scales is generated. This mechanism is based upon the existence of a fifth dimension compactified on a segment. We focus on a simple supersymmetric model with one massless Higgs field in the 3 of SU(3) and another one in the supersymme...
['1997-06-06']
10,901
['eng']
['Belopolsky, A']
['Picture changing operators in supergeometry and superstring theory']
['Particle Physics - Theory']
['string model', 'supersymmetry, superspace', 'differential forms', 'operator, picture changing', 'commutation relations', 'phase space', 'mathematical methods']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706033']
['Geometrical meaning of superstring pictures is discussed in details. An off-shell generalization of the picture changing operation and its inverse are constructed. It is demonstrated that the generalised operations are inverse to each other on-shell while off-shell their product is a projection operator.']
['1997-06-05']
10,902
['eng']
['Bakas, Ioannis', 'Bourdeau, M', 'Lópes-Cardoso, G']
['Supersymmetric Solutions in Three-Dimensional Heterotic String Theory']
['Particle Physics - Theory']
['string model, heterotic', 'spontaneous compactification, torus', 'effective action', 'dimension, 3', 'supersymmetry, soliton']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706032']
['We consider the low-energy effective field theory of heterotic string theory compactified on a seven-torus, and we construct electrically charged as well as more general solitonic solutions. These solutions preserve 1/2, 1/4, 1/8 and 1/16 of N=8, D=3 supersymmetry and have Killing spinors which exist due to cancellat...
['1997-06-05']
10,903
['eng']
['Amelino-Camelia, G', 'Lukierski, J', 'Nowicki, A']
['$\\kappa$-Deformed Covariant Phase Space and Quantum-Gravity Uncertainty Relations']
['Particle Physics - Theory']
['phase space, relativistic', 'phase space, deformation', 'algebra, Heisenberg', 'uncertainty relations', 'quantum gravity', 'space-time, measurement']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706031']
["We describe the deformed covariant phase space corresponding to the so-called kappa-deformation of D=4 relativistic symmetries, with quantum ``time'' coordinate and Heisenberg algebra obtained according to the Heisenberg double construction. The associated modified uncertainty relations are analyzed, and in particula...
['1997-06-05']
10,904
['eng']
['Gabriel, C', 'Spindel, P', 'Massar, S', 'Parentani, R']
['Interacting Charged Particles in an Electric Field and the Unruh Effect']
['Particle Physics - Theory']
['space-time', 'charged particle', 'counters and detectors, acceleration', 'electric field, external field', 'scattering amplitude', 'Unruh effect', 'quantization, 2', 'thermodynamics']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706030']
["We compute the transition amplitudes between charged particles of mass $M$ and $m$ accelerated by a constant electric field and interacting by the exchange of quanta of a third field. We work in second quantization in order to take into account both recoil effects induced by transitions and the vacuum instability of ...
['1997-06-05']
10,905
['eng']
['Etesi, G']
['Spontaneous Symmetry Breaking in SO(3) Gauge Theory to Discrete Subgroups']
['Particle Physics - Theory']
['gauge field theory, SO(3)', 'symmetry, spontaneously broken', 'potential, Higgs', 'symmetry, SU(2)']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706029']
['A systematical description of possible symmetry breakings in the SO(3) gauge theory and an algorithmical method to construct SU(2) or SO(3) invariant Higgs potentials in an arbitrary irreducible representation is given. We close our paper with the explicit construction of the Lagrangian of the simplest SO(3) theory v...
['1997-06-05']
10,906
['eng']
['Brax, P', 'Turok, Neil G']
['Exponentially Small Couplings between Twisted Fields of Orbifold String Theories']
['Particle Physics - Theory']
['any-dimensional', 'field theory, scalar', 'string model, heterotic', 'spontaneous compactification', 'field theory, orbifold', 'scattering amplitude', 'analytic properties', 'coupling constant, dependence']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706028']
['We investigate the natural occurence of exponentially small couplings in effective field theories deduced from higher dimensional models. We calculate the coupling between twisted fields of the Z_3 Abelian orbifold compactification of the heterotic string. Due to the propagation of massive Kaluza-Klein modes between ...
['1997-06-05']
10,907
['eng']
['Fujikawa, K', 'Okuyama, K']
['On a Lorentz covariant matrix regularization of membrane theories']
['Particle Physics - Theory']
['membrane model, boson', 'matrix model', 'regularization', 'Hamiltonian formalism', 'differential forms, symplectic', 'invariance, Lorentz']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706027']
['A Lorentz covariant matrix regularization of membrane thories is studied.It is shown that the action for a bosonic membrane can be defined by matrix regularization in a Lorentz covariant manner. The generator of area preserving diffeomorphism can also be consistently defined by matrix regularization, and we can make ...
['1997-06-05']
10,908
['eng']
['Wakimoto, M']
['A construction of N=2 and centerless N=4 superconformal fields via affine superalgebras']
['Particle Physics - Theory']
['supersymmetry, algebra', 'algebra, conformal', 'algebra, representation', 'algebra, Lie', 'algebra, affine', 'operator product expansion']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706026']
['In this note we give a new construction of the N=2 superconformal algebra using currents of the affine superalgebra $\\hat{sl}(2|1)$ and free bosonic fields, and also the N=4 superconformal algebra without central charge in terms of currents of $\\hat{sl}(2|2)$ and free bosonic fields.']
['1997-06-05']
10,909
['eng']
['Lawrence, A', 'Nekrasov, N A']
['Instanton sums and five dimensional gauge theories']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'field theory, M-theory', 'spontaneous compactification', 'dimension, 5', 'gauge field theory, action', 'instanton', 'moduli space', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706025']
['We analyze the vector multiplet prepotential of d=4, N=2 type IIA compactifications. We find that the worldsheet instanton corrections have a natural interpretation as one-loop corrections in five dimensions, with the extra dimension being compactified on a circle of radius $g_{s}\\ell_{s}$. We argue that the relatio...
['1997-06-05']
10,910
['eng']
['Metsaev, R R']
['Free totally (anti)symmetric massless fermionic fields in d-dimensional anti-de Sitter space']
['Particle Physics - Theory']
['field theory, massless', 'fermion, spin', 'space-time, anti-de Sitter', 'any-dimensional', 'group theory, SO(N,2)', 'group theory, representation', 'transformation, gauge']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9707066']
['Free massless fermionic fields of arbitrary spins $s>0$ corresponding to totally (anti)symmetric tensor-spinor representations of the $SO(d-1)$ compact subgroup and in $d$-dimensional anti-de Sitter space are investigated. We propose the free equations of motion, subsidiary conditions and corresponding gauge transfor...
['1997-07-08']
10,911
['eng']
['Berkovits, N']
['Ramond-Ramond Central Charges in the Supersymmetry Algebra of the Superstring']
['Particle Physics - Theory']
['string model', 'supersymmetry, algebra', 'central charge', 'field theory, action', 'dimension, 10']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706024']
['The free action for the massless sector of the Type II superstring was recently constructed using closed RNS superstring field theory. The supersymmetry transformations of this action are shown to satisfy an N=2 D=10 SUSY algebra with Ramond-Ramond central charges.']
['1997-06-05']
10,912
['eng']
['Lee, K', 'Yi, P']
['A Family of N=2 Gauge Theories with Exact S-Duality']
['Particle Physics - Theory']
['membrane model, p-brane', 'p-brane, 3', 'membrane model, D-brane', 'field theory, F-theory', 'gauge field theory, Sp(N)', 'field theory, tensor', 'duality', 'soliton', 'fluctuation', 'approximation, quasiclassical']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706023']
['We study an infinite family of N=2 $Sp(2n)$ gauge theories that naturally arise from the D3-brane probe dynamics in F-theory. The matter sector consists of four fundamental and one antisymmetric tensor hyper multiplets. We propose that, in the limit of vanishing bare masses, the theory has the exact $SO(8)\\sdtimes S...
['1997-06-05']
10,913
['eng']
['Welling, M']
['Explicit solutions for Point Particles and Black Holes in spaces of constant curvature in 2+1-D Gravity']
['Particle Physics - Theory']
['gravitation', 'space-time, Minkowski', 'dimension, 3', 'matter', 'astrophysics, fundamental constant', 'Einstein equation, solution', 'black hole', 'Gauss-Bonnet theorem', 'space-time, anti-de Sitter', 'space-time, de Sitter', 'monodromy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706021']
['In this paper we consider space-times containing matter expanding or contracting according to a time-dependent scale factor. Cosmologies with vanishing, positive or negative cosmological constant are considered. In the case of vanishing or negative cosmological constant open and closed spatial surfaces are solutions ...
['1997-06-05']
10,914
['eng']
['Dabrowski, M P', 'Larsen, A L']
['Strings in Homogeneous Background Spacetimes']
['Particle Physics - Theory']
['space-time, anisotropy', 'string model', 'field equations, solution']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706020']
['The string equations of motion for some homogeneous (Kantowski-Sachs, Bianchi I and Bianchi IX) background spacetimes are given, and solved explicitly in some simple cases. This is motivated by the recent developments in string cosmology, where it has been shown that, under certain circumstances, such spacetimes appe...
['1997-06-05']
10,915
['eng']
['Bassetto, A', 'Colferai, D', 'Nardelli, G']
['$q\\overline{q}$ interaction in light-cone gauge formulations of Yang-Mills theory in 1+1 dimensions']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'dimension, 2', 'light cone gauge', 'quark antiquark, interaction', 'Wilson loop']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706019']
["A rectangular Wilson loop with sides parallel to space and time directions is perturbatively evaluated in two light-cone gauge formulations of Yang-Mills theory in 1+1 dimensions, with ``instantaneous'' and ``causal'' interactions between static quarks. In the instantaneous formulation we get Abelian-like exponentiat...
['1997-06-05']
10,916
['eng']
['Kim, Y W', 'Rothe, Klaus D']
['BFT Hamiltonian Embedding of Non-Abelian Self-Dual Model']
['Particle Physics - Theory']
['gauge field theory, tensor', 'nonabelian', 'quantization, constraint', 'Hamiltonian formalism']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706018']
['Following systematically the generalized Hamiltonian approach of Batalin, Fradkin and Tyutin, we embed the second-class non-abelian self-dual model of P. K. Townsend et al into a gauge theory. The strongly involutive Hamiltonian and constraints are obtained as an infinite power series in the auxiliary fields. By form...
['1997-06-05']
10,917
['eng']
['Guida, R', 'Magnoli, N']
['Vacuum Expectation Values from a variational approach']
['Particle Physics - Theory']
['field theory, conformal', 'perturbation', 'Ising model', 'operator product expansion', 'renormalization group', 'infrared problem', 'numerical calculations, variational']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706017']
["In this letter we propose to use an extension of the variational approach known as Truncated Conformal Space to compute numerically the Vacuum Expectation Values of the operators of a conformal field theory perturbed by a relevant operator. As an example we estimate the VEV's of all (UV regular) primary operators of ...
['1997-06-05']
10,918
['eng']
['Kim, H']
['Axionic Wormholes']
['Particle Physics - Theory']
['space-time', 'axion', 'field theory, tensor', 'wormhole', 'quantization', 'minisuperspace', 'quantum cosmology']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706015']
["As a system which is known to admit classical wormhole instanton solutions, Einstein-Kalb-Ramond (KR) antisymmetric tensor theory is revisited. As an untouched issue, the existence of fermionic zero modes in the background of classical axionic wormhole spacetime and its physical implications is addressed. In particul...
['1997-06-05']
10,919
['eng']
['Dunne, G', 'Feinberg, J']
['Self-Isospectral Periodic Potentials and Supersymmetric Quantum Mechanics']
['Particle Physics - Theory']
['quantum mechanics', 'supersymmetry', 'zero mode', 'potential', 'energy spectrum', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706012']
["We discuss supersymmetric quantum mechanical models with periodic potentials. The important new feature is that it is possible for both isospectral potentials to support zero modes, in contrast to the standard nonperiodic case where either one or neither (but not both) of the isospectral pair has a zero mode. Thus it...
['1997-06-03']
10,920
['eng']
['Diego, O']
['Reduction of the number of degrees of freedom in the large N limit of matrix models']
['Particle Physics - Theory']
['matrix model', 'expansion 1/N', 'continuum limit', 'Riemann surfaces', 'partition function', 'measure', 'group theory, unitarity', 'potential', 'saddle-point approximation']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706011']
['In this paper, a reduction of the number of degrees of freedom in the large N limit of matrix models is shown. It is claimed that this is a general result of the large N limit. This result is applied to solve the large N limit of hermitian matrix models with a gaussian coupling to an external matrix. The particular m...
['1997-06-03']
10,921
['eng']
['Kim, H']
['The Absence of Fermionic Superradiance']
['Particle Physics - Theory']
['relativity theory, general', 'fermion', 'gravitational radiation', 'black hole, Kerr']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706010']
['Superradiant scattering, which can be thought of as the wave analogue of the Penrose process is revisited. As is well-known, boson fields display superradiance provided they have frequency in a certain range whereas fermion fields do not. A succinct superradiance-checking algorithm employing particle number or energy...
['1997-06-03']
10,922
['eng']
['Nojiri, S', 'Odintsov, S D']
['Trace Anomaly and Non-Local Effective Action for 2D Conformally Invariant Scalar Interacting with Dilaton']
['Particle Physics - Theory']
['dilaton', 'dimension, 2', 'invariance, conformal', 'anomaly', 'effective action, nonlocal', 'field theory, scalar', 'back reaction']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706009']
['Using the results of the calculation of the one-loop effective action (E. Elizalde et al , Phys.Rev. D49 (1994) 2852), we find the trace anomaly for most general conformally invariant 2D dilaton coupled scalar-dilaton system (the contribution of dilaton itself is included). The non-local effective action induced by c...
['1997-06-03']
10,923
['eng']
['Kim, H']
['Notes on Spinning $AdS_3$ Black Hole Solution']
['Particle Physics - Theory']
['relativity theory, general', 'Einstein equation, solution', 'black hole', 'angular momentum', 'thermodynamics', 'space-time, anti-de Sitter', 'causality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706008']
['By applying Newman\'s method, the AdS_3 rotating black hole solution is "derived" from the nonrotating black hole solution of Banados, Teitelboim and Zanelli (BTZ). The rotating BTZ solution derived in this fashion is given in "Boyer-Lindquist-type" coordinates whereas the form of the solution originally given by BTZ...
['1997-06-03']
10,924
['eng']
['Dorey, N', 'Khoze, V V', 'Mattis, M P', 'Slater, M J', 'Weir, W A']
['Instantons, Higher-Derivative Terms, and Nonrenormalization Theorems in Supersymmetric Gauge Theories']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'supersymmetry', 'instanton', 'expansion, gradient', 'scaling', 'field theory, finite', 'derivative, high', 'renormalization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706007']
['We discuss the contribution of ADHM multi-instantons to the higher-derivative terms in the gradient expansion along the Coulomb branch of N=2 and N=4 supersymmetric SU(2) gauge theories. In particular, using simple scaling arguments, we confirm the Dine-Seiberg nonperturbative nonrenormalization theorems for the 4-de...
['1997-06-03']
10,925
['eng']
['Setlur, G S']
['Exact Single-Particle Green Functions of Bose and Fermi Liquids']
['Particle Physics - Theory']
['boson, liquid', 'fermion, liquid', 'propagator', 'random phase approximation', 'momentum spectrum', 'field theory, any-dimensional']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706006']
["Based on a class of exactly solvable models of interacting bose and fermi liquids, we compute the single particle propagators of these systems exactly for all wavelengths and energies and in any number of spatial dimensions. The field operators are expressed in terms of bose fields that correspond to displacements of...
['1997-06-03']
10,926
['eng']
['Perevalov, E V', 'Rajesh, G']
['Mirror Symmetry via Deformation of Bundles on K3 Surfaces']
['Particle Physics - Theory']
['field theory, F-theory', 'spontaneous compactification', 'field theory, Calabi-Yau', 'field theory, Kaehler', 'string model, heterotic', 'symmetry breaking', 'group theory']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706005']
['We consider F-theory compactifications on a mirror pair of elliptic Calabi-Yau threefolds. This yields two different six-dimensional theories, each of them being nonperturbatively equivalent to some compactification of heterotic strings on a K3 surface S with certain bundle data E --> S. We find evidence for a transf...
['1997-06-03']
10,927
['eng']
['Kim, H']
['Quantum Brans-Dicke Gravity in Euclidean Path Integral Formulation']
['Particle Physics - Theory']
['Brans-Dicke model', 'transformation, conformal', 'quantum gravity', 'path integral, Euclidean']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706004']
['The conformal structure of Brans-Dicke gravity action is carefully studied. It is discussed that Brans-Dicke gravity action has definitely no conformal invariance. It is shown, however, that this lack of conformal invariance enables us to demonstrate that Brans-Dicke theory appears to have a better short-distance beh...
['1997-06-03']
10,928
['eng']
['Konechny, A', 'Schwarz, A']
['On $(k \\oplus l|q)$-dimensional supermanifolds']
['Particle Physics - Theory']
['supersymmetry, superspace', 'differential geometry', 'field theory, conformal', 'dimension, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706003']
['We define a $(k\\oplus l|q)$-dimensional supermanifold as a manifold having q odd coordinates and k + l even coordinates with l of them taking only nilpotent values. We show that this notion can be used to formulate superconformal field theories with different number of supersymmetries in holomorphic and antiholomorp...
['1997-06-03']
10,929
['eng']
['Ezawa, K', 'Matsuo, Y', 'Murakami, K']
['BPS Configuration of Supermembrane With Winding in M-direction']
['Particle Physics - Theory']
['field theory, M-theory', 'membrane model', 'supersymmetry, algebra', 'invariance, Lorentz', 'dimension, 11', 'diffeomorphism, constraint', 'field theory, vector', 'differential equations, solution']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706002']
['We study de Wit-Hoppe-Nicolai supermembrane with emphasis on the winding in M-direction. We propose a SUSY algebra of the supermembrane in the Lorentz invariant form. We analyze the BPS conditions and argue that the area preserving diffeomorphism constraints associated with the harmonic vector fields play an essentia...
['1997-06-03']
10,930
['eng']
['Dolotin, V V']
['QFTs With Action of Degree 3 and Higher and Degeneracy of Tensors']
['Particle Physics - Theory']
['field theory, action', 'derivative, high', 'differential forms', 'partition function', 'operator, determinant', 'correlation function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706001']
['In this paper we develop a technique of computation of correlation functions in theories with action being cubic or higher degree form in terms of discriminants of corresponding tensors. These are analogues of formula']
['1997-06-03']
10,931
['eng']
['Bailin, David', 'Kraniotis, G V', 'Love, A']
['CP Violation by Soft Supersymmetry Breaking Terms in Orbifold Compactifications']
['Particle Physics - Theory']
['violation, CP', 'supersymmetry, symmetry breaking', 'supersymmetry, superfield', 'field theory, orbifold', 'spontaneous compactification', 'dilaton', 'potential, nonperturbative']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705244']
['The possibility of spontaneous breaking of $CP$ symmetry by the expectation values of orbifold moduli is investigated with particular reference to $CP$ violating phases in soft supersymmetry breaking terms. The effect of different mechanisms for stabilizing the dilaton and the form of the non-perturbative superpotent...
['1997-06-02']
10,932
['eng']
['Mohayaee, R']
['The phases of two-dimensional QED and QCD']
['Particle Physics - Theory']
['talk, Havana 1997/03/24', 'quantum electrodynamics', 'gauge field theory, Yang-Mills', 'fermion', 'dimension, 2', 'field theory, massless', 'field theory, massive', 'critical phenomena', 'approximation, quasiclassical']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705243']
['The semi-classical phase structure of two-dimensional QED and QCD are briefly reviewed. The non-abelian theory is reformulated to closely resemble the Schwinger model. It is shown that, contrary to the abelian theory, the phase structure of two-dimensional QCD is unaffected by the structure of the theta vacuum. We ma...
['1997-06-02']
10,933
['eng']
['Pinsky, S S']
["The Analog of 't Hooft Pions with Adjoint Fermions"]
['Particle Physics - Theory']
['talk, Les Houches 1997/02/24', 'gauge field theory, SU(N)', 'dimension, 4', 'fermion', 'quantization', 'light cone gauge', 'Hamiltonian formalism', 'matrix model', 'dimension, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705242']
['In this paper we discuss a class of 1+1 dimensional matrix field theories in the light-cone Hamiltonian approach that are obtained from a dimensional reduction of 3+1 dimensional Yang-Mills theory. We present exact massless solutions of the boundstate integral equations in the large N limit. These massless states hav...
['1997-06-02']
10,934
['eng']
['Zwiebach, B']
['Oriented Open-Closed String Theory Revisited']
['Particle Physics - Theory']
['string model, open', 'string model, closed', 'membrane model, D-brane', 'background field', 'Riemann surfaces', 'moduli space', 'symmetry, transformation', 'algebra', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705241']
['String theory on D-brane backgrounds is open-closed string theory. Given the relevance of this fact, we give details and elaborate upon our earlier construction of oriented open-closed string field theory. In order to incorporate explicitly closed strings, the classical sector of this theory is open strings with a ho...
['1997-06-02']
10,935
['eng']
['Kogan, I I', 'Lewis, A']
['Origin of Logarithmic Operators in Conformal Field Theories']
['Particle Physics - Theory']
['field theory, conformal', 'dimension, 2', 'field theory, Liouville', 'gas, Coulomb', 'Wess-Zumino-Witten model, SL(2,R)', 'Wess-Zumino-Witten model, SU(2)', 'correlation function', 'operator product expansion', 'asymptotic behavior', 'algebra, Kac-Moody', 'algebra, Virasoro', 'operator']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705240']
["We study logarithmic operators in Coulomb gas models, and show that they occur when the ``puncture'' operator of the Liouville theory is included in the model. We also consider WZNW models for $SL(2,{\\cal R})$, and for SU(2) at level 0, in which we find logarithmic operators which form Jordan blocks for the Kac-Mood...
['1997-06-02']
10,936
['eng']
['Dabholkar, A', 'Mandal, G', 'Ramadevi, P']
['Nonrenormalization of Mass of Some Nonsupersymmetric String States']
['Particle Physics - Theory']
['string model', 'mass spectrum', 'operator, vertex', 'fluctuation', 'renormalization', 'black hole', 'entropy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705239']
['It is argued that the quantum correction to the mass of some very massive, nonsupersymmetric states vanishes in inverse proportion to their tree-level mass to all orders in string loops. This approximate nonrenormalization can explain the agreement between the perturbative degeneracy of these states and the Sen entro...
['1997-06-02']
10,937
['eng']
['Abe, M', 'Sato, M']
['Calabi-Yau manifolds constructed by K3 fibration with involution']
['Particle Physics - Theory']
['field theory, Kaehler', 'field theory, Calabi-Yau', 'geometry, algebra', 'string model', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705238']
['The method to construct the Calabi-Yau manifolds and their mirrors from K3 surfaces was developed by Borcea and Voisin. Using this method, some Calabi-Yau manifolds are constructed. We also investigate their applicability to string duality.']
['1997-06-02']
10,938
['eng']
['Minahan, J A', 'Nemeschansky, D D', 'Warner, N P']
['Investigating the BPS Spectrum of Non-Critical $E_n$ Strings']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'gauge field theory, E(N)', 'effective action', 'field theory, soliton', 'Wilson loop', 'geometry, algebra']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705237']
['We use the effective action of the $E_n$ non-critical strings to study its BPS spectrum for $0 \\le n \\le 8$. We show how to introduce mass parameters, or Wilson lines, into the effective action, and then perform the appropriate asymptotic expansions that yield the BPS spectrum. The result is the $E_n$ character exp...
['1997-05-30']
10,939
['eng']
['Bousso, R', 'Hawking, Stephen William']
['Trace Anomaly of Dilaton Coupled Scalars in Two Dimensions']
['Particle Physics - Theory']
['gravitation', 'field theory, conformal', 'dilaton', 'dimension, 2', 'anomaly', 'effective action', 'perturbation theory, higher-order', 'black hole']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705236']
['Conformal scalar fields coupled to the dilaton appear naturally in two-dimensional models of black hole evaporation. We calculate their trace anomaly. It follows that the RST counterterm appears naturally in the one-loop effective action.']
['1997-05-30']
10,940
['eng']
['Wheeler, J T']
['Quanta Without Quantization']
['Particle Physics - Theory']
['relativity theory, general', 'quantization', 'algebra, tensor', 'Hilbert space']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705235']
['The dimensional properties of fields in classical general relativity lead to a tangent tower structure which gives rise directly to quantum mechanical and quantum field theory structures without quantization. We derive all of the fundamental elements of quantum mechanics from the tangent tower structure, including fu...
['1997-05-30']
10,941
['eng']
['Parkhomenko, S E']
['Poisson-Lie T-duality and N=2 superconformal WZNW models on compact groups']
['Particle Physics - Theory']
['field theory, conformal', 'Wess-Zumino-Witten model', 'dimension, 2', 'supersymmetry', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705233']
["The supersymmetric generalization of Pisson-Lie T-duality in N=2 superconformal WZNW models on the compact groups is considered. It is shown that the role of Drinfeld's doubles play the complexifications of the corresponding compact groups. These complex doubles are used to define the natural actions of the isotropic...
['1997-05-30']
10,942
['eng']
['Brandhuber, A', 'Sonnenschein, J', 'Theisen, Stefan J', 'Yankielowicz, S']
['M Theory And Seiberg-Witten Curves']
['Particle Physics - Theory']
['field theory, M-theory', 'membrane model', 'supersymmetry', 'gauge field theory, SO(N)', 'gauge field theory, Sp(N)', 'symmetry breaking', 'geometry, algebra']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705232']
['We discuss N=2 supersymmetric Type IIA brane configurations within M theory. This is a generalization of the work of Witten to all classical groups.']
['1997-05-30']
10,943
['eng']
['Jizba, P']
['Heat Bath Particle Number Spectrum']
['Particle Physics - Theory']
['finite temperature', 'n-point function', 'Dyson-Schwinger equation', 'perturbation theory, higher-order']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705231']
['We calculate the number spectrum of particles radiated during a scattering into a heat bath using the thermal largest-time equation and the Dyson-Schwinger equation. We show how one can systematically calculate (d <N(ømega)>)/(dømega) to any order using modified real time finite-temperature diagrams. Our approach is ...
['1997-05-30']
10,944
['eng']
['Tiktopoulos, G']
['Variational Wave Functionals in Quantum Field Theory']
['Particle Physics - Theory']
['field theory, scalar', 'mathematical methods, variational', 'wave function', 'regularization', 'perturbation theory, higher-order', 'fermion', 'dimension, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705230']
['Variational (Rayleigh-Ritz) methods are applied to local quantum field theory. For scalar theories the wave functional is parametrized in the form of a superposition of Gaussians and the expectation value of the Hamiltonian is expressed in a form that can be minimized numerically. A scheme of successive refinements o...
['1997-05-30']
10,945
['eng']
['Marnelius, R']
['Time evolution in general gauge theories']
['Particle Physics - Theory']
['talk, Les Houches 1997/02/24', 'gauge field theory', 'Hamiltonian formalism', 'quantization, Batalin-Vilkovisky', 'invariance, Becchi-Rouet-Stora', 'time dependence']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705228']
['Talk at the International Workshop "New Non Perturbative Methods and Quantization on the Light Cone", Les Houches, France, Feb.24-March 7, 1997']
['1997-05-30']
10,946
['eng']
['Aschieri, Paolo']
['On the Geometry of the Quantum Poincaré Group']
['Particle Physics - Theory']
['talk, Buckow 1996/08/27', 'group theory, Poincare', 'quantum group, ISO(N)', 'differential forms']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705227']
['We review the construction of the multiparametric inhomogeneous orthogonal quantum group ISO_qr(N) as a projection from SO_qr(N+2), and recall the conjugation that for N=4 leads to the quantum Poincare group. We study the properties of the universal enveloping algebra U_qr(iso(N)), and give an R-matrix formulation. A...
['1997-05-30']
10,947
['eng']
['Gaillard, Mary Katherin', 'Zumino, B']
['Self-Duality in Nonlinear Electromagnetism']
['Particle Physics - Theory']
['electromagnetic field', 'matter', 'gauge field theory, U(1)', 'field theory, scalar', 'duality, transformation', 'Born-Infeld model']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705226']
['We discuss duality invariant interactions between electromagnetic fields and matter. The case of scalar fields is treated in some detail.']
['1997-05-29']
10,948
['eng']
['de Wit, B', 'Peeters, K', 'Plefka, J C']
['Supermembranes with Winding']
['Particle Physics - Theory']
['membrane model', 'supersymmetry, superfield', 'dimension, 11', 'light cone gauge', 'Hamiltonian formalism', 'field theory, soliton', 'mass spectrum']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705225']
['We study supermembranes in the light-cone gauge in eleven flat dimensions with compact directions. The membrane states are subject to only the central charges associated with closed two-branes, which, in this case, are generated by the winding itself. We present arguments why this winding leaves the mass spectrum con...
['1997-05-29']
10,949
['eng']
['Bazeia, D', 'Nascimento, J R S', 'Ribeiro, R F', 'Toledo, D']
['Soliton Stability in Systems of Two Real Scalar Fields']
['Particle Physics - Theory']
['field theory, scalar', 'dimension, 2', 'field theory, soliton', 'stability']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705224']
['In this paper we consider a class of systems of two coupled real scalar fields in bidimensional spacetime, with the main motivation of studying classical or linear stability of soliton solutions. Firstly, we present the class of systems and comment on the topological profile of soliton solutions one can find from the...
['1997-05-29']
10,950
['eng']
['Mann, R B']
['Charged Topological Black Hole Pair Creation']
['Particle Physics - Theory']
['black hole, topological', 'black hole, pair production', 'astrophysics, fundamental constant', 'space-time, singularity', 'space-time, horizon', 'domain wall', 'instanton', 'field theory, action', 'black hole, anti-de Sitter']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705223']
['I examine the pair creation of black holes in spacetimes with a cosmological constant of either sign. I consider cosmological C-metrics and show that the conical singularities in this metric vanish only for three distinct classes of black hole metric, two of which have compact event horizons on each spatial slice. On...
['1997-05-29']
10,951
['eng']
['Pelka, R']
['Backreaction of excitations on a domain wall']
['Particle Physics - Theory']
['domain wall, radiation', 'excited state, back reaction', 'field theory, scalar']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705222']
['Backreaction of excitations on a planar domain wall in a real scalar field model is investigated in the cases of homogeneous, plane wave and wave packet type excitations. It is found that the excited domain wall radiates. The method of calculating backreaction for the general forms of excitations is also presented.']
['1997-05-29']
10,952
['eng']
['Seiberg, N']
['Matrix Description of M-theory on $T^5$ and $T^5/Z_2$']
['Particle Physics - Theory']
['field theory, M-theory', 'membrane model, p-brane', 'field theory, torus', 'dimension, 6', 'supersymmetry, charge', 'spontaneous compactification', 'matrix model']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705221']
['We present four infinite series of new quantum theories with super-Poincare symmetry in six dimensions, which are not local quantum field theories. They have string like excitations but the string coupling is of order one. Compactifying these theories on $T^5$ we find a Matrix theory description of M theory on $T^5$ ...
['1997-05-29']
10,953
['eng']
['Hori, K', 'Ooguri, H', 'Vafa, C']
['Non-Abelian Conifold Transitions and N=4 Dualities in Three Dimensions']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'Higgs model', 'symmetry, spontaneously broken', 'duality', 'dimension, 3', 'spontaneous compactification', 'field theory, Calabi-Yau', 'geometry, algebra', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705220']
['We show how Higgs mechanism for non-abelian N=2 gauge theories in four dimensions is geometrically realized in the context of type II strings as transitions among compactifications of Calabi-Yau threefolds. We use this result and T-duality of a further compacitification on a circle to derive N=4, d=3 dual field theor...
['1997-05-29']
10,954
['eng']
['Babansky, A Y', 'Gorbar, E V', 'Shchepanyuk, G V']
['Chiral Symmetry Breaking in the Nambu-Jona-Lasinio Model in External Constant Electromagnetic Field']
['Particle Physics - Theory']
['Jona-Lasinio-Nambu model', 'symmetry breaking, chiral', 'electromagnetic field, external field', 'dimension, 3', 'dimension, 4', 'coupling constant, angular dependence', 'invariance, Lorentz', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705218']
['Dynamical chiral symmetry breaking is studied in the Nambu-Jona-Lasinio model for an arbitrary combination of external constant electric and magnetic fields in 3+1 and 2+1 dimensions. In 3+1 dimensions the case $\\vec{E}\\cdot\\vec{H} \\ne 0$ is studied. It is shown that the critical coupling constant decreases with ...
['1997-05-29']
10,955
['eng']
['Cavalcante, F S A', 'Almeida, C A S']
['Vortices in a nonminimal Maxwell-Chern-Simons O(3) $\\sigma$ Model']
['Particle Physics - Theory']
['sigma model, nonlinear', 'symmetry, O(3)', 'gauge field theory, U(1)', 'Chern-Simons term', 'dimension, 3', 'field equations, vortex', 'field equations, soliton', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705217']
["In this work we considerer an Abelian O(3) sigma model coupled nonminimally with a gauge field governed by a Maxwell and Chern-Simons terms. Self-dual soliton solutions are obtained for a specific form of the potential and for a critical value of the nonminimal coupling constant. Also, the model admits both topologic...
['1997-05-29']
10,956
['eng']
['Aste, A', 'Dütsch, M', 'Scharf, G']
['On Gauge Invariance and Spontaneous Symmetry Breaking']
['Particle Physics - Theory']
['gauge field theory, U(1)', 'Higgs model', 'S-matrix', 'perturbation theory', 'invariance, gauge', 'symmetry, spontaneously broken']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705216']
['We show how the widely used concept of spontaneous symmetry breaking can be explained in causal perturbation theory by introducing a perturbative version of quantum gauge invariance. Perturbative gauge invariance, formulated exclusively by means of asymptotic fields, is discussed for the simple example of Abelian U(1...
['1997-05-29']
10,957
['eng']
['Dhar, A']
['The emergence of space-time gravitational physics as an effective theory from the c=1 matrix model']
['Particle Physics - Theory']
['matrix model', 'central charge, 1', 'moduli space', 'fluctuation', 'field theory, tachyon', 'black hole', 'string model', 'dimension, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705215']
['We discuss further a recent space-time interpretation of the $c=1$ matrix model which retains both sides of the inverted harmonic oscillator potential in the underlying free fermion theory and reproduces the physics of the discrete state moduli of two-dimensional string theory. We show that within this framework the ...
['1997-05-29']
10,958
['eng']
['Teschner, J A']
['On the conformal bootstrap for SL(2,R)-WZNW models']
['Particle Physics - Theory']
['field theory, conformal', 'Wess-Zumino-Witten model', 'dimension, 2', 'symmetry, SL(2,R)', 'group theory, representation', 'correlation function', 'Clebsch-Gordan coefficients', 'analytic properties']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705214']
['Quantization of the SL(2,R)-WZNW model will be discussed from the point of view of the conformal bootstrap. Conformal blocks are defined from representations of affine sl(2) that are neither of highest nor lowest weight type. The general expression for the structure constants resp. three point functions is derived. S...
['1997-05-29']
10,959
['eng']
['Cho, Y M', 'Kimm, K']
['Electroweak Monopoles']
['Particle Physics - Theory']
['Salam-Weinberg model', 'field equations, monopole', 'field equations, dyon', 'boundary condition', 'regularization', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705213']
['We present finite energy analytic monopole and dyon solutions whose size is fixed by the electroweak scale. Our result shows that genuine electroweak monopole and dyon could exist whose mass scale is much smaller than the grand unification scale.']
['1997-05-29']
10,960
['eng']
['Sen, A']
['Kaluza-Klein Dyons in String Theory']
['Particle Physics - Theory']
['string model, heterotic', 'spontaneous compactification, torus', 'dimension, 6', 'Kaluza-Klein model, dyon', 'Kaluza-Klein model, monopole']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705212']
['S-duality of hetertotic / type II string theory compactified on a six dimensional torus requires the existence of Kaluza-Klein dyons, carrying winding charge. We identify the zero modes of the Kaluza-Klein monopole solution which are responsible for these dyonic excitations, and show that we get the correct degenerac...
['1997-05-29']
10,961
['eng']
['Steinacker, H']
['Quantum Groups, Roots of Unity and Particles on quantized Anti-de Sitter Space']
['Particle Physics - Theory']
['thesis', 'space-time, anti-de Sitter', 'quantum group, representation', 'quantum space', 'algebra, Hopf', 'operator, Becchi-Rouet-Stora', 'operator, algebra', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705211']
['Quantum groups in general and the quantum Anti-de Sitter group $U_q(so(2,3))$ in particular are studied from the point of view of quantum field theory. We show that if $q$ is a suitable root of unity, there exist finite-dimensional, unitary representations corresponding to essentially all the classical one-particle r...
['1997-05-29']
10,962
['eng']
['Sharpe, E']
['Extremal Transitions in Heterotic String Theory']
['Particle Physics - Theory']
['string model, heterotic', 'spontaneous compactification', 'fibre bundle, transformation', 'geometry, algebra', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705210']
['In this paper we study extremal transitions between heterotic string compactifications, i.e., transitions between pairs (M,V) where M is a Calabi-Yau manifold and V a gauge bundle. Bundle transitions are described using language recently espoused by Friedman, Morgan, Witten. In addition, partly as a check on our meth...
['1997-05-28']
10,963
['eng']
['Satoh, Y']
['Study of Three Dimensional Quantum Black Holes']
['Particle Physics - Theory']
['thesis', 'black hole', 'dimension, 3', 'field theory, scalar', 'thermodynamics', 'string model', 'propagator', 'entropy', 'regularization, dependence', 'dependence, boundary condition', 'Wess-Zumino-Witten model, SL(2,R)', 'spectra, string', 'ghost', 'unitarity, tachyon', 'geometry', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705209']
['We investigate quantum aspects of the three dimensional (BTZ) black holes. The discussions are devoted to two subjects: the thermodynamics of quantum scalar fields and the string theory in the three dimensional black hole backgrounds. We take two approaches to the thermodynamics. In one approach we use mode expansion...
['1997-05-28']
10,964
['eng']
['Satoh, Y']
['Ghost-free and Modular Invariant Spectra of a String in SL(2,R) and Three Dimensional Black Hole Geometry']
['Particle Physics - Theory']
['black hole', 'dimension, 3', 'Wess-Zumino-Witten model, SL(2,R)', 'spectra, string', 'invariance, modular', 'partition function', 'ghost']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705208']
["Spectra of a string in $ SL(2,R) $ and three dimensional (BTZ) black hole geometry are discussed. We consider a free field realization of ^sl (2,R) different from the standard ones in treatment of zero-modes. Applying this to the string model in SL(2,R), we show that the spectrum is ghost-free. The essence of the arg...
['1997-05-28']
10,965
['eng']
['Frolov, V P', 'Fursaev, D V']
['Plenty of Nothing']
['Particle Physics - Theory']
['space-time', 'field theory, scalar', 'gravitation, induced', 'black hole', 'entropy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705207']
["We demonstrate how Sakharov's idea of induced gravity allows one to explain the statistical-mechanical origin of the entropy of a black hole. According to this idea, gravity becomes dynamical as the result of quantum effects in the system of heavy constituents of the underlying theory. The black hole entropy is relat...
['1997-05-28']
10,966
['eng']
['Bars, Itzhak', 'Kounnas, Costas']
['String and Particle with Two Times']
['Particle Physics - Theory']
['particle, relativistic', 'string model', 'dimension, >4', 'quantization', 'Hamiltonian formalism', 'operator, Becchi-Rouet-Stora', 'light cone gauge', 'membrane model, p-brane']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705205']
['An action for a string and a particle with two timelike dimensions is proposed and analyzed. Due to new gauge symmetries and associated constraints, the motion of each system in the background of the other is equivalent to effective motion with a single timelike dimension. The quantum constraints are consistent only ...
['1997-05-28']
10,967
['eng']
['Dabrowski, L', 'Nesti, F', 'Siniscalco, P']
['A Finite Quantum Symmetry of M(3,C)']
['Particle Physics - Theory']
['quantum group', 'algebra, Hopf', 'dimension, 27', 'algebra, representation', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705204']
["The 27-dimensional Hopf algebra A(F), defined by the exact sequence of quantum groups A(SL(2,C))->A(SL_q(2))->A(F), q^3=1, is studied as a finite quantum group symmetry of the matrix algebra M(3,C), describing the color sector of Alain Connes' formulation of the Standard Model. The duality with the Hopf algebra H,inv...
['1997-05-28']
10,968
['eng']
['Amorim, R', 'Thibes, R']
['Possible quantum obstructions to the process of Abelian conversion']
['Particle Physics - Theory']
['quantization, constraint', 'Hamiltonian formalism', 'transformation, gauge', 'transformation, constraint', 'path integral']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705203']
['The procedure for Abelian conversion of second class constraints due to Batalin, Fradkin, Fradkina and Tyutin is considered at quantum level, by using the field-antifield formalism. It is argued that quantum effects can obstruct the process. In this case, Wess-Zumino fields may be introduced in order to restore the l...
['1997-05-28']
10,969
['eng']
['Ambjørn, Jan', 'Kristjansen, C F', 'Watabiki, Y']
['The Two-point Function of c=-2 Matter Coupled to 2D Quantum Gravity']
['Particle Physics - Theory']
['quantum gravity', 'dimension, 2', 'coupling, matter', 'field theory, string', 'lattice field theory', 'central charge, -2', 'two-point function', 'transfer matrix', 'critical phenomena', 'invariance, reparametrization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705202']
["We construct a reparametrization invariant two-point function for c=-2 conformal matter coupled to two-dimensional quantum gravity. From the two-point function we extract the critical indices \\nu and \\eta. The results support the quantum gravity version of Fisher's scaling relation. Our approach is based on the tra...
['1997-05-28']
10,970
['eng']
['Lindström, U', 'Zabzine, M']
['The topology of multi-coupling deformations of CFT']
['Particle Physics - Theory']
['field theory, conformal', 'dimension, 2', 'field theory, deformation', 'topology', 'renormalization group, c-function', 'correlation function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705201']
['We discuss the topological properties of the manifold of coupling constants for multi-coupling deformations of conformal field theories. We calculate the Euler and Betti numbers and briefly discuss physical applications of these results.']
['1997-05-28']
10,971
['eng']
['McArthur, I N', 'Gargett, T D']
['A "Gaussian" Approach to Computing Supersymmetric Effective Actions']
['Particle Physics - Theory']
['field theory, scalar', 'gauge field theory, background field', 'supersymmetry, superspace', 'effective action', 'regularization, zeta function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705200']
['For nonsupersymmetric theories, the one-loop effective action can be computed via zeta function regularization in terms of the functional trace of the heat kernel associated with the operator which appears in the quadratic part of the action. A method is developed for computing this functional trace by exploiting its...
['1997-05-28']
10,972
['eng']
['Landsteiner, K', 'López, E', 'Lowe, D A']
['N=2 Supersymmetric Gauge Theories, Branes and Orientifolds']
['Particle Physics - Theory']
['gauge field theory, SO(N)', 'gauge field theory, Sp(N)', 'string model', 'supersymmetry', 'membrane model, p-brane', 'field theory, orbifold', 'geometry, algebra']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705199']
['Starting with configurations of fourbranes, fivebranes, sixbranes and orientifolds in Type IIA string theory we derive via M-theory the curves solving N=2 supersymmetric gauge theories with gauge groups SO(N) and Sp(2N). We also obtain new curves describing theories with product gauge groups. A crucial role in the di...
['1997-05-27']
10,973
['eng']
['Dilkes, F A', 'McKeon, D G C', 'Nguyen, K']
['The Yukawa Coupling in Three Dimensions']
['Particle Physics - Theory']
['field theory, scalar', 'fermion', 'coupling, Yukawa', 'dimension, 3', 'renormalization group', 'perturbation theory, higher-order']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705198']
['We consider several renormalizable, scale free models in three space-time dimensions which involve scalar and spinor fields. The Yukawa couplings are bilinear in both the spinor and scalar fields and the potential is of sixth order in the scalar field. In a model with a single scalar field and a complex Fermion field...
['1997-05-27']
10,974
['eng']
['Curio, G']
['Chiral Multiplets in N=1 Dual String Pairs']
['Particle Physics - Theory']
['string model, heterotic', 'vacuum state', 'multiplet, chiral', 'fibre bundle, E(8) x E(8)', 'field theory, Calabi-Yau', 'field theory, F-theory']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705197']
['We compare the spectrum of chiral multiplets in the N=1 vacua of the heterotic string on a Calabi-Yau together with an $E_8\\times E_8$ vector bundle and F-theory on a smooth Calabi-Yau fourfold. Under suitable restrictions we show agreement using an index-computation.']
['1997-05-27']
10,975
['eng']
['Mukherjee, P']
['Magnetic Vortices in a Gauged O(3) $\\sigma$ Model with Symmetry Breaking Self-Interaction']
['Particle Physics - Theory']
['sigma model, nonlinear', 'symmetry, O(3)', 'dimension, 3', 'field equations, vortex']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705196']
['We consider a (2+1) dimensional nonlinear O(3) sigma model with its U(1) subgroup gauged along with the inclusion of a self-interaction having symmetry breaking minima.The gauge field dynamics is governed by the Maxwell term.The model is shown to support topologically stable purely magnetic self-dual vortices.']
['1997-05-27']
10,976
['eng']
['Kokado, A', 'Konisi, G', 'Saitô, T', 'Tada, Y']
['Scalar-Tensor Theory of Gravity on $M_{4} x Z_{2}$ Geometry']
['Particle Physics - Theory']
['Brans-Dicke model', 'space-time, M(4) x Z(2)', 'torsion', 'differential geometry, noncommutative']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705195']
['In the Brans-Dicke(BD) theory on $M_{4}\\times Z_{2}$ geometry the geometrical meaning of the torsion is clarified. The BD theory on $M_{4}\\times Z_{2}$ is rederived by taking into account of a new isometry condition.']
['1997-05-27']
10,977
['eng']
['Polyakov, D G']
['Ghost Number Cohomologies and M-theory Quantum States']
['Particle Physics - Theory']
['field theory, M-theory', 'membrane model', 'supersymmetry', 'dimension, 11', 'algebra, Becchi-Rouet-Stora', 'cohomology', 'ghost', 'matrix model']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705194']
['We review and develop the formalism of ghost number cohomologies, outlined in our previous work, to classify the quantum states of M-theory. We apply this formalism to the matrix formulation of M-theory to obtain NSR superstring action from dimensionally reduced matrix model. The BPS condition of the matrix theory is...
['1997-05-27']
10,978
['eng']
['Kaloper, N', 'Meissner, K A']
['Duality Beyond the First Loop']
['Particle Physics - Theory']
['string model', 'sigma model, nonlinear', 'perturbation theory, higher-order', 'higher-order, 2', 'effective action', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705193']
["In this article we give a calculation of the two-loop $\\si$-model corrections to the T-duality map in string theory. We use the effective action approach, and analyze two-loop corrections in a specific subtraction scheme. Focusing on backgrounds which have a single Abelian isometry, we find the explicit form for the...
['1997-05-27']
10,979
['eng']
['Cvetic, M', 'Larsen, F']
['General Rotating Black Holes in String Theory']
['Particle Physics - Theory']
['field theory, scalar', 'finite temperature', 'space-time', 'dimension, 5', 'thermodynamics', 'entropy', 'field equations, solution']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705192']
['We derive the wave equation for a minimally coupled scalar field in the background of a general rotating five-dimensional black hole. It is written in a form that involves two types of thermodynamic variables, defined at the inner and outer event horizon, respectively. We model the microscopic structure as an effecti...
['1997-05-27']
10,980
['eng']
['Kalmykov, M Yu', 'Kazakov, D I']
['On calculation of the off-shell renormalization functions in the $R^2$ gravity']
['Particle Physics - Theory']
['quantum gravity, action', 'derivative, high', 'renormalization group', 'perturbation theory, higher-order']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705191']
['A new way how to calculate the off-shell renormalization functions within the $R^2$-gravity has been proposed. The one-loop renormalization group equations in the approach suggested have been constructed. The behaviour of effective potential for an massless scalar field interacting with the quantum gravitational fiel...
['1997-05-27']
10,981
['eng']
['Banks, T', 'Fischler, Willy', 'Seiberg, N', 'Susskind, Leonard']
['Instantons, Scale Invariance and Lorentz Invariance in Matrix Theory']
['Particle Physics - Theory']
['matrix model', 'invariance, Lorentz', 'invariance, conformal', 'instanton', 'spontaneous compactification, torus', 'scattering, graviton', 'gauge field theory, Yang-Mills', 'dimension, 3']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705190']
['In this paper we consider features of graviton scattering in Matrix theory compactified on a 2-torus. The features which interest us can only be determined by nonperturbative effects in the corresponding 2+1 dimensional super Yang Mills theory. We show that the superconformal symmetry of strongly coupled Super Yang M...
['1997-05-27']
10,982
['eng']
['Arkani-Hamed, N', 'Murayama, H']
['Renormalization Group Invariance of Exact Results in Supersymmetric Gauge Theories']
['Particle Physics - Theory']
['gauge field theory, Sp(N)', 'fermion, flavor', 'supersymmetry', 'renormalization group', 'perturbation theory, higher-order', 'quantum space, moduli space']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705189']
['We clarify the notion of Wilsonian renormalization group (RG) invariance in supersymmetric gauge theories, which states that the low-energy physics can be kept fixed when one changes the ultraviolet cutoff, provided appropriate changes are made to the bare coupling constants in the Lagrangian. We first pose a puzzle ...
['1997-05-27']
10,983
['eng']
['Saradzhev, F M']
['Generalised chiral $QED_{2}']
['Particle Physics - Theory']
['quantum electrodynamics', 'dimension, 2', 'quantization, canonical', 'Schwinger model, chiral', 'Gauss law', 'anomaly', 'electric field, background', 'Hamiltonian formalism, constraint', 'algebra, Poincare', 'Berry phase', 'statistics, exotic', 'Schwinger terms', 'charge, screening']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705178']
['We study the influence of the anomaly on the physical quantum picture of the generalized chiral Schwinger model defined on the circle. We show that the anomaly i) results in the background linearly rising electric field and ii) makes the spectrum of the physical Hamiltonian nonrelativistic without a massive boson. Th...
['1997-05-26']
10,984
['eng']
['Müller, R']
['Decay of accelerated particles']
['Particle Physics - Theory']
['muon-, leptonic decay', 'pi-, leptonic decay', 'p, semileptonic decay', 'width, momentum dependence', 'particle, acceleration', 'field theoretical model, scalar', 'effective Lagrangian', 'two-point function', 'numerical calculations', 'muon- --> electron neutrino/mu antineutrino/e', 'pi- --> muon- antineutrino/mu', '...
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9706016']
['We study how the decay properties of particles are changed by acceleration. It is shown that under the influence of acceleration (1) the lifetime of particles is modified and (2) new processes (like the decay of the proton) become possible. This is illustrated by considering scalar models for the decay of muons, pion...
['1997-06-05']
10,985
['eng']
['Ganor, O J', 'Gopakumar, R', 'Ramgoolam, S']
['Higher Loop Effects in M(atrix) Orbifolds']
['Particle Physics - Theory']
['matrix model', 'field theory, M-theory', 'field theory, orbifold', 'membrane model, p-brane', 'p-brane, 0', 'scattering', 'perturbation theory, higher-order']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705188']
['Scattering of zero branes off the fixed point in $R^8/Z_2$, as described by a super-quantum mechanics with eight supercharges, displays some novel effects relevant to Matrix theory in non-compact backgrounds. The leading long distance behaviour of the moduli space metric receives no correction at one loop in Matrix t...
['1997-05-26']
10,986
['eng']
['Doikou, A', 'Mezincescu, L', 'Nepomechie, R I']
['Simplified Calculation of Boundary S Matrices']
['Particle Physics - Theory']
['statistical mechanics', 'ferromagnet', 'model, Heisenberg', 'S-matrix', 'boundary condition']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705187']
['The antiferromagnetic Heisenberg spin chain with N spins has a sector with N=odd, in which the number of excitations is odd. In particular, there is a state with a single one-particle excitation. We exploit this fact to give a simplified derivation of the boundary S matrix for the open antiferromagnetic spin-1/2 Heis...
['1997-05-26']
10,987
['eng']
['Schaposnik, F A']
['Bosonization in d > 2 dimensions']
['Particle Physics - Theory']
['talk, La Plata 1997/04/28', 'fermion', 'gauge field theory, Yang-Mills', 'bosonization, abelian', 'bosonization, nonabelian', 'transformation, Becchi-Rouet-Stora', 'Wilson loop']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705186']
['I discuss in this talk a bosonization approach recently developed. It leads to the (exact) bosonization rule for fermion currents in d > 2 dimensions and also provides a systematic way of constructing the bosonic action in different regimes.']
['1997-05-26']
10,988
['eng']
['Meana, M L', 'Osorio, M A R', 'Peñalba, J P']
['Counting Closed String States in a Box']
['Particle Physics - Theory']
['string model, closed', 'string, gas', 'phase space, density', 'astrophysics', 'thermodynamics', 'entropy', 'pressure', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705185']
['The computation of the microcanonical density of states for a string gas in a finite volume needs a one by one count because of the discrete nature of the spectrum. We present a way to do it using geometrical arguments in phase space. We take advantage of this result in order to obtain the thermodynamical magnitudes ...
['1997-05-26']
10,989
['eng']
['Ioannidou, T A']
['Soliton Dynamics in a Novel Discrete O(3) $\\sigma$ Model in (2+1) Dimensions']
['Particle Physics - Theory']
['sigma model, nonlinear', 'dimension, 3', 'symmetry, O(3)', 'energy, lower limit', 'field equations, soliton', 'lattice field theory', 'perturbation theory', 'stability']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705184']
["The O(3) sigma model in two spatial dimensions admits topological (Bogomol'nyi) lower bound on its energy. This paper proposes a lattice version of this system which maintains the Bogomol'nyi bound and allows the explicit construction of static solitons on the lattice. Numerical simulations show that these lattice so...
['1997-05-26']
10,990
['eng']
['Tsutsui, I', 'Tanimura, S', 'Kobayashi, H']
['Quantum Mechanically Induced Hopf Term in the O(3) Nonlinear $\\sigma$ Model']
['Particle Physics - Theory']
['sigma model, nonlinear', 'dimension, 3', 'charge, topological', 'field theory, induced', 'spin, statistics', 'spin, fractional', 'coset space', 'quantization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705183']
['The Hopf term in the $2 + 1$ dimensional O(3) nonlinear sigma model, which is known to be responsible for fractional spin and statistics, is re-examined from the viewpoint of quantization ambiguity. It is confirmed that the Hopf term can be understood as a term induced quantum mechanically, in precisely the same mann...
['1997-05-26']
10,991
['eng']
['Shah, I', 'Thomas, S']
['Finite Soft Terms in String Compactifications with Broken Supersymmetry']
['Particle Physics - Theory']
['string model, heterotic', 'spontaneous compactification', 'effective action', 'supersymmetry, symmetry breaking', 'mass spectrum']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705182']
['We consider the role of supersymmetry breaking soft terms that are present in generalized Narain compactifications of heterotic string theory, in which local supersymmetry is spontaneously broken, with gravitino masses being inversely proportional to the radii of compact dimensions. Such compactifications and their v...
['1997-05-26']
10,992
['eng']
['Yung, A V']
['Higher Derivative Terms in the Effective Action of N=2 SUSY QCD from Instantons']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'supersymmetry', 'fermion, flavor', 'effective action', 'derivative, high']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705181']
['We consider N=2 SUSY QCD with gauge group SU(2) and $N_{f}$ flavours of matter with nonzero mass. Using the method of the instanton-induced effective vertex we calculate higher derivative corrections to the Seiberg-Witten result in the momentum expansion of the low energy effective Lagrangian in various regions of th...
['1997-05-26']
10,993
['eng']
['Cabra, D C', 'Honecker, A', 'Mussardo, G', 'Pujol, P']
['A Non-Perturbative Approach to the Random-Bond Ising Model']
['Particle Physics - Theory']
['Ising model', 'continuum limit', 'Gross-Neveu model, O(N)', 'form factor, massless', 'energy, operator', 'correlation function', 'fixed point, nonperturbative', 'S-matrix', 'Wess-Zumino-Witten model', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705180']
['We study the N -> 0 limit of the O(N) Gross-Neveu model in the framework of the massless form-factor approach. This model is related to the continuum limit of the Ising model with random bonds via the replica method. We discuss how this method may be useful in calculating correlation functions of physical operators. ...
['1997-05-26']
10,994
['eng']
['Kleihaus, B', 'Kunz, J', 'Sood, A K']
['Charged SU(N) Einstein-Yang-Mills Black Holes']
['Particle Physics - Theory']
['relativity theory, general', 'gauge field theory, SU(N)', 'Einstein equation, solution', 'black hole', 'charge']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705179']
['We consider asymptotically flat static spherically symmetric black hole solutions in SU(N) EYM theory. Charged EYM black hole solutions are obtained when one or several of the $N-1$ gauge field functions are identically zero. We classify the possible types of these black hole solutions with respect to their group str...
['1997-05-26']
10,995
['eng']
['Mukherjee, K']
['Gap equation in scalar field theory at finite temperature']
['Particle Physics - Theory']
['phi**n model, 4', 'finite temperature', 'mass spectrum', 'perturbation theory, higher-order', 'higher-order, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705177']
['We investigate the two-loop gap equation for the thermal mass of hot massless $g^2\\phi^4$ theory and find that the gap equation itself has an imaginary part which along with the finite terms contains divergent pieces too. This indicates that it is not possible to find the real finite thermal mass as a solution of th...
['1997-05-26']
10,996
['eng']
['Samuel, S']
['An Approximate Large $N$ Method for Lattice Chiral Models']
['Particle Physics - Theory']
['gauge field theory, U(N)', 'lattice field theory, chiral', 'approximation', 'Dyson-Schwinger equation, solution', 'two-point function', 'critical phenomena', 'expansion 1/N', 'mass, gap', 'dimension, < =2', 'dimension, >2', 'strong coupling', 'weak coupling', 'numerical calculations, Monte Carlo']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9709195']
['An approximation is used that permits one to explicitly solve the two-point Schwinger-Dyson equations of the U(N) lattice chiral models. The approximate solution correctly predicts a phase transition for dimensions $d$ greater than two. For $d \\le 2 $, the system is in a single disordered phase with a mass gap. The ...
['1997-09-29']
10,997
['eng']
['Fadeev, L', 'Niemi, Antti J']
['Toroidal Configurations As Stable Solitons']
['Particle Physics - Theory']
['soliton, torus', 'knot theory', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705176']
['Previously we have proposed that in certain relativistic quantum field theories knotlike configurations may appear as stable solitons. Here we present a detailed investigation of the simplest knotted soliton, the torus-shaped unknot.']
['1997-05-23']
10,998
['eng']
['Berkooz, M', 'Rozali, M']
['String Dualities from Matrix Theory']
['Particle Physics - Theory']
['field theory, M-theory', 'field theory, Kaehler', 'matrix model', 'string model, heterotic', 'spontaneous compactification', 'dimension, 6', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705175']
['We suggest that the (2,0) six dimensional field theory compactified on $S^1\\times K3$ is the Matrix model description of both M-theory on $K3$ and the Heterotic string on $T^3$. This proposal is different from existing proposals for the Heterotic theory. Different limits of the base space geometry give the different...
['1997-05-23']
10,999
['eng']
['Andreas, B', 'Curio, G', 'Lüst, Dieter']
['N=1 Dual String Pairs and their Massless Spectra']
['Particle Physics - Theory']
['field theory, F-theory', 'string model, heterotic', 'duality', 'particle, multiplet', 'particle, massless', 'geometry, algebra']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9705174']
['We construct two chains of fourdimensional F-theory/heterotic dual string pairs with N=1 supersymmetry. On the F-theory side as well as on the heterotic side the geometry of the involved manifolds relies on del Pezzo surfaces. We match the massless spectra by using, for one chain of models, an index formula to count ...
['1997-05-23']