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14
14,000
['eng']
['Kumar, A', 'Sen-Gupta, G']
['K-models and type IIB superstring backgrounds']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'background field', 'field theory, M-theory', 'symmetry, SL(2,R)', 'geometry']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602145']
['A family of type IIB superstring backgrounds involving Ramond-Ramond fields are obtained in ten dimensions starting from a K-model through a generalization of our recent results. The unbroken global SL(2,R) symmetry of the type IIB equations of motion are implemented in this context as a solution generating transfrom...
['1996-02-28']
14,001
['eng']
['Kumar, A', 'Ray, K']
['M-theory on orientifolds of K$_{3}$ x S$^{1}$']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'spontaneous compactification', 'geometry, algebra', 'M-theory']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602144']
['We present several Orientifolds of M-Theory on K_3\\times S^1 by additional projections with respect to the finite abelian automorphism groups of K_3. The resulting models correspond to anomaly free theories in six dimensions. We construct explicit examples which can be interpreted as models with eight, four, two and...
['1996-02-28']
14,002
['eng']
['Hamada, K J']
['W$_{\\infty}$ structures of 2D string theory']
['Particle Physics - Theory']
['talk, Osaka 1995/12/14', 'string model', 'dimension, 2', 'invariance, W(infinity)', 'background field, tachyon', 'scattering amplitude', 'Ward identity', 'phase space']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602150']
["The Ward identities of the W_{\\infty} symmetry in 2D string theory in the tachyon background are studied in the continuum approach. Comparing the solutions with the matrix model results, it is verified that 2D string amplitudes are different from the matrix model amplitudes only by the external leg factors even in h...
['1996-03-08']
14,003
['eng']
['Gitman, D M', 'Gon, A E', 'Tyutin, I V']
['Remark to the comment on "New pseudoclassical model for Weyl particles"']
['Particle Physics - Theory']
['particle, Weyl', 'model, quasiclassical', 'quantization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602151']
['We present here our considerations concerning the problem of classical consistency of pseudoclassical models touched upon in a recent comment on our paper "New pseudoclassical model for Weyl particle".']
['1996-02-28']
14,004
['eng']
['Moritsch, O', 'Schweda, Manfred', 'Sommer, T']
['The Yang-Mills gauge field theory in the context of a generalized BRST-formalism including translations']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'path integral', 'algebra, translation', 'algebra, Becchi-Rouet-Stora', 'cohomology', 'ghost', 'renormalization, algebra', 'Slavnov identity', 'anomaly']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602152']
["We discuss the algebraic renormalization of the Yang--Mills gauge field theory in the presence of translations. Due to the translations the algebra between Sorella's \\d--operator, the exterior derivative and the BRST--operator closes. Therefore, we are able to derive an integrated parameter formula collecting in an ...
['1996-02-28']
14,005
['eng']
['Khuri, R R']
['Strings from membranes and fivebranes']
['Particle Physics - Theory']
['talk, Geneva 1995/11/27', 'membrane model, p-brane', 'p-brane, 5', 'string model, heterotic', 'dimension, 6', 'field theory, soliton', 'duality, transformation']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602153']
['Under the six-dimensional heterotic/type IIA duality map, a solitonic membrane solution of heterotic string theory transforms into a singular solution of type IIA theory, and should therefore be interpreted as a fundamental membrane in the latter theory. This finding pointed to a gap in the formulation of string theo...
['1996-02-28']
14,006
['eng']
['Karabali, Dimitra', 'Nair, V P']
['On the origin of the mass gap for non-abelian gauge theories in (2+1) dimensions']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'dimension, 3', 'Hamiltonian formalism', 'mass spectrum']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602155']
['An analysis of how the mass gap could arise in pure Yang-Mills theories in two spatial dimensions is given']
['1996-02-28']
14,007
['eng']
["D'Attanasio, M", 'Morris, T R']
['Gauge invariance, the quantum action principle, and the renormalization group']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'renormalization group, transformation', 'invariance, gauge', 'Ward identity']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602156']
['If the Wilsonian renormalization group (RG) is formulated with a cutoff that breaks gauge invariance, then gauge invariance may be recovered only once the cutoff is removed and only once a set of effective Ward identities is imposed. We show that an effective Quantum Action Principle can be formulated in perturbation...
['1996-02-28']
14,008
['eng']
['Gamboa-Rios, J']
['Quantum mechanics on multiply connected manifolds with applications to one and two dimensional anyons']
['Particle Physics - Theory']
['talk, Puebla 1995/10/29', 'quantum mechanics', 'path integral', 'topology, effect', 'postulated particle, anyon', 'dimension, 1', 'dimension, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602158']
['In these lectures several aspects of anyon in one and two dimensions are considered from the path integral formalism. This paper is based in a set of four lectures given by the author in the "V Latinoamerican Workshop of Particles and Fields, hel in Puebla, Mexico.']
['1996-02-28']
14,009
['eng']
['Cornwall, J M']
['On the phase transition in D=3 Yang-Mills Chern-Simons gauge theory']
['Particle Physics - Theory']
['gauge field theory, SU(N)', 'dimension, 3', 'Chern-Simons term', 'critical phenomena', 'perturbation theory, higher-order', 'partition function', 'n-point function', 'Wilson loop', 'soliton', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602157']
["SU(N) Yang-Mills theory in three dimensions, with a Chern-Simons term of level k (an integer) added, has two dimensionful coupling constants, g^2 k and g^2 N; its possible phases depend on the size of k relative to N. For k \\gg N, this theory approaches topological Chern-Simons theory with no Yang-Mills term, and ex...
['1996-02-28']
14,010
['eng']
['Lee, C Y']
['Noncommutative geometric gauge theory from superconnections']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'differential geometry, noncommutative', 'Higgs model', 'unified field theory']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602159']
['Noncommutative geometric gauge theory is reconstructed based on the superconnection concept. The bosonic action of the Connes-Lott model including the symmetry breaking Higgs sector is obtained by using a new generalized derivative, which consists of the usual 1-form exterior derivative plus an extra element called {...
['1996-02-28']
14,011
['eng']
['Araki, M', 'Tanii, Y']
['Ward-Takahashi identities in large N field theories']
['Particle Physics - Theory']
['path integral', 'expansion 1/N', 'Ward identity']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602141']
['The Ward-Takahashi identities in large N field theories are expressed in a simple form using master fields. Operators appearing in these expressions are found to be generators of symmetry transformations acting on the master fields.']
['1996-02-27']
14,012
['eng']
['Islam, M M', 'Puglia, S J']
['Anomalous chiral action from the path-integral']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'fermion', 'path integral, determinant', 'anomaly', 'regularization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602137']
["By generalizing the Fujikawa approach, we show in the path-integral formalism: (1) how the infinitesimal variation of the fermion measure can be integrated to obtain the full anomalous chiral action; (2) how the action derived in this way can be identified as the Chern-Simons term in five dimensions, if the anomaly i...
['1996-02-27']
14,013
['eng']
['Lü, H', 'Pope, C N', 'Stelle, Kellogg S']
['Weyl group invariance and p-brane multiplets']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'duality, transformation', 'invariance, Weyl', 'membrane model, p-brane']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602140']
['In this paper, we study the actions of the Weyl groups of the U duality groups for type IIA string theory toroidally compactified to all dimensions D\\ge 3. We show how these Weyl groups implement permutations of the field strengths, and we discuss the Weyl group multiplets of all supersymmetric p-brane solitons.']
['1996-02-27']
14,014
['eng']
['Brumby, S P', 'Foot, R', 'Volkas, R R']
['Quaternionic formulation of the exact parity model']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'fermion', 'Higgs model', 'coupling, Yukawa', 'Yukawa, coupling', 'invariance, parity', 'parity, invariance', 'algebra, quaternion']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602139']
['The exact parity model (EPM) is a simple extension of the Standard Model which reinstates parity invariance as an unbroken symmetry of nature. The mirror matter sector of the model can interact with ordinary matter through gauge boson mixing, Higgs boson mixing and, if neutrinos are massive, through neutrino mixing. ...
['1996-02-27']
14,015
['eng']
['Fosco, C D', 'Matsuyama, T']
['The SU(2) non-linear $\\sigma$-model in 2+1 dimensions']
['Particle Physics - Theory']
['sigma model, nonlinear', 'symmetry, SU(2)', 'dimension, 3', 'perturbation theory', 'propagator', 'gauge fixing', 'invariance, Becchi-Rouet-Stora', 'Feynman graph', 'path integral, measure']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602142']
['We construct a perturbation theory for the SU(2) non-linear Sigma-model in 2+1 dimensions using a polynomial, first-order formulation, where the variables are a non-Abelian vector field L_mu (the left SU(2) current), and a non-Abelian pseudovector field \\theta_{\\mu}, which imposes the condition F_{mu nu}(L) = 0. Th...
['1996-02-27']
14,016
['eng']
['Fosco, C D', 'Matsuyama, T']
['Canonical structure of the non-linear $\\sigma$-model in a polynomial formulation']
['Particle Physics - Theory']
['sigma model, nonlinear', 'dimension, >2', 'symmetry, SU(N)', 'Hamiltonian formalism', 'constraint', 'invariance, gauge']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602143']
["We study the canonical structure of the SU(N) non-linear Sigma-model in a polynomial, first-order representation. The fundamental variables in this description are a non-Abelian vector field L_mu and a non-Abelian antisymmetric tensor field theta_{mu nu}, which constrains L_{mu} to be a `pure gauge' (F_{mu nu}(L) = 0...
['1996-02-27']
14,017
['eng']
['Bordag, M', 'Kirsten, K']
['Vacuum energy in a spherically symmetric background field']
['Particle Physics - Theory']
['field theory, scalar', 'background field', 'quantization', 'energy, ground state', 'scattering', 'symmetry, rotational', 'analytic properties', 'asymptotic behavior', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9608070']
['The vacuum energy of a scalar field in a spherically symmetric background field is considered. It is expressed through the Jost function of the corresponding scattering problem. The renormalization is discussed in detail and performed using the uniform asymptotic expansion of the Jost function. The method is demonstr...
['1996-08-14']
14,018
['eng']
['Bailin, David', 'Love, A', 'Sabra, W A', 'Thomas, S']
['Gauge coupling constant unification with Planck scale values of moduli']
['Particle Physics - Theory']
['string model, heterotic', 'effective action', 'grand unified theory', 'orbifold', 'moduli space', 'symmetry breaking', 'coupling constant', 'renormalization group', 'group theory, representation']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602132']
['Convergence of the standard model gauge coupling constants to a common value at around 2\\times 10^{16} GeV is studied in the context of orbifold theories where the modular symmetry groups for T and U moduli are broken to subgroups of PSL(2, Z). The values of the moduli required for this unification of coupling const...
['1996-02-26']
14,019
['eng']
['Myung, Y S']
['Chiral boson, W$_{\\infty}$-coherent state and edge states in the quantum Hall effect']
['Particle Physics - Theory']
['Hall effect', 'boson, chiral', 'quantization', 'droplet', 'Schroedinger equation', 'linear spaces, Fock space', 'wave function', 'algebra, W(infinity)', 'coherent state']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602133']
['We perform consistently the Gupta-Bleuler quantization combined with Dirac procedure for a chiral boson with the parameter (\\alpha) on the circle, the boundary of the circular droplet. For \\alpha =1, we obtain the holomorphic constraints. Using the representation of Bargmann-Fock space and the Schr\\"odinger equati...
['1996-02-26']
14,020
['eng']
['Gubser, S S', 'Klebanov, Igor R', 'Peet, A W']
['Entropy and temperature of black 3-branes']
['Particle Physics - Theory']
['membrane model, p-brane', 'p-brane, 3', 'perturbation theory', 'statistical mechanics', 'entropy', 'temperature']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602135']
['We consider slightly non-extremal black 3-branes of type IIB supergravity and show that their Bekenstein-Hawking entropy agrees with the counting of states of the Dirichlet 3-brane. The Dirichlet brane excitations are described in terms of the statistical mechanics of a 3+1 dimensional gas of massless open string sta...
['1996-02-26']
14,021
['eng']
['Ferrara, Sergio', 'Kallosh, R']
['Supersymmetry and attractors']
['Particle Physics - Theory']
['supergravity', 'space-time', 'soliton', 'stability', 'chaos', 'supersymmetry, transformation', 'central charge', 'black hole', 'entropy', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602136']
['We find a general principle which allows one to compute the area of the horizon of N=2 extremal black holes as an extremum of the central charge. One considers the ADM mass equal to the central charge as a function of electric and magnetic charges and moduli and extremizes this function in the moduli space (a minimum...
['1996-02-26']
14,022
['eng']
['Russo, Jorge G']
['Model of black hole evolution']
['Particle Physics - Theory']
['Einstein equation, solution', 'boundary condition', 'black hole', 'radiation, Hawking', 'energy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602124']
['From the postulate that a black hole can be replaced by a boundary on the apparent horizon with suitable boundary conditions, an unconventional scenario for the evolution emerges. Only an insignificant fraction of energy of order (mG)^{-1} is radiated out. The outgoing wave carries a very small part of the quantum me...
['1996-02-23']
14,023
['eng']
['Comellas, J', 'Latorre, J I']
['Wilsonian vs. 1PI renormalization group flow irreversibility']
['Particle Physics - Theory']
['renormalization group, transformation', 'partition function', 'two-point function', 'spectral representation', 'effective action']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602123']
['We present a line of reasoning based on the analysis of scale variations of the Wilsonian partition function and the trace of the stress tensor in a curved manifold which results in a statement of irreversibility of Wilsonian renormalization group flow for unitary theories. We also analyze subtleties related to subtr...
['1996-02-23']
14,024
['eng']
['Jackiw, R W']
['The unreasonable effectiveness of quantum field theory']
['Particle Physics - Theory']
['talk, Calcutta 1996/01/02', 'talk, Boston 1996/03/01', 'perturbation theory, higher-order', 'renormalization', 'symmetry, spontaneously broken', 'anomaly', 'path integral']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602122']
["Quantum field theory offers physicists a tremendously wide range of application; it is both a language with which a vast variety of physical processes can be discussed and also it provides a model for fundamental physics, the so-called ``standard-model,'' which thus far has passed every experimental test. No other fr...
['1996-02-23']
14,025
['eng']
['Caldwell, R R', 'Chamblin, A', 'Gibbons, G W']
['Pair creation of black holes by domain walls']
['Particle Physics - Theory']
['relativity theory, general', 'field theory, scalar', 'field equations, solution', 'domain wall', 'black hole, pair production', 'pair production, black hole', 'charge, magnetic', 'Kaluza-Klein model, monopole', 'spontaneous compactification', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602126']
['In this paper we study the production of pairs of neutral and charged black holes by domain walls, finding classical solutions and calculating their classical actions. We find that neutral black holes whose creation is mediated by Euclidean instantons must be produced mutually at rest with respect to one another, but...
['1996-02-23']
14,026
['eng']
['Grignani, G', 'Sodano, P', 'Scrucca, Claudio A']
['Quantum states of topologically massive electrodynamics and gravity']
['Particle Physics - Theory']
['quantum electrodynamics, topological', 'quantum gravity', 'dimension, 3', 'mass, topological', 'topological, mass', 'phase space', 'polarization, tensor', 'tensor, polarization', 'regularization', 'algebra, Poincare', 'quantum algebra']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602127']
["The free quantum states of topologically massive electrodynamics and gravity in 2+1 dimensions, are explicitly found. It is shown that in both theories the states are described by infrared-regular polarization tensors containing a regularization phase which depends on the spin. This is done by explicitly realizing th...
['1996-02-23']
14,027
['eng']
['Tugai, V V', 'Zheltukhin, A A']
['Supersymmetric electrodynamics of charged and neutral fermions in the extended Wheeler-Feynman approach']
['Particle Physics - Theory']
['quantum electrodynamics', 'supersymmetry, superfield', 'fermion, propagator']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602128']
['A supersymmetric formulation of the classical action of interacting charged and neutral fermions with arbitrary anomalous magnetic moment is considered. This formulation generalizes the known action for scalar charged particles investigated in papers by Fokker, Schwarzschild, Tetrode, Wheeler and Feynman. The superfi...
['1996-02-23']
14,028
['eng']
['Lee, M H', 'Kim, J K']
['The entropy of a quantum field in a charged Kerr black hole']
['Particle Physics - Theory']
['quantum gravity', 'field theory, scalar', 'black hole', 'temperature, Hawking', 'entropy', 'partition function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602129']
["We calculate the entropies of the system of classical particles and a quantum scalar field by using the brick wall method in thermal bath in a charged Kerr black hole spacetime. Their leading terms at Hartle-Hawking temperature T_H = \\kappa/(2 \\pi) are given by S_{cl} \\approx N \\ \\ln \\left( \\frac{A_b}{\\epsilo...
['1996-02-23']
14,029
['eng']
['Fosco, C D', 'Matsuyama, T']
['The polynomial formulation of the U(1) non-linear sigma-model in 2 dimensions']
['Particle Physics - Theory']
['sigma model, nonlinear', 'dimension, 2', 'symmetry, SU(N)', 'partition function', 'lattice field theory', 'correlation function', 'sine-Gordon model', 'string model', 'vertex function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602131']
['We investigate some properties of a first-order polynomial formulation of the U(1) non-linear sigma-model in two Euclidean dimensions. The variables in this description are a 1-form field plus a 0-form Lagrange multiplier field. The usual spin variables are non-local functions of the new fields. As this construction ...
['1996-02-23']
14,030
['eng']
['Elizalde, E', 'Lygren, M', 'Vasilevich, D V']
['Antisymmetric tensor fields on spheres']
['Particle Physics - Theory']
['field theory, tensor', 'space-time, sphere', 'path integral, determinant', 'regularization, heat kernel']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602113']
['The Hodge--de Rham Laplacian on spheres acting on antisymmetric tensor fields is considered. Explicit expressions for the spectrum are derived in a quite direct way, confirming previous results. Associated functional determinants and the heat kernel expansion are evaluated. Using this method, new non--local counterte...
['1996-02-22']
14,031
['eng']
['Morrison, Douglas Robert Ogston', 'Vafa, C']
['Compactifications of F-theory on Calabi-Yau threefolds, 1']
['Particle Physics - Theory']
['string model, heterotic', 'spontaneous compactification', 'field theory, Calabi-Yau', 'duality, transformation', 'F-theory', 'geometry, algebra', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602114']
['We study compactifications of F-theory on certain Calabi--Yau threefolds. We find that N=2 dualities of type II/heterotic strings in 4 dimensions get promoted to N=1 dualities between heterotic string and F-theory in 6 dimensions. The six dimensional heterotic/heterotic duality becomes a classical geometric symmetry ...
['1996-02-22']
14,032
['eng']
['Grosse, Harald', 'Klimcík, C', 'Presnajder, P']
['On finite 4D quantum field theory in non-commutative geometry']
['Particle Physics - Theory']
['field theory, scalar', 'space-time, sphere', 'differential geometry, noncommutative', 'field theory, finite', 'quantization', 'path integral']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602115']
['The truncated 4-dimensional sphere S^4 and the action of the self-interacting scalar field on it are constructed. The path integral quantization is performed while simultaneously keeping the SO(5) symmetry and the finite number of the degrees of freedom. The usual field theory UV-divergencies are manifestly absent.']
['1996-02-22']
14,033
['eng']
['Bvckenhauer, J', 'Fuchs, J']
['Higher level WZW sectors from free fermions']
['Particle Physics - Theory']
['field theory, conformal', 'dimension, 2', 'Wess-Zumino-Witten model', 'gauge field theory', 'operator, algebra', 'algebra, representation', 'superselection rule', 'field theory, orbifold', 'coset space']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602116']
['We introduce a gauge group of internal symmetries of an ambient algebra as a new tool for investigating the superselection structure of WZW theories and the representation theory of the corresponding affine Lie algebras. The relevant ambient algebra arises from the description of these conformal field theories in ter...
['1996-02-23']
14,034
['eng']
['Aspinwall, Paul S', 'Gross, M']
['Heterotic-heterotic string duality and multiple K3 fibrations']
['Particle Physics - Theory']
['string model, heterotic', 'spontaneous compactification', 'field theory, Calabi-Yau', 'duality, transformation', 'geometry, algebra']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602118']
['A type IIA string compactified on a Calabi-Yau manifold which admits a K3 fibration is believed to be equivalent to a heterotic string in four dimensions. We study cases where a Calabi-Yau manifold can have more than one such fibration leading to equivalences between perturbatively inequivalent heterotic strings. Thi...
['1996-02-22']
14,035
['eng']
['Kempf, A']
['On noncommutative geometric regularisation']
['Particle Physics - Theory']
['differential geometry, noncommutative', 'field theory, scalar', 'path integral', 'regularization', 'linear spaces, Hilbert space']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602119']
['Studies in string theory and in quantum gravity suggest the existence of a finite lower bound to the possible resolution of lengths which, quantum theoretically, takes the form of a minimal uncertainty in positions \\Delta x_0. A finite minimal uncertainty in momenta \\Delta p_0 has been motivated from the absence of...
['1996-02-22']
14,036
['eng']
['Ganor, O J', 'Hanany, A']
['Small E$_{8}$ instantons and tensionless non-critical strings']
['Particle Physics - Theory']
['string model, heterotic', 'gauge field theory, E(8) x E(8)', 'gauge field theory, SO(32)', 'instanton', 'approximation, strong coupling', 'strong coupling, approximation', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602120']
['We use T-duality to extract information on an instanton of zero size in the E_8\\times E_8 heterotic string. We discuss the possibility of the appearance of a tensionless self-dual non-critical string through an implementation of the mechanism suggested by Strominger of two coincident 5-branes. It is argued that when...
['1996-02-22']
14,037
['eng']
['Donoghue, J F', 'Torma, T']
['On the power counting of loop diagrams in general relativity']
['Particle Physics - Theory']
['relativity theory, general', 'Feynman graph, higher-order', 'analytic properties']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602121']
['A class of loop diagrams in general relativity appears to have a behavior which would upset the utility of the energy expansion for quantum effects. We show through the study of specific diagrams that cancellations occur which restore the expected behaviour of the energy expansion. By considering the power counting i...
['1996-02-22']
14,038
['eng']
['Howe, Paul S', 'Papadopoulos, G J']
['Twistor spaces for HKT manifolds']
['Particle Physics - Theory']
['string model', 'supersymmetry, superfield', 'sigma model, nonlinear', 'Wess-Zumino-Witten model', 'dimension, 2', 'twistor']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602108']
['We construct the twistor space associated with an HKT manifold, that is, a hyper-K\\"ahler manifold with torsion, a type of geometry that arises as the target space geometry in two-dimensional sigma models with (4,0) supersymmetry. We show that this twistor space has a natural complex structure and is a holomorphic f...
['1996-02-21']
14,039
['eng']
['Arvanitis, C', 'Tzani, R']
['Equivalence between light-cone and conformal gauge in the two-dimensional string']
['Particle Physics - Theory']
['string model', 'dimension, 2', 'light cone gauge', 'conformal gauge', 'path integral, measure', 'path integral, determinant', 'regularization, Pauli-Villars']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602109']
['Aiming towards understanding the question of the discrete states in the light-cone gauge in the theory of two-dimensional strings with a linear background charge term, we show the equivalence between the light-cone and the conformal gauges at the partition function level. This is done in two different ways. Firstly, ...
['1996-02-21']
14,040
['eng']
['Geyer, B', 'Odintsov, S D']
['Chiral symmetry breaking in gauged NJL model in curved spacetime']
['Particle Physics - Theory']
['gauge field theory, SU(N)', 'Higgs model', 'fermion', 'coupling, Yukawa', 'Yukawa, coupling', 'Jona-Lasinio-Nambu model', 'symmetry breaking, chiral', 'renormalization group', 'expansion 1/N', 'space-time', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602110']
['Using the renormalization group (RG) approach and the equivalency between the class of gauge-Higgs-Yukawa models and the gauged Nambu-Jona-Lasinio (NJL) model, we study the gauged NJL model in curved space-time. The behaviour of the scalar-gravitational coupling constant \\xi(t) in both theories is discussed. The RG ...
['1996-02-21']
14,041
['eng']
['Strominger, A']
['Macroscopic entropy of N=2 extremal black holes']
['Particle Physics - Theory']
['black hole, entropy', 'moduli space', 'charge', 'supergravity', 'geometry']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602111']
['Extremal BPS-saturated black holes in N=2, d=4 supergravity can carry electric and magnetic charges (q^\\Lambda_{(m)},q_\\Lambda^{(e)}). It is shown that in smooth cases the moduli fields at the horizon take a fixed "rational" value X^\\Lambda(q_{(m)},q^{(e)}) which is determined by the charges and is independent of ...
['1996-02-21']
14,042
['eng']
['Aldabe, F', 'Larsen, A L']
['Supermembranes and superstrings with extrinsic curvature']
['Particle Physics - Theory']
['string model', 'membrane model', 'supersymmetry', 'dimension, 11', 'space-time', 'field equations, soliton', 'effective action']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602112']
['In a recent paper Townsend suggested to associate to the D=11 solitonic membrane of N=1 supergravity a certain thickness, and then to identify this membrane with the fundamental supermembrane. By integrating out the 8 transverse dimensions of the "thick" solitonic membrane, we show that the resulting world-volume act...
['1996-02-21']
14,043
['eng']
['Furlan, Paolo', 'Hadjiivanov, L K', 'Todorov, I T']
['Operator realization of the SU(2) WZNW model']
['Particle Physics - Theory']
['field theory, conformal', 'dimension, 2', 'Wess-Zumino-Witten model', 'symmetry, SU(2)', 'operator, algebra', 'algebra, exchange', 'exchange, algebra', 'quantum group']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602101']
['Decoupling the chiral dynamics in the canonical approach to the WZNW model requires an extended phase space that includes left and right monodromy variables. Earlier work on the subject, which traced back the quantum qroup symmetry of the model to the Lie-Poisson symmetry of the chiral symplectic form, left some open...
['1996-02-20']
14,044
['eng']
['Ferrara, Sergio', 'Khuri, R R', 'Minasian, R']
['M-theory on a Calabi-Yau manifold']
['Particle Physics - Theory']
['M-theory', 'dimension, 11', 'spontaneous compactification', 'field theory, Calabi-Yau', 'duality, transformation', 'soliton', 'perturbation theory, higher-order', 'anomaly', 'membrane model, p-brane']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602102']
['We compactify M-theory on a Calabi-Yau manifold to five dimensions by wrapping the membrane and fivebrane solitons of the eleven-dimensional supergravity limit around Calabi-Yau two-cycles and four-cycles respectively. We identify the perturbative and non-perturbative BPS states thus obtained with those of heterotic ...
['1996-02-20']
14,045
['eng']
['Martellini, M', 'Yoshida, K', 'Spreafico, M']
['The quantization of anomalous gauge field theory and BRST-invariant models of two dimensional quantum gravity']
['Particle Physics - Theory']
['quantum gravity', 'dimension, 2', 'gauge field theory', 'anomaly', 'invariance, Becchi-Rouet-Stora', 'invariance, diffeomorphism', 'effective action', 'regularization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602103']
['We analyze the problems with the so called gauge invariant quantization of the anomalous gauge field theories originary due to Faddeev and Shatashvili (FS). Our analysis bring to a generalization of FS method which allows to construct a series of classically equivalent theories which are non equivalent at quantum lev...
['1996-02-20']
14,046
['eng']
['Meggiolaro, E']
['The high-energy quark-quark scattering']
['Particle Physics - Theory']
['quark quark, interaction', 'interaction, quark quark', 'scattering amplitude', 'analytic properties', 'Wilson loop', 'space-time, Minkowski', 'space-time, Euclidean', 'quantum electrodynamics', 'quantum chromodynamics', 'lattice field theory', 'vacuum state, stochastic']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602104']
['In this paper we consider some analytic properties of the high--energy quark--quark scattering amplitude, which, as is well known, can be described by the expectation value of two lightlike Wilson lines, running along the classical trajectories of the two colliding particles. We shall prove that the expectation value...
['1996-02-20']
14,047
['eng']
['Cortés, J L', 'Plyushchay, M S']
['Comment on "New pseudoclassical model for Weyl particles"']
['Particle Physics - Theory']
['particle, Weyl', 'model, quasiclassical']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602106']
['It is demonstrated that the recently proposed pseudoclassical model for Weyl particles [1] (D.M. Gitman, A.E. Goncalves and I.V. Tyutin, Phys. Rev. D 50 (1994) 5439) is classically inconsistent. A possible way of removing the classical inconsistency of the model is proposed.']
['1996-02-20']
14,048
['eng']
['Frolov, V P', 'Israel, W', 'Solodukhin, S N']
['On one-loop quantum corrections to the thermodynamics of charged black holes']
['Particle Physics - Theory']
['black hole, horizon', 'dimension, 2', 'dimension, 4', 'Einstein-Maxwell equation', 'symmetry, rotational', 'thermodynamics', 'correction, higher-order', 'model, off-shell', 'radiation, Hawking', 'effect, back reaction', 'energy', 'entropy', 'space-time, singularity']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602105']
["Quantum corrections are studied for a charged black hole in a two-dimensional model obtained by spherisymmetric reduction of the 4D Einstein-Maxwell theory. The classical (tree-level) thermodynamics is re-formulated in the framework of the off-shell approach, considering systems at arbitrary temperature. This implies...
['1996-02-20']
14,049
['eng']
['Horváthy, P A', 'Yéra, J C']
['Bäcklund transformation for non-relativistic Chern-Simons vortices']
['Particle Physics - Theory']
['gauge field theory, U(1)', 'Higgs model', 'Chern-Simons term', 'nonrelativistic', 'dimension, 3', 'Schroedinger equation, vortex', 'Baecklund transformation']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602090']
['A B\\"acklund transformation yielding the static non-relativistic Chern-Simons vortices of Jackiw and Pi is presented.']
['1996-02-19']
14,050
['eng']
['Bordag, M', 'Kirsten, K', 'Dowker, John S']
['Heat-kernels and functional determinants on the generalized cone']
['Particle Physics - Theory']
['space-time', 'path integral, determinant', 'regularization, zeta function', 'regularization, heat kernel', 'field theory, monopole', 'analytic properties']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602089']
['We consider zeta functions and heat-kernel expansions on the bounded generalized cone in arbitrary dimensions using an improved calculational technique. The specific case of a global monopole is analysed in detail and some restrictions thereby placed on the A_{5/2} coefficient. The computation of functional determina...
['1996-02-19']
14,051
['eng']
['Gasperini, M', 'Maharana, J P', 'Veneziano, Gabriele']
['Graceful exit in quantum string cosmology']
['Particle Physics - Theory']
['quantum cosmology, superspace', 'string model', 'Wheeler-DeWitt equation, solution', 'symmetry, O(N,N)', 'critical phenomena', 'astrophysics, wave function', 'duality']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602087']
['We write an O(d,d)-covariant Wheeler-De Witt equation in the (d^2+1)-dimensional minisuperspace of low-energy cosmological string backgrounds. We discuss explicit examples of transitions between two duality-related cosmological phases, and we find a finite quantum transition probability even when the two phases are c...
['1996-02-19']
14,052
['eng']
['Nergiz, S', 'Saçlioglu, C']
['Liouville vortex and $\\phi^{4}$ kink solutions of the Seiberg-Witten equations']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'supersymmetry', 'dimensional reduction', 'dimension, 4', 'dimension, 2', 'field theory, Liouville', 'phi**n model, 4', 'field equations, soliton', 'regularization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602088']
['The Seiberg--Witten equations, when dimensionally reduced to \\bf R^{2}\\mit, naturally yield the Liouville equation, whose solutions are parametrized by an arbitrary analytic function g(z). The magnetic flux \\Phi is the integral of a singular Kaehler form involving g(z); for an appropriate choice of g(z) , N coaxia...
['1996-02-19']
14,053
['eng']
['Alves-Dias, S', 'Silva-Neto, M B']
['On bosonization ambiguities of two dimensional quantum electrodynamics']
['Particle Physics - Theory']
['quantum electrodynamics', 'dimension, 2', 'fermion', 'path integral, determinant', 'charge, topological', 'correlation function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602092']
['We study bosonization ambiguities in two dimensional quantum eletrodynamics in the presence and in the absence of topologically charged gauge fields. The computation of fermionic correlation functions gives us a mechanism to fix the ambiguities in nontrivial topologies, provided that we do not allow changes of sector...
['1996-02-19']
14,054
['eng']
['Chu, C S', 'Ho, P M', 'Zumino, B']
['Non-abelian anomalies and effective actions for a homogeneous space G/H']
['Particle Physics - Theory']
['gauge field theory', 'coset space', 'anomaly', 'Chern-Simons term', 'effective action', 'parity, transformation', 'transformation, parity']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602093']
['We consider the problem of constructing the fully gauged effective action for Nambu-Goldstone bosons valued in a homogeneous space G/H, with the requirement that the action be invariant under the gauge transformations of H. We show that this can be done whenever G/H is reductive and H is embedded in G so as to be ano...
['1996-02-19']
14,055
['eng']
['Bimonte, G', 'Stern, A', 'Vitale, P']
['SU$_{q}$(2) lattice gauge theory']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'lattice field theory', 'Hamiltonian formalism', 'quantum group', 'quantization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602094']
['We reformulate the Hamiltonian approach to lattice gauge theories such that, at the classical level, the gauge group does not act canonically, but instead as a Poisson-Lie group. At the quantum level, it then gets promoted to a quantum group gauge symmetry. The theory depends on two parameters - the deformation param...
['1996-02-19']
14,056
['eng']
['Gasperini, M', 'Veneziano, Gabriele']
['Birth of the universe as quantum scattering in string cosmology']
['Particle Physics - Theory']
['quantum cosmology', 'string model', 'Wheeler-DeWitt equation', 'astrophysics, wave function', 'tunneling']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602096']
['In a Wheeler-de Witt approach to quantum string cosmology, the present state of the Universe arises from the scattering and reflection of the wave function representing the initial string vacuum in superspace. This scenario is described and compared with the more conventional quantum cosmology picture, in which the b...
['1996-02-19']
14,057
['eng']
['Aldazabal, G', 'Font, A', 'Ibáñez, L E', 'Quevedo, F']
['Heterotic/heterotic duality in D=6,4']
['Particle Physics - Theory']
['string model, heterotic', 'gauge field theory, E(8) x E(8)', 'spontaneous compactification', 'field theory, Kaehler', 'duality, transformation', 'dimension, 4', 'dimension, 6', 'renormalization group, beta function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602097']
["We consider E_8\\times E_8 heterotic compactifications on K3 and K3\\times T^2. The idea of heterotic/heterotic duality in D=6 has difficulties for generic compactifications since for large dilaton values some gauge groups acquire negative kinetic terms. Recently Duff, Minasian and Witten (DMW) suggested a solution t...
['1996-02-19']
14,058
['eng']
['Singleton, D']
['Infinite Energy Dyon Solutions']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'Higgs model', 'field equations, dyon', 'analytic properties']
['http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602098']
['Three dyon solutions to the SU(2) Yang-Mills-Higgs system are presented. These solutions are obtained from the BPS dyon by allowing the gauge fields to be complex, or by letting the free parameter of the BPS solution become imaginary. In all cases however the physically measurable quantities connected with these new ...
['2000-10-05']
14,059
['eng']
['Sezgin, E']
['Is there a stringy description of self-dual supergravity in 2+2 dimensions?']
['Particle Physics - Theory']
['talk, Trieste 1995/06/29', 'supergravity', 'string model', 'duality', 'transformation, Becchi-Rouet-Stora', 'operator product expansion']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602099']
['The well known N=2 string theory describes self-dual gravity, as was shown by Ooguri and Vafa sometime ago. In search of a variant of this theory which would describe self-dual supergravity in 2+2 dimensions, we have constructed two new N=2 strings theories in which the target space is a superspace. Both theories con...
['1996-02-19']
14,060
['eng']
['Kuchiev, M Yu']
['The search for "polarized" instantons in the vacuum']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'fermion', 'instanton', 'vacuum state', 'asymptotic behavior', 'mean field approximation', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602100']
["The new phase of a gauge theory in which the instantons are ``polarized'', i.e. have the preferred orientation is discussed. A class of gauge theories with the specific condensates of the scalar fields is considered. In these models there exists an interaction between instantons resulting from one-fermion loop correc...
['1996-02-19']
14,061
['eng']
['Ivanov, E A']
['Harmonic superspace']
['Particle Physics - Theory']
['talk, Dubna 1995/06/26', 'supersymmetry, superspace', 'superspace, harmonic', 'sigma model, nonlinear', 'dimension, 2', 'torsion', 'symmetry, SU(2) x SU(2)', 'field theory, conformal', 'Korteweg-de Vries equation, hierarchy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602079']
["We give a brief account of two recent applications of the harmonic superspace method: (i) an off-shell description of torsionful (4,4) supersymmetric 2D sigma models in the framework of SU(2)\\times SU(2) harmonic superspace and (ii) the harmonic superspace formulation of ``small'' N=4 SU(2) superconformal algebra an...
['1996-02-16']
14,062
['eng']
['Fujikawa, K']
['On an exact path integral of the hydrogen atom']
['Particle Physics - Theory']
['hydrogen, atom', 'path integral', 'field equations, Liouville', 'Hamiltonian formalism', 'quantum gravity', 'dimension, 1', 'matter, coupling', 'coupling, matter', 'invariance, Becchi-Rouet-Stora']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602080']
["The path integral evaluation of the hydrogen atom by Duru and Kleinert is studied by recognizing it as a special case of the general treatment of the separable Hamiltonian of Liouville-type. The basic dynamical principle involved is identified as the Jacobi's principle of least action for given energy which is repara...
['1996-02-16']
14,063
['eng']
['Ferrari, F', 'Bilal, Adel']
['The strong-coupling spectrum of the Seiberg-Witten theory']
['Particle Physics - Theory']
['gauge field theory, SU(2)', 'supersymmetry', 'approximation, strong coupling', 'strong coupling, approximation', 'field theory, soliton', 'particle, spectra', 'spectra, particle', 'symmetry, Z(2)', 'analytic properties']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602082']
['We carefully study the global structure of the solution of the N=2 supersymmetric pure Yang-Mills theory with gauge group SU(2) obtained by Seiberg and Witten. We exploit its {\\bf Z}_2-symmetry and determine the curve in moduli space where BPS states can become unstable, separating the strong-coupling from the weak-...
['1996-02-16']
14,064
['eng']
['Bagán, E', 'Lavelle, M J', 'McMullan, D']
['A class of physically motivated gauges with an infra-red finite electron propagator']
['Particle Physics - Theory']
['quantum electrodynamics', 'electron, model', 'propagator', 'perturbation theory, higher-order', 'renormalization', 'infrared problem']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602083']
['We investigate the properties of a dressed electron which reduces, in a particular class of gauges, to the usual fermion. A one-loop calculation of the propagator is presented. We show explicitly that an infra-red finite, multiplicative mass shell renormalisation is possible for this dressed electron, or, equivalentl...
['1996-02-16']
14,065
['eng']
['Kehagias, A A', 'Lukas, A']
['O(d,d) symmetry in quantum cosmology']
['Particle Physics - Theory']
['quantum cosmology', 'string model', 'symmetry, O(N,N)', 'effective action', 'Wheeler-DeWitt equation, solution', 'black hole, wave function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602084']
['We analyze the quantum cosmology of one--loop string effective models which exhibit an O(d,d) symmetry. It is shown that due to the large symmetry of these models the Wheeler--de Witt equation can completely be solved. As a result, we find a basis of solutions with well defined transformation properties under O(d,d) ...
['1996-02-16']
14,066
['eng']
['Kempf, A']
['On quantum field theory with nonzero minimal uncertainties in positions and momenta']
['Particle Physics - Theory']
['path integral, measure', 'differential geometry, noncommutative', 'phi**n model, 4', 'perturbation theory', 'regularization', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602085']
['We continue studies on quantum field theories on noncommutative geometric spaces, focusing on classes of noncommutative geometries which imply ultraviolet and infrared modifications in the form of nonzero minimal uncertainties in positions and momenta. The case of the ultraviolet modified uncertainty relation which h...
['1996-02-16']
14,067
['eng']
['Mukaida, H', 'Shimada, Y']
['Convex effective potential of O(N)-symmetric $\\phi^{4}$ theory for large N']
['Particle Physics - Theory']
['phi**n model, 4', 'symmetry, O(N)', 'lattice field theory, continuum limit', 'expansion 1/N', 'symmetry, spontaneously broken', 'effective potential']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602086']
['We obtain effective potential of O(N)-symmetric \\phi^4 theory for large N starting with a finite lattice system and taking the thermodynamic limit with great care. It is globally real-valued and convex in both the symmetric and the broken phases. In particular, it has a flat bottom in the broken phase, which is tota...
['1996-02-16']
14,068
['eng']
['Ito, K', 'Sasakura, N']
['One-instanton calculations in N=2 supersymmetric SU(N$_{c}$) Yang-Mills theory']
['Particle Physics - Theory']
['gauge field theory, SU(N)', 'supersymmetry', 'field theory, instanton', 'potential, flat direction', 'n-point function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602073']
['We calculate the one-instanton contribution to the prepotential in N=2 supersymmetric SU(N_c) Yang-Mills theory from the microscopic viewpoint. We find that the holomorphy argument simplifies the group integrations of the instanton configurations. For N_{c}=3, the result agrees with the exact solution.']
['1996-02-15']
14,069
['eng']
['Ushveridze, A G']
['Quasi-exactly solvable models and W-algebras']
['Particle Physics - Theory']
['differential equations', 'integrability', 'algebra, W(N)']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602076']
['The relationship between the quasi-exactly solvable problems and W-algebras is revealed. This relationship enabled one to formulate a new general method for building multi-dimensional and multi-channel exactly and quasi-exactly solvable models with hermitian hamiltonians. The method is based on the use of multi-param...
['1996-02-15']
14,070
['eng']
['Green, M B', 'Gutperle, M']
['Comments on three-branes']
['Particle Physics - Theory']
['membrane model, p-brane', 'p-brane, 3', 'supersymmetry', 'symmetry, SL(2,R)', 'effective action', 'soliton', 'gauge field theory, SU(2)']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602077']
['The Born--Infeld-like effective world-volume theory of a single 3-brane is deduced from a manifestly space-time supersymmetric description of the corresponding D-brane. This is shown to be invariant under SL(2,R) transformations that act on the abelian gauge field as well as the bulk fields. The effective theory of t...
['1996-02-15']
14,071
['eng']
['Adams, D H']
['Perturbative expansion in gauge theories on compact manifolds']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'space-time', 'path integral', 'perturbation theory', 'background field', 'dependence, gauge']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602078']
['A geometric formal method for perturbatively expanding functional integrals arising in quantum gauge theories is described when the spacetime is a compact riemannian manifold without boundary. This involves a refined version of the Faddeev-Popov procedure using a generalised Lorentz gauge-fixing condition with backgr...
['1996-02-15']
14,072
['eng']
['Ortín, Tomas']
['Massless black holes as black diholes and quadruholes']
['Particle Physics - Theory']
['black hole, massless', 'massless, black hole', 'bound state', 'Einstein equation, solution', 'boundary condition', 'supersymmetry']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602067']
["Massless black holes can be understood as bound states of a (positive mass) extreme a=\\sqrt{3} black hole and a singular object with opposite ({\\it i.e.}~negative) mass with vanishing ADM (total) mass but non-vanishing gravitational field. Supersymmetric balance of forces is crucial for the existence of this kind o...
['1996-02-14']
14,073
['eng']
['Gates, S J', 'Rana, L']
['Tuning the radio to the off-shell 2D Fayet hypermultiplet problem']
['Particle Physics - Theory']
['supersymmetry, algebra', 'algebra, representation', 'supersymmetry, multiplet', 'multiplet, supersymmetry', 'constraint', 'field theory, action', 'dimension, 2']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602072']
["We show via use of the RADIO technique that an off-shell (4,0) version of the hypermultiplet, in the form first proposed by Fayet, exists and contains 28 - 28 component fields. The off-shell structure uncovered is found to include a chiral truncation of the ``generalized 2D, N = 4 tensor multiplet formalism'' propose...
['1996-02-14']
14,074
['eng']
['Aratyn, H', 'Nissimov, Emil R', 'Pacheva, S']
['Virasoro symmetry of constrained KP hierarchies']
['Particle Physics - Theory']
['Kadomtsev-Petviashvili equation', 'differential equations, hierarchy', 'symmetry, Virasoro', 'constraint', 'Baecklund transformation', 'matrix model', 'string model']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602068']
['Additional non-isospectral symmetries are formulated for the constrained Kadomtsev-Petviashvili (\\cKP) integrable hierarchies. The problem of compatibility of additional symmetries with the underlying constraints is solved explicitly for the Virasoro part of the additional symmetry through appropriate modification o...
['1996-02-14']
14,075
['eng']
['Olmsted, D L', 'Schnitzer, H J']
['The gauged vector model in four-dimensions']
['Particle Physics - Theory']
['gauge field theory, U(N)', 'field theory, scalar', 'effective potential', 'perturbation theory, higher-order', 'expansion 1/N', 'renormalization group', 'asymptotic freedom', 'numerical calculations']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602069']
['A calculation of the renormalization group improved effective potential for the gauged U(N) vector model, computed to leading order in 1/N, all orders in the scalar self-coupling \\l, and lowest order in gauge coupling g^2, is presented. It is shown that \\b_\\l has an infrared fixed point for \\l (M_0) = 6 \\, g^2 (...
['1996-02-14']
14,076
['eng']
['Witten, Edward']
['Strong coupling expansion of Calabi-Yau compactification']
['Particle Physics - Theory']
['string model, heterotic', 'symmetry, E(8) x E(8)', 'spontaneous compactification, Calabi-Yau', 'expansion, strong coupling', 'strong coupling, expansion', 'gravitation, fundamental constant']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602070']
["In a certain strong coupling limit, compactification of the E_8\\times E_8 heterotic string on a Calabi-Yau manifold X can be described by an eleven-dimensional theory compactified on X\\times \\S^1/\\Z_2. In this limit, the usual relations among low energy gauge couplings hold, but the usual (problematic) prediction...
['1996-02-14']
14,077
['eng']
['Becker, K', 'Becker, M']
['Boundaries in M-theory']
['Particle Physics - Theory']
['membrane model, p-brane', 'dimension, 11', 'supersymmetry, superspace', 'boundary condition', 'geometry, algebra', 'M-theory']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602071']
["We formulate boundary conditions for an open membrane that ends on the fivebrane of {\\cal M}-theory. We show that the dynamics of the eleven-dimensional fivebrane can be obtained from the quantization of a ``small membrane'' that is confined to a single fivebrane and which moves with the speed of light. This shows t...
['1996-02-14']
14,078
['eng']
['Ghosh, A', 'Mitra, P']
['Entropy of extremal dyonic black holes']
['Particle Physics - Theory']
['black hole, dyon', 'entropy, thermodynamical', 'string model']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602057']
['For extremal charged black holes, the thermodynamic entropy is proportional not to the area but to the mass or charges. This is demonstrated here afresh for dyonic extremal black hole solutions of string theory. By combining the general form of the entropy allowed by thermodynamics with recent observations in the lit...
['1996-02-13']
14,079
['eng']
['Kehagias, A A']
['Type IIA/IIB string duality for targets with abelian isometries']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'partition function', 'Riemann surfaces', 'duality, transformation', 'anomaly']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602059']
['We examine T-duality transformations for supersymmetric strings with target space geometry with compact abelian isometries. We consider the partition function of these models and we show that although T-duality is not a symmetry, due to an anomaly, it relates type IIA to type IIB strings. In this way we extend the co...
['1996-02-13']
14,080
['eng']
['Petkou, Anastasios C']
['Operator product expansions and consistency relations in a O(N) invariant fermionic CFT for 2<d<4']
['Particle Physics - Theory']
['field theory, conformal', 'dimension, >2', 'dimension, <4', 'fermion', 'symmetry, O(N)', 'operator product expansion', 'expansion 1/N']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602054']
['A conformally invariant theory of Majorana fermions in 2<d<4 with O(N) symmetry is studied using Operator Product Expansions and consistency relations based on the cancellation of shadow singularities. The critical coupling G_{*} of the theory is calculated to leading order in 1/N. This value is then used to reproduc...
['1996-02-13']
14,081
['eng']
['Devchand, C', 'Ogievetsky, N V']
['Unravelling the on-shell constraints of self-dual supergravity theories']
['Particle Physics - Theory']
['talk', 'supergravity', 'constraint, solution', 'duality', 'supersymmetry, superspace', 'superspace, harmonic']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602058']
['We review a construction, using the harmonic space method, of solutions to the superfield equations of motion for N-extended self-dual supergravity theories. A superspace gauge condition suitable for the performance of a component analysis is discussed.']
['1996-02-13']
14,082
['eng']
['Di Vecchia, P', 'Lerda, A', 'Magnea, L', 'Marotta, R', 'Russo, R']
['Renormalization constants from string theory']
['Particle Physics - Theory']
['talk', 'string model, boson', 'gauge field theory, Yang-Mills', 'scattering amplitude, higher-order', 'higher-order, scattering amplitude', 'renormalization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602055']
["We review some recent results on the calculation of renormalization constants in Yang-Mills theory using open bosonic strings. The technology of string amplitudes, supplemented with an appropriate continuation off the mass shell, can be used to compute the ultraviolet divergences of dimensionally regularized gauge th...
['1996-02-13']
14,083
['eng']
['Di Vecchia, P', 'Lerda, A', 'Magnea, L', 'Marotta, R', 'Russo, R']
['String-derived renormalization of Yang-Mills theory']
['Particle Physics - Theory']
['talk', 'string model, boson', 'scattering amplitude, higher-order', 'higher-order, scattering amplitude', 'gauge field theory, Yang-Mills', 'renormalization']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602056']
['We review the application of bosonic string techniques to the calculation of renormalization constants and effective actions in Yang-Mills theory. We display the multiloop string formulas needed to compute Yang-Mills amplitudes, and we discuss how the renormalizations of proper vertices can be extracted in the field ...
['1996-02-13']
14,084
['eng']
['de Wit, B']
['N=2 electric-magnetic duality in a chiral background']
['Particle Physics - Theory']
['talk', 'gauge field theory, Yang-Mills', 'supersymmetry, superfield', 'background field', 'duality, transformation']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602060']
['We establish the consistency of duality transformations for generic systems of N=2 vector supermultiplets in the presence of a chiral background field. This is relevant, for instance, when dealing with spurion fields or when considering higher-derivative couplings of vector multiplets to supergravity. We point out th...
['1996-02-13']
14,085
['eng']
['Green, M B']
['World-volumes and string target spaces']
['Particle Physics - Theory']
['talk, Geneva 1995/11/27', 'string model', 'membrane model, p-brane', 'supersymmetry', 'duality, transformation', 'partition function', 'phase space', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602061']
['String duality suggests a fascinating juxtoposition of world-volume and target-space dynamics. This is particularly apparent in the D-brane description of stringy solitons that forms a major focus of this article (which is {\\it not} intended to be a comprehensive review of this extensive subject). The article is div...
['1996-02-13']
14,086
['eng']
['Cooper, L', 'Kogan, I I']
['Boundary conditions and heterotic construction in topological membrane theory']
['Particle Physics - Theory']
['membrane model', 'boundary condition', 'string model, heterotic', 'field theory, topological', 'effect, Casimir']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602062']
['Using the topological membrane approach to string theory, we suggest a geometric origin for the heterotic string. We show how different membrane boundary conditions lead to different string theories. Using zeta-function regularization, we show that the Casimir energy distinguishes between the heterotic boundary condi...
['1996-02-13']
14,087
['eng']
['Christiansen, H R', 'Schaposnik, F A', 'De la Plata, N']
['Fermion condensates of massless QED$_{2}$ at finite density in non-trivial topological sectors']
['Particle Physics - Theory']
['quantum electrodynamics, massless', 'massless, quantum electrodynamics', 'dimension, 2', 'density, finite', 'fermion, condensation', 'path integral', 'potential, chemical', 'correlation function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602063']
['Vacuum expectation values of products of local bilinears \\bar\\psi\\psi are computed in massless QED_2 at finite density. It is shown that chiral condensates exhibit an oscillatory inhomogeneous behaviour depending on the chemical potential. The use of a path-integral approach clarifies the connection of this phenom...
['1996-02-13']
14,088
['eng']
['Tseytlin, Arkady A']
['Self-duality of Born-Infeld action and Dirichlet 3-brane of type IIB superstring theory']
['Particle Physics - Theory']
['string model', 'supersymmetry', 'membrane model, p-brane', 'p-brane, 3', 'path integral', 'duality, transformation', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602064']
['D-brane actions depend on a world-volume abelian vector field and are described by Born-Infeld-type actions. We consider the vector field duality transformations of these actions. Like the usual 2d scalar duality rotations of isometric string coordinates imply target space T-duality, this vector duality is intimately...
['1996-02-13']
14,089
['eng']
['Breckenridge, J C', 'Myers, R C', 'Peet, A W', 'Vafa, C']
['D-branes and spinning black holes']
['Particle Physics - Theory']
['membrane model, p-brane', 'string model, heterotic', 'black hole', 'dimension, 5', 'spin', 'entropy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602065']
['We obtain a new class of spinning charged extremal black holes in five dimensions, considered both as classical configurations and in the Dirichlet(D)--brane representation. The degeneracy of states is computed from the D--brane side and the entropy agrees perfectly with that obtained from the black hole side.']
['1996-02-13']
14,090
['eng']
['Smith, J D', 'Toms, David J']
['Bose-Einstein condensation as symmetry breaking in compact curved spacetimes']
['Particle Physics - Theory']
['space-time', 'field theory, scalar', 'any-dimensional', 'symmetry, spontaneously broken', 'potential, chemical', 'boson, condensation', 'charge', 'regularization, zeta function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602046']
['We examine Bose-Einstein condensation as a form of symmetry breaking in the specific model of the Einstein static universe. We show that symmetry breaking never occursin the sense that the chemical potential \\mu never reaches its critical value.This leads us to some statements about spaces of finite volume in genera...
['1996-02-13']
14,091
['eng']
['Reinhardt, H']
['Emergence of the Haar measure in the standard functional integral representation of the Yang-Mills partition function']
['Particle Physics - Theory']
['gauge field theory, Yang-Mills', 'path integral, determinant', 'path integral, measure', 'phase space', 'ghost', 'invariance, gauge', 'Polyakov loop']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602047']
['The conventional path integral expression for the Yang-Mills transition amplitude with flat measure and gauge-fixing built in via the Faddeev-Popov method has been claimed to fall short of guaranteeing gauge invariance in the non-perturbative regime. We show, however, that it yields the gauge invariant partition func...
['1996-02-13']
14,092
['eng']
['Gitman, D M', 'Tyutin, I V']
['Pseudoclassical description of higher spins in 2+1 dimensions']
['Particle Physics - Theory']
['mechanics, classical', 'particle, relativistic', 'dimension, 3', 'dimension, 4', 'supersymmetry', 'spin, high', 'high, spin', 'quantization', 'Hamiltonian formalism']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602048']
['Pseudoclassical supersymmetric model to describe massive particles with higher spins (integer and half-integer) in 2+1 dimensions is proposed. The quantization of the model leads to the minimal (with only one polarization state) quantum theory. In particular, the Bargmann-Wigner type equations for higher spins arise ...
['1996-02-13']
14,093
['eng']
['Brandt, F T', 'McKeon, D G C']
['The Barton expansion and the path integral approach in thermal field theory']
['Particle Physics - Theory']
['finite temperature', 'path integral', 'n-point function', 'analytic properties']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602050']
["It has been shown how on-shell forward scattering amplitudes (the ``Barton expansion'') and quantum mechanical path integral (QMPI) can both be used to compute temperature dependent effects in thermal field theory. We demonstrate the equivalence of these two approaches and then apply the QMPI to compute the high temp...
['1996-02-13']
14,094
['eng']
['Kutasov, D', 'Martinec, Emil J']
['New principles for string/membrane unification']
['Particle Physics - Theory']
['string model, heterotic', 'membrane model', 'unified field theory', 'duality', 'field theory, conformal', 'dimension, 2', 'dimension, 3', 'partition function', 'operator, vertex', 'phase space']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602049']
['The target space theory of the N=(2,1) heterotic string may be interpreted as a theory of gravity coupled to matter in either 1+1 or 2+1 dimensions. Among the target space theories in 1+1 dimensions are the bosonic, type II, and heterotic string world sheet field theories in a physical gauge. The 2+1 dimensional vers...
['1996-02-13']
14,095
['eng']
['Horowitz, Gary T', 'Strominger, A']
['Counting states of near-extremal black holes']
['Particle Physics - Theory']
['string model', 'effective action', 'dimension, 6', 'field equations, solution', 'black hole', 'energy levels', 'charge', 'entropy']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602051']
['A six-dimensional black string is considered and its Bekenstein-Hawking entropy computed. It is shown that to leading order above extremality, this entropy precisely counts the number of string states with the given energy and charges. This identification implies that Hawking decay of the near-extremal black string c...
['1996-02-13']
14,096
['eng']
['Polchinski, Joseph', 'Chaudhuri, S', 'Johnson, C V']
['Notes on D-branes']
['Particle Physics - Theory']
['lectures', 'string model, heterotic', 'membrane model, p-brane', 'duality, transformation', 'bibliography']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602052']
['This is a series of remedial lectures on open and unoriented strings for the heterotic string generation. The particular focus is on the interesting features that arise under T-duality---D-branes and orientifolds. The final lecture discusses the application to string duality. There will be no puns. Lectures presented...
['1996-02-13']
14,097
['eng']
['Sitenko, Yu A', 'Rakityansky, D G']
['Angular momentum induced in the fermionic vacuum on a rotationally-symmetric noncompact Riemann surface']
['Particle Physics - Theory']
['quantum electrodynamics', 'fermion', 'dimension, 2', 'dimension, 3', 'Riemann surfaces', 'symmetry, rotational', 'angular momentum', 'asymptotic expansion', 'fermion number, fractional']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602053']
['The influence of spatial geometry on the vacuum polarization in 2+1-dimensional spinor electrodynamics is investigated. The vacuum angular momentum induced by an external static magnetic field is found to depend on global geometric surface characteristics connected with curvature. The relevance of the results obtaine...
['1996-02-13']
14,098
['eng']
['Cabra, D C', 'Rossini, G L']
['Spinons as composite fermions']
['Particle Physics - Theory']
['fermion, model', 'model, composite', 'postulated particle, spinon', 'spinon, postulated particle', 'field theory, conformal', 'dimension, 2', 'Wess-Zumino-Witten model', 'partition function']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602041']
['We give an explicit holomorphic factorization of SU(N)_1 WZW primaries in terms of gauge invariant composite fermions. In the N=2 case, we show that these composites realize the spinon algebra. Both in this and in the general case, the underlying Yangian symmetry implies that these operators span the whole Fock space...
['1996-02-13']
14,099
['eng']
['Fülöp, T']
['Relativistic quantum mechanics on the SL(2,R) spacetime']
['Particle Physics - Theory']
['space-time', 'quantum mechanics, relativistic', 'group theory, SL(2,C)', 'group theory, geometrical']
['http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=9602040']
['The Schr\\"odinger-type formalism of the Klein-Gordon quantum mechanics is adapted for the case of the SL(2,\\R) spacetime. The free particle case is solved, the results of a recent work are reproduced while all the other, topologically non-trivial solutions and the antiparticle modes are also found and a deeper insi...
['1996-02-13']