output
19922026
Showing 1997Show all

115 papers · 1 filter

dg-ga1997★ 94 cited

On the Spinor Representation of Surfaces in Euclidean 3-Space

Thomas Friedrich

The aim of the present paper is to clarify the relationship between immersions of surfaces and solutions of the inhomogeneous Dirac equation. The main idea leading to the descripti…

hep-th1997★ 108 cited

Is there a Landau Pole Problem in QED?

M. Göckeler, R. Horsley, V. Linke +3

We investigate a lattice version of QED by numerical simulations. For the renormalized charge and mass we find results which are consistent with the renormalized charge vanishing i…

hep-th1997★ 15 cited

The entropy of near-extreme N=2 black holes

Klaus Behrndt, Mirjam Cvetic, Wafic A. Sabra

We give an explicit form of the classical entropy for four-dimensional static near-BPS-saturated black holes of generic N=2 superstring vacua. The expression is obtained by determi…

hep-lat1997★ 10 cited

Critical Dynamics of the Hybrid Monte Carlo Algorithm

SESAM, TXL collaboration, : +13

We investigate the critical dynamics of the Hybrid Monte Carlo algorithm approaching the chiral limit of standard Wilson fermions. Our observations are based on time series of leng…

cond-mat.stat-mech1997

Interaction of a granular stream with an obstacle

Volkhard Buchholtz, Thorsten Poeschel

We investigate numerically the interaction of a stream of granular particles with a resting obstacle in two dimensions. For the case of high stream velocity we find that the force…

cond-mat.str-el1997★ 24 cited

Temperature-dependent electronic structure and ferromagnetism in the d=oo Hubbard model studied by a modfied perturbation theory

T. Wegner, M. Potthoff, W. Nolting

The infinite-dimensional Hubbard model is studied by means of a modified perturbation theory. The approach reduces to the iterative perturbation theory for weak coupling. It is exa…

hep-th1997

One-Loop Free Energy of the Four-Dimensional Compact QED in the Confining Phase

D. V. Antonov

The one-loop free energy of the four-dimensional compact QED, which is known to be equivalent to the vector Sine-Gordon model, is calculated in the strong coupling regime. In the c…

hep-th1997

Field Correlators in the Georgi-Glashow Model and Several Aspects of its String Representation

D. V. Antonov

String representations of the Wilson loop and of the non-Abelian analog of the 't Hooft loop, defined on the string world-sheet, are studied in the Londons' limit of the 4D Georgi-…

hep-ph1997★ 24 cited

Modelling the QCD Phase Transition with an Effective Lagrangian of Light and Massive Hadrons

N. O. Agasian, D. Ebert, E. -M. Ilgenfritz

The temperature dependence of quark and gluon condensates in QCD as precursor of the chiral and deconfining phase transition is modelled with a conformally extended non-linear sigm…

funct-an1997★ 19 cited

Embedding of exact C*-algebras and continuous fields in the Cuntz algebra O_2

Eberhard Kirchberg, N. Christopher Phillips

We prove that any separable exact C*-algebra is isomorphic to a subalgebra of the Cuntz algebra We further prove that if is a simple separable unital nuclear C*-a…

hep-th1997★ 7 cited

Non-Abelian gauge field dynamics on matrix D-branes in curved space and two-dimensional -models

H. Dorn

A survey is given of the formulation of a -model describing an open string moving in general target space background fields and coupling to both a matrix-valued D-brane position…

hep-th1997★ 6 cited

A special irreducible matrix representation of the real Clifford algebra C(3,1)

K. Scharnhorst

4x4 Dirac (gamma) matrices (irreducible matrix representations of the Clifford algebras C(3,1), C(1,3), C(4,0)) are an essential part of many calculations in quantum physics. Altho…

hep-ph1997★ 15 cited

Semiclassical Approximation for Non-Abelian Field Strength Correlators in the Instanton Dilute Gas Model

E. -M. Ilgenfritz, B. V. Martemyanov, S. V. Molodtsov +2

Field strength correlators are semi-classically evaluated in the dilute gas model of non-Abelian sources (instantons) and compared with lattice data for QCD at zero temperature. We…

hep-ph1997★ 221 cited

Mass spectrum of orbitally and radially excited heavy-light mesons in the relativistic quark model

D. Ebert, V. O. Galkin, R. N. Faustov

The mass spectrum of orbitally and radially excited states of B and D mesons is calculated in the framework of the relativistic quark model. The expansion in inverse powers of the…

cond-mat.stat-mech1997★ 232 cited

Coefficient of normal restitution of viscous particles and cooling rate of granular gases

Thomas Schwager, Thorsten Poeschel

We investigate the cooling rate of a gas of inelastically interacting particles. When we assume velocity dependent coefficients of restitution the material cools down slower than w…

hep-th1997★ 8 cited

Dualities in all order finite N=1 gauge theories

Andreas Karch, Dieter Lust, George Zoupanos

We search for dual gauge theories of all-loop finite, N = 1 supersymmetric gauge theories. It is shown how to find explicitly the dual gauge theories of almost all chiral, N = 1, a…

hep-ex1997★ 30 cited

Photo-production of psi' Mesons at HERA

C. Adloff

Quasi-elastic (z >0.95) photo-production of psi' mesons has been observed at HERA for photon-proton centre-of-mass energies in the range 40 to 160 GeV. The psi' mesons were identif…

cond-mat1997★ 41 cited

The stability of the O(N) invariant fixed point in three dimensions

M. Caselle, M. Hasenbusch

We study the stability of the O(N) fixed point in three dimensions under perturbations of the cubic type. We address this problem in the three cases by using finite size…

cond-mat.stat-mech1997★ 29 cited

Onset of fluidization in vertically shaken granular material

Thorsten Poeschel, Thomas Schwager, Clara Saluena

When granular material is shaken vertically one observes convection, surface fluidization, spontaneous heap formation and other effects. There is a controversial discussion in lite…

hep-th1997★ 1 cited

On central charges and the entropy in matrix theory

Klaus Behrndt

The Bekenstein-Hawking entropy of BPS black holes can be obtained as the minimum of the mass (= largest central charge). In this letter we investigate the analog procedure for the…

hep-ph1997★ 16 cited

Bosonization in Particle Physics

D. Ebert

Path integral techniques in collective fields are shown to be a useful analytical tool to reformulate a field theory defined in terms of microscopic quark (gluon) degrees of freedo…

hep-ph1997★ 2 cited

Hadronization in Particle Physics

D. Ebert

The method of path integral hadronization is applied to a local quark-diquark toy model in order to derive an effective chiral meson-baryon Lagrangian. Further generalizations to m…

hep-lat1997★ 2 cited

Monte-carlo renormalization group study of gauged RP(2) spin models in two dimensions

S. M. Caterall, M. Hasenbusch, R. R. Horgan +1

The 2D RP(2) gauge model is studied using the Monte-Carlo Renormalization Group. We confirm the first-order transition reported by Solomon et al. (PL 112B, (1982)) ending in a crit…

physics.chem-ph1997

Variation of the Energy Landscape of a Small Peptide under a Change from the ECEPP/2 Force Field to ECEPP/3

Frank Eisenmenger, Ulrich H. E. Hansmann

The multicanonical ansatz is used to study variations in the energy landscape of a small peptide, Met-enkephalin, under a change from the ECEPP/2 force field to ECEPP/3. Local mini…