THE U(1) PROBLEM IN CHIRAL RANDOM-MATRIX MODELS

Authors
JANIK RA NOWAK MA PAPP G ZAHED I
Citation
Ra. Janik et al., THE U(1) PROBLEM IN CHIRAL RANDOM-MATRIX MODELS, Nuclear physics. B, 498(1-2), 1997, pp. 313-330
Citations number
62
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. B → ACNP
ISSN journal
05503213
Volume
498
Issue
1-2
Year of publication
1997
Pages
313 - 330
Database
ISI
SICI code
0550-3213(1997)498:1-2<313:TUPICR>2.0.ZU;2-D
Abstract
We show that conventional asymmetric chiral random matrix models (ChRM M), with a gaussian distribution in the asymmetry, provide for a scree ning of the topological charge and a resolution of the U(1) problem in the unquenched approximation. Our exact results to order 1/N are in a greement with numerical estimates using large ensembles of asymmetric ChRMM with gaussian distributions. (C) 1997 Elsevier Science B.V.