The U(1) Problem in Chiral Random Matrix Models

Details The U(1) Problem in Chiral Random Matrix Models The U(1) Problem in Chiral Random Matrix Models

1996-11-10

arxiv.org/abs/hep-lat/9611012v1

Nucl.Phys. B498 (1997) 313-330

Physics

High Energy Physics

High Energy Physics - Lattice

ReVTaeX, 9 pages with 2 EPS figures. Uses the feynmf package version 1.0 for Feynman graphs

Scientific paper

10.1016/S0550-3213(97)00265-4

We show that conventional asymmetric chiral random matrix models (ChRMM), with a gaussian distribution in the asymmetry, provide for a screening 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 agreement with numerical estimates using large ensembles of asymmetric ChRMM with gaussian distributions.

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