Fermion spectrum in the quenched U(1) chiral Wilson-Yukawa model

Abstract

Nature of charged fermion state is investigated in the quenched U(1) chiral Wilson-Yukawa model. Fitting the charged fermion propagator with a single hyperbolic cosine does not yield reliable result. On the other hand the behaviour of the propagator including large lattice size dependence is well described by the large Wilson-Yukawa coupling expansion, providing strong evidence that no charged state exists as an asymptotic particle in this model.

Comments: 4 pages, Talk at Lattice '92, Amsterdam, Latex file( espcrc2.sty and epsf.sty are needed), 5 PostScript files for 5 figures are appended