Quenched Chiral Behavior of Hadrons with Overlap Fermions

Abstract

We study the quenched chiral behavior of hadrons with the pseudoscalar mass as low as $\approx 280$ MeV. We look for quenched chiral logs in the pion mass, determine the renormalized quark mass, and observe quenched artifacts in the $a_0$ and $N^{\ast }$ propagators. The calculation is done on a quenched lattice of size $20^4$ and $a=0.148(2)$ fm using overlap fermions and an improved gauge action.

Lattice2001(spectrum), 3 pages, 4 figures (uses rotate.sty)