Determination of the Improvement Coefficient c_SW up to One-Loop Order with the Conventional Perturbation Theory

Abstract

We calculate the $O(a)$ improvement coefficient c_SW in the Sheikholeslami-Wohlert quark action for various improved gauge actions with six-link loops. We employ the conventional perturbation theory introducing the fictitious gluon mass to regularize the infrared divergence. Our results for some improved gauge actions are in agreement with those previously obtained with the Schrödinger functional method.

Comments: 18 pages, 1 figure as eps-file