A nonperturbative determination of c_A and the scaling of f_pi and m^MSbar

2001/09/28 by S. Collins, C. T. H. Davies, G. P. Lepage +1
Physics and Astronomy · #hep-lat

paper · pdf

published as Nucl.Phys.Proc.Suppl. 106 (2002) 783-785 · Lattice2001(improvement), 3 pages, 3 postscript figures, espcrc2.sty

arxiv created 2001/09/28 · arxiv updated 2009/11/30

Abstract

We calculate the O(a) improvement coefficient for the axial-vector current using the nonperturbative method proposed by the LANL group. Results for the coefficient in the range β=5.93 to 6.2 are presented. We find c_A is close to the 1-loop tadpole-improved perturbative value. In addition, scaling of the pseudoscalar decay constant and renormalised quark mass is improved compared to that obtained using the (larger) c_A values obtained by the ALPHA collaboration.

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