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

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

2001-09-28

arxiv.org/abs/hep-lat/0109036v1

Nucl.Phys.Proc.Suppl. 106 (2002) 783-785

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2001(improvement), 3 pages, 3 postscript figures, espcrc2.sty

Scientific paper

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 $\beta=5.93$ 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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