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

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

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High Energy Physics - Lattice

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http://salesiana.dossiersoluciones.com/handle/123456789/38574

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-lat/0109036
 http://arxiv.org/abs/hep-lat/0109036
 Nucl.Phys.Proc.Suppl. 106 (2002) 783-785

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arXiv