Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge

2007/03/14 by Fu-Jiun Jiang, Jiang, Fu-Jiun
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #hep-lat

paper · pdf · doi:10.48550/arxiv.hep-lat/0703012

13 pages, 5 figures

arxiv created 2007/03/14 · arxiv updated 2009/12/01

Abstract

We study the nucleon axial charge in the chiral perturbation theory for a mixed lattice action of Ginsparg-Wilson valence quarks and staggered sea quarks. In particular, we investigate the lattice spacing a²-dependence of the neutron to proton axial transition matrix element. By using the known low-energy constants (LEC's) and an estimated value of a new LEC which appears in the calculation, we see a large lattice spacing effect on g_A.

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