Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge

Details Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge

2007-03-14

arxiv.org/abs/hep-lat/0703012v1

Physics

High Energy Physics

High Energy Physics - Lattice

13 pages, 5 figures

Scientific paper

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 $a^2$-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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