Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge

Fu-Jiun Jiang

Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge

High Energy Physics - Lattice 2007-05-23 v1

Authors: Fu-Jiun Jiang

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 $a^2$ -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 $g_A$ .

Keywords

nucleon axial charge mixed action chiral perturbation theory Ginsparg-Wilson fermions staggered fermions lattice spacing effects g_A

Cite

@article{arxiv.hep-lat/0703012,
  title  = {Mixed Action Lattice Spacing Effects on the Nucleon Axial Charge},
  author = {Fu-Jiun Jiang},
  journal= {arXiv preprint arXiv:hep-lat/0703012},
  year   = {2007}
}

Comments

13 pages, 5 figures

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