The nucleon axial charge in full lattice QCD

LHPC collaboration; R. G. Edwards; G. T. Fleming; Ph. Hagler; J. W. Negele; K. Orginos; A. Pochinsky; D. B. Renner; D. G. Richards; W. Schroers

doi:10.1103/PhysRevLett.96.052001

The nucleon axial charge in full lattice QCD

High Energy Physics - Lattice 2008-11-26 v2 High Energy Physics - Phenomenology Nuclear Theory

Authors: LHPC collaboration , R. G. Edwards , G. T. Fleming , Ph. Hagler , J. W. Negele , K. Orginos , A. Pochinsky , D. B. Renner , D. G. Richards , W. Schroers

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Abstract

The nucleon axial charge is calculated as a function of the pion mass in full QCD. Using domain wall valence quarks and improved staggered sea quarks, we present the first calculation with pion masses as light as 354 MeV and volumes as large as (3.5 fm)^3. We show that finite volume effects are small for our volumes and that a constrained fit based on finite volume chiral perturbation theory agrees with experiment within 7% statistical errors.

Keywords

nucleon axial charge lattice QCD domain wall fermions staggered fermions finite volume effects chiral perturbation theory

Cite

@article{arxiv.hep-lat/0510062,
  title  = {The nucleon axial charge in full lattice QCD},
  author = {LHPC collaboration and R. G. Edwards and G. T. Fleming and Ph. Hagler and J. W. Negele and K. Orginos and A. Pochinsky and D. B. Renner and D. G. Richards and W. Schroers},
  journal= {arXiv preprint arXiv:hep-lat/0510062},
  year   = {2008}
}

Comments

4 pages, 2 figures, submitted to Physical Review Letters. Several typos corrected

The nucleon axial charge in full lattice QCD

Abstract

Keywords

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