In this work, we report the first lattice calculation of hyperon axial couplings, using the 2+1-flavor MILC configurations and domain-wall fermion valence quarks. Both the Σ and Ξ axial couplings are computed for the first time in lattice QCD. In particular we find that gΣΣ=0.450(21)stat(27)syst and gΞΞ=−0.277(15)stat(19)syst.
@article{arxiv.0712.1214,
title = {First Calculation of Hyperon Axial Couplings from Lattice QCD},
author = {Huey-Wen Lin and Konstantinos Orginos},
journal= {arXiv preprint arXiv:0712.1214},
year = {2009}
}