Calculation of hyperon axial couplings from lattice QCD

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 Sigma and Xi axial couplings are computed for the first time in lattice QCD. In particular, we find that g(Sigma Sigma)=0.450(21)(stat)(27)(syst) and g(Xi Xi)=-0.277(15)(stat)(19)(syst).