First Calculation of Hyperon Axial Couplings from Lattice QCD

Details First Calculation of Hyperon Axial Couplings from Lattice QCD First Calculation of Hyperon Axial Couplings from Lattice QCD

2007-12-07

arxiv.org/abs/0712.1214v1

Phys.Rev.D79:034507,2009

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 2 figures

Scientific paper

10.1103/PhysRevD.79.034507

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 $g_{\Sigma\Sigma} = 0.450(21)_{\rm stat}(27)_{\rm syst}$ and $g_{\Xi\Xi} = -0.277(15)_{\rm stat}(19)_{\rm syst}$.

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