1203.3600 (William Detmold et al.)

Axial couplings of heavy hadrons from domain-wall lattice QCD    [PDF]

William Detmold, C. -J. David Lin, Stefan Meinel

We calculate matrix elements of the axial current for static-light mesons and baryons in lattice QCD with dynamical domain wall fermions. We use partially quenched heavy hadron chiral perturbation theory in a finite volume to extract the axial couplings g_1, g_2, and g_3 from the data. These axial couplings allow the prediction of strong decay rates and enter chiral extrapolations of most lattice results in the b sector. Our calculations are performed with two lattice spacings and with pion masses down to 227 MeV.

View original: http://arxiv.org/abs/1203.3600