g(B*Bpi)-coupling in the static heavy quark limit
arXiv:0905.3355 · doi:10.1016/j.physletb.2009.07.031
Abstract
By means of QCD simulations on the lattice, we compute the coupling of the heavy-light mesons to a soft pion in the static heavy quark limit. The gauge field configurations used in this calculations include the effect of N_f=2 dynamical Wilson quarks, while for the static quark propagator we use its improved form (so called HYP). On the basis of our results we obtain that the coupling g=0.44 +/- 0.03 (+0.07/-0.00), where the second error is flat (not gaussian).
7 pages, 3 figs (published version)