gB*Bπ-coupling in the static heavy quark limit

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 Nf=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 gˆ=0.44±0.03−0.00+0.07, where the second error is flat (not Gaussian).