We explore the transitions $B(0^{+})$ to $B\pi$ and $B_s(0^{+})$ to $BK$ from lattice QCD with $N_f=2$ flavors of sea quark, using the static approximation for the heavy quark. We evaluate the effective coupling constants, predicting a $B(0^{+})$ to $B\pi$ width of around 160 MeV. Our result for the coupling strength adds to the evidence that the $B_s(0^{+})$ meson is not predominantly a molecular state ($BK$).

• Received 21 April 2004

DOI:https://doi.org/10.1103/PhysRevD.70.054501