Towards a lattice determination of the $B^{\ast }B\pi$ coupling

G. M. de Divitiis, L. Del Debbio, M. Di Pierro +4

The coupling $g_{B^{\ast }B\pi }$ is related to the form factor at zero momentum of the axial current between $B^{\ast }$- and $B$-states. This form factor is evaluated on the lattice usi…