Determination of B*B pi coupling in unquenched QCD

Hiroshi Ohki, Hideo Matsufuru, Tetsuya Onogi

The $B^{\ast }B\pi$ coupling is a fundamental parameter of chiral effective Lagrangian with heavy-light mesons and can constrain the chiral behavior of $f_B$, $B_B$ and the $B\to \pi l\nu$ fo…