## Lattice Determination of the $B^\ast B π$ Coupling

Research output: Contribution to journalArticle

### Related Edinburgh Organisations

Original language English 277-279 3 Nuclear Physics B - Proceedings Supplements 83-84 April 2000 10.1016/S0920-5632(00)91646-3 Published - 23 Sep 1999 Proceedings of the XVIIth International Symposium on Lattice Field Theory - Pisa, ItalyDuration: 29 Jun 2009 → 3 Jul 2009

### Abstract

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. Moreover it is related to the effective coupling between heavy mesons and pions that appear the heavy meson chiral Lagrangian. This coupling has been evaluated on the lattice using static heavy quarks and light quark propagators determined by a stochastic inversion of the fermionic bilinear. We found the value $g=0.42(4)(8)$. Beside its theoretical interest, this quantity has phenomenological implications in $B \to \pi + \bar l l$ decays.

• hep-lat

## Proceedings of the XVIIth International Symposium on Lattice Field Theory

29/06/093/07/09

Pisa, Italy

Event: Conference