Speaker
Dr
Benoit Blossier
(CNRS)
Description
It is common to use the Heavy Meson Chiral Perturbation Theory to modelise the transitions involving heavy mesons and soft pions. The corresponding effective Lagrangian has few couplings: one of them is g_B*Bpi parameterising the transition between B, B* and a soft pion. As the process B* --> B pi is forbidden kinematically, the coupling is not accessible to experiment and has to be determined non perturbatively.
In this talk I will present a recent extraction of that coupling in the static heavy quark limit by means of lattice simulations of QCD in which the effect of Nf=2 dynamical quarks have been taken into account and whose the lattice spacings are sufficiently small to allow a reasonable control on cut-off effects.
Primary author
Dr
Benoit Blossier
(CNRS)
Co-authors
Mr
Benjamin Haas
(Universite Paris XI)
Dr
Damir Becirevic
(CNRS)
Mr
Emmanuel Chang
(Universite Paris XI)
