Lattice determination of the coupling

De Divitiis, G, Del Debbio, L, Di Pierro, M, Flynn, JM and Michael, C
(2000) Lattice determination of the coupling. Nuclear Physics B - Proceedings Supplements, 83-84. pp. 277-279.

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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.

Item Type: Article
Additional Information: LTH 462. arXiv Number: arXiv:hep-lat/9909148v1. Available online 23 July 2003. Issue: April 2000.
Uncontrolled Keywords: fermion, lattice field theory, gauge field theory, approximation, quenching, coupling constant, form factor, current, axial, decay constant, numerical calculations, Monte Carlo
Subjects: ?? QC ??
Divisions: Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User: Symplectic Admin
Date Deposited: 27 Nov 2008 11:12
Last Modified: 17 Dec 2022 01:36
DOI: 10.1016/s0920-5632(00)91646-3
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