Status of the computation of fBs, fBd, xi and g

Abstract

Current status of the computation of the neutral B-meson mixing amplitudes, with particular attention to the heavy-light meson decay constants, is reviewed. The values for these quantities, as well as for the coupling of the pion to the lowest doublet of heavy-light mesons, are given.

Comments: 11 pages, 6 figures, Invited talk at the Workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003 [2 refs.added & a few typos corrected]