Heavy-light decay constants from relativistic Nf=2,0 QCD

Abstract

We present results on an analysis of the decay constants fB and fBs with two flavours of sea quark. The calculation has been carried out on 3 different bare gauge couplings and 4 sea quark masses at each gauge coupling, with m_pi/m_rho ranging from 0.8 to 0.6. We employ the Fermilab formalism to perform calculations with heavy quarks whose mass is in the range of the b-quark. A comparison with a quenched calculation using the same action is made to elucidate the effects due to the sea quarks.

Contribution to EPS 99, Tampere, Finland. LateX2e file, 2 pages long. Requires hep99 style files (included) and epsf. 3 Encapsulated Postscript figures. (Changed Author list.)