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Heavy-strange meson decay constants in the continuum limit of quenched QCD

Morte, Michele Della, Dürr, Stephan, Guazzini, Damiano, Sommer, Rainer, Heitger, Jochen and Jüttner, Andreas , The ALPHA Collaboration (2008) Heavy-strange meson decay constants in the continuum limit of quenched QCD. The Journal of High Energy Physics, 2008 (2), 1-28.

Record type: Article

Abstract

We improve a previous quenched result for heavy-light pseudoscalar meson decay constants with the light quark taken to be the strange quark. A finer lattice resolution (a ? 0.05 fm) in the continuum limit extrapolation of the data computed in the static approximation is included. We also give further details concerning the techniques used in order to keep the statistical and systematic errors at large lattice sizes L/a under control. Our final result, obtained by combining these data with determinations of the decay constant for pseudoscalar mesons around the Ds, follows nicely the qualitative expectation of the 1/m-expansion with a (relative) 1/m-term of about ?0.5GeV/mPS. At the physical b-quark mass we obtain FBs = 193(7)MeV, where all errors apart from the quenched approximation are included.

Full text not available from this repository.

Published date: 20 February 2008
Keywords: nonperturbative effects, b-physics, lattice QCD, heavy quarks physics
Organisations: Theoretical Partical Physics Group

Identifiers

Local EPrints ID: 339206
URI: https://eprints.soton.ac.uk/id/eprint/339206
PURE UUID: 699f6d18-88fb-42a8-8052-4d16b3385c98

Catalogue record

Date deposited: 25 May 2012 09:01

Contributors

Author: Michele Della Morte
Author: Stephan Dürr
Author: Damiano Guazzini
Author: Rainer Sommer
Author: Jochen Heitger