2007/10/31 by Michele Della Morte, Stephan Durr, Stephan Dürr +5 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph
paper · pdf · doi:10.1088/1126-6708/2008/02/078
published as JHEP0802:078,2008 · 20 pages including figures and tables, latex2e, uses JHEP3.cls; version published in JHEP, discussion of the continuum limit extended and references added, final results only minimally affected
openalex publication_date 2008/02/20 · arxiv created 2008/03/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 -0.5 GeV/mPS. At the physical b-quark mass we obtain FBs = 193(7) MeV, where all errors apart from the quenched approximation are included.