A HIGH STATISTICS LATTICE CALCULATION OF HEAVY-LIGHT MESON DECAY CONSTANTS

Authors
ALLTON CR CONTI L CRISAFULLI M GUISTI L MARTINELLI G RAPUANO F
Citation
Cr. Allton et al., A HIGH STATISTICS LATTICE CALCULATION OF HEAVY-LIGHT MESON DECAY CONSTANTS, Physics letters. Section B, 405(1-2), 1997, pp. 133-141
Citations number
30
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
405
Issue
1-2
Year of publication
1997
Pages
133 - 141
Database
ISI
SICI code
0370-2693(1997)405:1-2<133:AHSLCO>2.0.ZU;2-Y
Abstract
We present a high statistics study of the D- and B-meson decay constan ts. The results were obtained by using the Clover and Wilson lattice a ctions at two different values of the lattice spacing a, corresponding to beta = 6.0 and 6.2. After a careful analysis of the systematic err ors present in the extraction of the physical results, by assuming qui te conservative discretization errors, we find f(Ds) = 237 +/- 16 MeV, f(D) = 221 +/- 17 MeV (f(Ds)/f(D) = 1.07(4)), f(Bs) = 205 +/- 35 MeV, f(B) = 180 +/- 32 MeV (f(Bs)/f(B) = 1.14(8)), in good agreement with previous estimates. (C) 1997 Elsevier Science B.V.