Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1997-03-03
Phys.Lett. B405 (1997) 133-141
Physics
High Energy Physics
High Energy Physics - Lattice
15 pages, Latex with one postscript figure
Scientific paper
10.1016/S0370-2693(97)00580-7
We present a high statistics study of the D- and B-meson decay constants. The results were obtained by using the Clover and Wilson lattice actions at two different values of the lattice spacing $a$, corresponding to $\beta=6.0$ and 6.2. After a careful analysis of the systematic errors present in the extraction of the physical results, by assuming quite conservative discretization errors, we find $f_{D_s}=237 \pm 16$ MeV, $f_{D} = 221 \pm 17$ MeV ($f_{D_s}/f_D=1.07(4)$), $f_{B_s} = 205 \pm 35$ MeV, $f_{B} = 180 \pm 32$ MeV ($f_{B_s}/f_B=1.14(8)$), in good agreement with previous estimates.
Allton Chris R.
Conti Livia
Crisafulli M.
Giusti Leonardo
Martinelli Gabriele
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