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, C., Conti, L., Crisafulli, M., Giusti, L., Martinelli, G., Rapuano, F. (1997). A high statistics lattice calculation of heavy-light meson decay constants. PHYSICS LETTERS. SECTION B, 405(1-2), 133-141 [10.1016/S0370-2693(97)00580-7].

A high statistics lattice calculation of heavy-light meson decay constants

GIUSTI, LEONARDO;RAPUANO, FEDERICO
1997

Abstract

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.
Articolo in rivista - Articolo scientifico
B decays, lattice, QCD
English
1997
405
1-2
133
141
none
Allton, C., Conti, L., Crisafulli, M., Giusti, L., Martinelli, G., Rapuano, F. (1997). A high statistics lattice calculation of heavy-light meson decay constants. PHYSICS LETTERS. SECTION B, 405(1-2), 133-141 [10.1016/S0370-2693(97)00580-7].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/24716
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