Charmed-meson decay constants in three-flavor lattice QCD.
Phys Rev Lett
; 95(12): 122002, 2005 Sep 16.
Article
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| MEDLINE
| ID: mdl-16197067
ABSTRACT
We present the first lattice QCD calculation with realistic sea quark content of the D+-meson decay constant f(D+). We use the MILC Collaboration's publicly available ensembles of lattice gauge fields, which have a quark sea with two flavors (up and down) much lighter than a third (strange). We obtain f(D+)=201+/-3+/-17 MeV, where the errors are statistical and a combination of systematic errors. We also obtain f(Ds)=249+/-3+/-16 MeV for the Ds meson.