Article

Charmed-meson decay constants in three-flavor lattice QCD.

Physics Department, Columbia University, New York, New York 10027, USA.
Physical Review Letters (Impact Factor: 7.73). 10/2005; 95(12):122002. DOI: 10.1103/PhysRevLett.95.122002
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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.

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