Phys. Rev. Lett. 95, 122002 (2005) [5 pages]Charmed-Meson Decay Constants in Three-Flavor Lattice QCDReceived 28 June 2005; published 14 September 2005 We present the first lattice QCD calculation with realistic sea quark content of the D+-meson decay constant fD+. 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 fD+=201±3±17 MeV, where the errors are statistical and a combination of systematic errors. We also obtain fDs=249±3±16 MeV for the Ds meson. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.122002
DOI:
10.1103/PhysRevLett.95.122002
PACS:
12.38.Gc, 13.20.Fc
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