Charmed meson decay constants in three-flavor lattice QCD

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

2005-06-28

arxiv.org/abs/hep-lat/0506030v2

Phys.Rev.Lett.95:122002,2005

Physics

High Energy Physics

High Energy Physics - Lattice

note added on recent CLEO measurement; PRL version

Scientific paper

10.1103/PhysRevLett.95.122002

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_{D_s} = 249 +/- 3 +/- 16 MeV for the D_s meson.

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