title: Charmed-meson decay constants in three-flavor lattice QCD.
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.
authors.affiliation: Physics Department, Columbia University, New York, New York 10027, USA.
authors.forename: C
authors.initials: C
authors.lastname: Aubin
authors.forename: C
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authors.lastname: Bernard
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authors.initials: C
authors.lastname: Detar
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authors.initials: M
authors.lastname: Di Pierro
authors.forename: E D
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authors.lastname: Freeland
authors.forename: Steven
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authors.lastname: Gottlieb
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authors.lastname: Heller
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authors.lastname: Hetrick
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authors.lastname: El-Khadra
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authors.lastname: Kronfeld
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authors.lastname: Levkova
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authors.initials: PB
authors.lastname: Mackenzie
authors.forename: D
authors.initials: D
authors.lastname: Menscher
authors.forename: F
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authors.lastname: Maresca
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authors.lastname: Nobes
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authors.lastname: Okamoto
authors.forename: D
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authors.lastname: Renner
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authors.lastname: Simone
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authors.initials: R
authors.lastname: Sugar
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authors.lastname: Toussaint
authors.forename: H D
authors.initials: HD
authors.lastname: Trottier