Charmed-meson decay constants in three-flavor lattice QCD |
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| Authors: | Aubin C,Bernard C,Detar C,Di Pierro M,Freeland E D,Gottlieb Steven,Heller U M,Hetrick J E,El-Khadra A X,Kronfeld A S,Levkova L,Mackenzie P B,Menscher D,Maresca F,Nobes M,Okamoto M,Renner D,Simone J,Sugar R,Toussaint D,Trottier H D Fermilab Lattice Collaboration MILC Collaboration HPQCD Collaboration |
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| Affiliation: | Physics Department, Columbia University, New York, New York 10027, USA. |
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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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