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arXiv · hep-lat/0506030

Charmed meson decay constants in three-flavor lattice QCD

C. Aubin·C. Bernard·C. DeTar·M. Di Pierro·E. D. Freeland·Steven Gottlieb·U. M. Heller·J. E. Hetrick·A. X. El-Khadra·A. S. Kronfeld·L. Levkova·P. B. Mackenzie·D. Menscher·F. Maresca·M. Nobes·M. Okamoto·D. Renner·J. Simone·R. Sugar·D. Toussaint·H. D. Trottier
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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_{D_s} = 249 +/- 3 +/- 16 MeV for the D_s meson.

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C. Aubin, C. Bernard, C. DeTar, M. Di Pierro, E. D. Freeland, Steven Gottlieb, U. M. Heller, J. E. Hetrick, A. X. El-Khadra, A. S. Kronfeld, L. Levkova, P. B. Mackenzie, D. Menscher, F. Maresca, M. Nobes, M. Okamoto, D. Renner, J. Simone, R. Sugar, D. Toussaint, H. D. Trottier. 2005-09-08. Charmed meson decay constants in three-flavor lattice QCD. https://doi.org/10.1103/physrevlett.95.122002

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