arXiv:hep-lat/0506030·v2·High Energy Physics — Lattice
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🇺🇸
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.
Comments: note added on recent CLEO measurement; PRL version