arXiv:hep-lat/0410030·v1·High Energy Physics — Lattice
Leptonic decay constants f_Ds and f_D in three flavor lattice QCD
J.N. Simone · C. Aubin · C. Bernard · C. DeTar · M. di Pierro · A.X. El-Khadra · Steven Gottlieb · E.B. Gregory · U.M. Heller · J.E. Hetrick · A.S. Kronfeld · P.B. Mackenzie
Abstract
We determine the leptonic decay constants in three flavor unquenched lattice QCD. We use O(a^2)-improved staggered light quarks and O(a)-improved charm quarks in the Fermilab heavy quark formalism. Our preliminary results, based upon an analysis at a single lattice spacing, are f_Ds = 263(+5-9)(+/-24) MeV and f_D = 225(+11-13)(+/-21) MeV. In each case, the first reported error is statistical while the is the combined systematic uncertainty.
Comments: Talk presented at Lattice2004(heavy), Fermilab, June 21-26, 2004. 3 pages, 2 figures