Leptonic decay constants f_Ds and f_D in three flavor lattice QCD

Details Leptonic decay constants f_Ds and f_D in three flavor lattice QCD Leptonic decay constants f_Ds and f_D in three flavor lattice QCD

2004-10-20

arxiv.org/abs/hep-lat/0410030v1

Nucl.Phys.Proc.Suppl.140:443-445,2005

Physics

High Energy Physics

High Energy Physics - Lattice

Talk presented at Lattice2004(heavy), Fermilab, June 21-26, 2004. 3 pages, 2 figures

Scientific paper

10.1016/j.nuclphysbps.2004.11.24

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.

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