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, D.P. Menscher, M. Nobes, M. Okamoto, M.B. Oktay, J., Osborn, R. Sugar, D. Toussaint
TL;DR
This paper reports the calculation of leptonic decay constants f_Ds and f_D in three-flavor unquenched lattice QCD using improved staggered and Fermilab heavy quark formalisms, providing preliminary results with statistical and systematic uncertainties.
Contribution
First determination of leptonic decay constants in three-flavor unquenched lattice QCD using improved actions and Fermilab formalism.
Findings
f_Ds = 263(+5-9)(+/-24) MeV
f_D = 225(+11-13)(+/-21) MeV
Preliminary results with quantified uncertainties.
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.
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