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arXiv · hep-lat/0410030

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·H. D. Trottier·:·The Fermilab Lattice·MILC·HPQCD Collaborations
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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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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, H. D. Trottier, :, The Fermilab Lattice, MILC, HPQCD Collaborations. 2004-10-20. Leptonic decay constants f_Ds and f_D in three flavor lattice QCD. https://doi.org/10.1016/j.nuclphysbps.2004.11.245

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