Semileptonic decays of $D$ mesons in three-flavor lattice QCD

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dc.creatorAubin, C.
dc.creatorBernard, C.
dc.creatorDeTar, C.
dc.creatorDi Pierro, M.
dc.creatorEl-Khadra, A.
dc.creatorGottlieb, Steven
dc.creatorGregory, E. B.
dc.creatorHeller, U. M.
dc.creatorHetrick, J.
dc.creatorKronfeld, A. S.
dc.creatorMackenzie, P. B.
dc.creatorMenscher, D.
dc.creatorNobes, M.
dc.creatorOkamoto, M.
dc.creatorOktay, M. B.
dc.creatorOsborn, J.
dc.creatorSimone, J.
dc.creatorSugar, R.
dc.creatorToussaint, D.
dc.creatorTrottier, H. D.
dc.date2004-08-26
dc.date.accessioned2026-07-07T11:43:29Z
dc.date.available2026-07-07T11:43:29Z
dc.descriptionWe present the first three-flavor lattice QCD calculations for $D\to πlν$ and $D\to K lν$ semileptonic decays. Simulations are carried out using ensembles of unquenched gauge fields generated by the MILC collaboration. With an improved staggered action for light quarks, we are able to simulate at light quark masses down to 1/8 of the strange mass. Consequently, the systematic error from the chiral extrapolation is much smaller than in previous calculations with Wilson-type light quarks. Our results for the form factors at $q^2=0$ are $f_+^{D\toπ}(0)=0.64(3)(6)$ and $f_+^{D\to K}(0) = 0.73(3)(7)$, where the first error is statistical and the second is systematic, added in quadrature. Combining our results with experimental branching ratios, we obtain the CKM matrix elements $|V_{cd}|=0.239(10)(24)(20)$ and $|V_{cs}|=0.969(39)(94)(24)$, where the last errors are from experimental uncertainties.
dc.descriptionFermilab Lattice, MILC, and HPQCD Collaborations; 4 pp
dc.identifierhttps://arxiv.org/abs/hep-ph/0408306
dc.identifierhttp://arxiv.org/abs/hep-ph/0408306
dc.identifierPhys.Rev.Lett.94:011601,2005
dc.identifierdoi:10.1103/PhysRevLett.94.011601
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201258
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Lattice
dc.titleSemileptonic decays of $D$ mesons in three-flavor lattice QCD
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