Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD

M. Okamoto, C. Aubin, C. Bernard, C. DeTar, M. Di Pierro, A. X. El-Khadra, Steven Gottlieb, E. B. Gregory, U. M. Heller, J. Hetrick, A. S. Kronfeld, P. B. Mackenzie, D. P. Menscher, M. Nobes, M. B. Oktay, J. Osborn, J. N. Simone, R. Sugar, D. Toussaint, H. D. Trottier

Research output: Contribution to journalArticlepeer-review

172 Scopus citations


We present results for form factors of semileptonic decays of D and B mesons in 2 + 1 flavor lattice QCD using the MILC gauge configurations. With an improved staggered action for light quarks, we successfully reduce the systematic error from the chiral extrapolation. The results for D decays are in agreement with experimental ones. The results for B decays are preliminary. Combining our results with experimental branching ratios, we then obtain the CKM matrix elements Vcd , Vcs , Vcb and Vub . We also check CKM unitarity, for the first time, using only lattice QCD as the theoretical input.

Original languageEnglish (US)
Pages (from-to)461-463
Number of pages3
JournalNuclear Physics B - Proceedings Supplements
Issue numberSPEC. ISS.
StatePublished - Mar 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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