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, William D Toussaint, H. D. Trottier

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Abstract

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)
Volume140
Issue numberSPEC. ISS.
DOIs
StatePublished - Mar 2005

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quantum chromodynamics
decay
systematic errors
form factors
extrapolation
mesons
quarks
matrices
configurations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Okamoto, M., Aubin, C., Bernard, C., DeTar, C., Di Pierro, M., El-Khadra, A. X., ... Trottier, H. D. (2005). Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD. Nuclear Physics B (Proceedings Supplements), 140(SPEC. ISS.), 461-463. https://doi.org/10.1016/j.nuclphysbps.2004.11.151

Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD. / Okamoto, M.; Aubin, C.; Bernard, C.; DeTar, C.; Di Pierro, M.; El-Khadra, A. X.; Gottlieb, Steven; Gregory, E. B.; Heller, U. M.; Hetrick, J.; Kronfeld, A. S.; Mackenzie, P. B.; Menscher, D. P.; Nobes, M.; Oktay, M. B.; Osborn, J.; Simone, J. N.; Sugar, R.; Toussaint, William D; Trottier, H. D.

In: Nuclear Physics B (Proceedings Supplements), Vol. 140, No. SPEC. ISS., 03.2005, p. 461-463.

Research output: Contribution to journalArticle

Okamoto, M, Aubin, C, Bernard, C, DeTar, C, Di Pierro, M, El-Khadra, AX, Gottlieb, S, Gregory, EB, Heller, UM, Hetrick, J, Kronfeld, AS, Mackenzie, PB, Menscher, DP, Nobes, M, Oktay, MB, Osborn, J, Simone, JN, Sugar, R, Toussaint, WD & Trottier, HD 2005, 'Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD', Nuclear Physics B (Proceedings Supplements), vol. 140, no. SPEC. ISS., pp. 461-463. https://doi.org/10.1016/j.nuclphysbps.2004.11.151
Okamoto M, Aubin C, Bernard C, DeTar C, Di Pierro M, El-Khadra AX et al. Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD. Nuclear Physics B (Proceedings Supplements). 2005 Mar;140(SPEC. ISS.):461-463. https://doi.org/10.1016/j.nuclphysbps.2004.11.151
Okamoto, M. ; Aubin, C. ; Bernard, C. ; DeTar, C. ; Di Pierro, M. ; El-Khadra, A. X. ; Gottlieb, Steven ; Gregory, E. B. ; Heller, U. M. ; Hetrick, J. ; Kronfeld, A. S. ; Mackenzie, P. B. ; Menscher, D. P. ; Nobes, M. ; Oktay, M. B. ; Osborn, J. ; Simone, J. N. ; Sugar, R. ; Toussaint, William D ; Trottier, H. D. / Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD. In: Nuclear Physics B (Proceedings Supplements). 2005 ; Vol. 140, No. SPEC. ISS. pp. 461-463.
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AU - Okamoto, M.

AU - Aubin, C.

AU - Bernard, C.

AU - DeTar, C.

AU - Di Pierro, M.

AU - El-Khadra, A. X.

AU - Gottlieb, Steven

AU - Gregory, E. B.

AU - Heller, U. M.

AU - Hetrick, J.

AU - Kronfeld, A. S.

AU - Mackenzie, P. B.

AU - Menscher, D. P.

AU - Nobes, M.

AU - Oktay, M. B.

AU - Osborn, J.

AU - Simone, J. N.

AU - Sugar, R.

AU - Toussaint, William D

AU - Trottier, H. D.

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AB - 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.

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