Improved measurements of D meson semileptonic decays to π and K mesons
2009; American Physical Society; Volume: 80; Issue: 3 Linguagem: Inglês
10.1103/physrevd.80.032005
ISSN1550-7998
AutoresD. Besson, T. K. Pedlar, J. Xavier, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, R. Poling, A. W. Scott, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, B. J. Y. Tan, A. Tomaradze, J. Libby, L. M. Garcia Martin, A. Powell, C. Thomas, G. Wilkinson, H. Méndez, Jun Ge, D. H. Miller, I. P. J. Shipsey, B. Xin, G. S. Adams, D. Hu, B. Moziak, J. Napolitano, K. M. Ecklund, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, M. Artuso, S. Blusk, S. Khalil, R. Mountain, K. Randrianarivony, N. Sultana, T. Skwarnicki, S. Stone, J. C. Wang, L. M. Zhang, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, Mark J. Smith, Peng Zhou, J. Zhu, P. Naik, Jonas Rademacker, D. M. Asner, K. W. Edwards, J. Reed, Arianne Robichaud, G. Tatishvili, E. J. White, R. A. Briere, H. Vogel, P. U. E. Onyisi, J. L. Rosner, J. P. Alexander, D. G. Cassel, J. E. Duboscq, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, J. M. Hunt, J. Kandaswamy, D. L. Kreinick, В. Е. Кузнецов, James Ledoux, H. Mahlke-Krüger, J. R. Patterson, D. Peterson, D. Riley, A. Rýd, A. J. Sadoff, X. Shi, S. Stroiney, W. Sun, T. Wilksen, J. Yelton, P. Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, R. E. Mitchell, M. R. Shepherd,
Tópico(s)High-Energy Particle Collisions Research
ResumoUsing the entire CLEO-c \psi(3770)-> D\bar{D} event sample, corresponding to an integrated luminosity of $818 pb^-1 and approximately 5.4 million D\bar{D} events, we present a study of the decays D^0 -> \pi^- e^+ \nu_e, D^0 -> K^- e^+ \nu_e, D^+ -> \pi^0 e^+ \nu_e, and D^+ -> \bar{K}^0 e^+ \nu_e. Via a tagged analysis technique, in which one D is fully reconstructed in a hadronic mode, partial rates for semileptonic decays by the other D are measured in several q^2 bins. We fit these rates using several form factor parameterizations and report the results, including form factor shape parameters and the branching fractions B(D^0 -> \pi^- e^+ \nu_e) = (0.288\pm0.008\pm0.003)%, B(D^0 -> K^- e^+ \nu_e) = (3.50\pm0.03\pm0.04)%, B(D^+ -> \pi^0 e^+ \nu_e) = (0.405\pm0.016\pm0.009)%, and B(D^+ -> \bar{K}^0 e^+ \nu_e) = (8.83\pm0.10\pm0.20)%, where the first uncertainties are statistical and the second are systematic. Taking input from lattice quantum chromodynamics (LQCD), we also find |Vcd| = 0.234\pm0.007\pm0.002\pm0.025 and |Vcs| = 0.985\pm0.009\pm0.006\pm0.103, where the third uncertainties are from LQCD.
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