Study of exclusive charmless semileptonic B decays and extraction of |Vub| at CLEO

D. M. Asner, K. W. Edwards, R. A. Briere, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, 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. HertzC. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, T. O. Meyer, P. U.E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, M. Selen, E. J. White, J. Wiss, R. E. Mitchell, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, K. M. Ecklund, H. Severini, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P.J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, D. Hu, B. Moziak, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike

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13 Citations (Scopus)

Abstract

We have studied semileptonic B decay to the exclusive charmless states π, ρ/ω, η and η′ using the full 15.5fb-1 CLEO Υ(4S) sample, with measurements performed in subregions of phase space to minimize dependence on a priori knowledge of the form factors involved. We find total branching fractions B(B0→π-+ν)=(1.37±0.15stat±0. 11sys)×10-4 and B(B0→ρ-+ν)=(2.93±0.37stat±0. 37sys)×10-4. We find evidence for B+→η′+ν, with B(B+→η′+ν)=(2.66±±0.80stat±0.56sys) ×10-4 and 1.20×10-4<B(B+→η′+ν)<4. 46×10-4 (90% CL). We also limit B(B+→η+ν)<1.01×10-4 (90% CL). By combining our B→πν information with unquenched lattice calculations, we find |Vub|=(3.6±0.4stat±0.2sys-0.4thy+0.6) ×10-3.

Original languageEnglish
Article number012007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume76
Issue number1
DOIs
Publication statusPublished - 31 Jul 2007
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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