Limit on the b→u coupling from semileptonic B decay

A. Chen, M. Goldberg, N. Horwitz, A. Jawahery, P. Lipari, G. C. Moneti, C. G. Trahern, H. Van Hecke, M. S. Alam, S. E. Csorna, L. Garren, M. D. Mestayer, R. S. Panvini, Xia Yi, P. Avery, C. Bebek, K. Berkelman, D. G. Cassel, J. W. Dewire, R. EhrlichT. Ferguson, R. Galik, M. G.D. Gilchriese, B. Gittelman, M. Halling, D. L. Hartill, S. Holzner, M. Ito, J. Kandaswamy, D. L. Kreinick, Y. Kubota, N. B. Mistry, F. Morrow, E. Nordberg, M. Ogg, A. Silverman, P. C. Stein, S. Stone, D. Weber, R. Wilcke, A. J. Sadoff, R. Giles, J. Hassard, M. Hempstead, K. Kinoshita, W. W. MacKay, F. M. Pipkin, Richard Wilson, P. Haas, T. Jensen, H. Kagan, R. Kass, S. Behrends, K. Chadwick, J. Chauveau, T. Gentile, Jan M. Guida, Joan A. Guida, A. C. Melissinos, S. L. Olsen, G. Parkhurst, D. Peterson, R. Poling, C. Rosenfeld, E. H. Thorndike, P. Tipton, D. Besson, J. Green, R. G. Hicks, R. Namjoshi, F. Sannes, P. Skubic, A. Snyder, R. Stone

Research output: Contribution to journalArticle

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Abstract

We have used the momentum spectrum of leptons produced in semileptonic B-meson decays to set a 90%-confidence-level upper limit on Γ(b→ ulν)Γ(b→clν) of 4%. We also measure the semileptonic branching fractions of the B meson to be (12.0±0.7±0.5)% for electrons and (10.8±0.6±1.0)% for muons.

Original languageEnglish (US)
Pages (from-to)1084-1088
Number of pages5
JournalPhysical Review Letters
Volume52
Issue number13
DOIs
StatePublished - 1984

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Chen, A., Goldberg, M., Horwitz, N., Jawahery, A., Lipari, P., Moneti, G. C., Trahern, C. G., Van Hecke, H., Alam, M. S., Csorna, S. E., Garren, L., Mestayer, M. D., Panvini, R. S., Yi, X., Avery, P., Bebek, C., Berkelman, K., Cassel, D. G., Dewire, J. W., ... Stone, R. (1984). Limit on the b→u coupling from semileptonic B decay. Physical Review Letters, 52(13), 1084-1088. https://doi.org/10.1103/PhysRevLett.52.1084