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, Sheldon 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

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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
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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