Semileptonic decays of B mesons

K. Chadwick, J. Chauveau, P. Ganci, T. Gentile, Joan A. Guida, R. Kass, A. C. Melissinos, S. L. Olsen, R. Poling, C. Rosenfeld, G. Rucinski, E. H. Thorndike, J. Green, J. J. Mueller, F. Sannes, P. Skubic, A. Snyder, R. Stone, A. Brody, A. ChenM. Goldberg, N. Horwitz, H. Kooy, G. C. Moneti, P. Pistilli, M. S. Alam, S. E. Csorna, A. Fridman, R. Hicks, R. S. Panvini, D. Andrews, P. Avery, R. Cabenda, D. G. Cassel, J. S. Dewire, R. Ehrlich, T. Ferguson, M. G.D. Gilchriese, B. Gittelman, D. L. Hartill, D. Herrup, M. Herzlinger, J. Kandaswamy, D. L. Kreinick, N. B. Mistry, F. Morrow, E. Nordberg, R. Perchonok, R. Plunkett, A. Silverman, P. C. Stein, S. Stone, D. Weber, R. Wilcke, C. Bebek, J. Haggerty, M. Hempstead, J. M. Izen, W. A. Loomis, W. W. MacKay, F. M. Pipkin, J. Rohlf, W. Tanenbaum, Richard Wilson, A. J. Sadoff, H. Kagan

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39 Scopus citations


We have studied the production of B mesons in e+e- annihilations and present new measurements of the semileptonic branching fractions for B-meson decay. We find B(B=eX)=0.127±0.017±0.013 and B(B=X)=0.122±0.017±0.031, where the errors are statistical and systematic, respectively. The observed lepton momentum spectra from B decays are presented. From these spectra we find the mean hadronic mass (MX) recoiling against the detected lepton to be MX=2.2±0.2 GeV/c2. We have also observed an enhancement in the lepton yield from the continuum above BB» threshold. This enhancement is interpreted as continuum B production and is consistent with what is expected from the naive quark model.

Original languageEnglish (US)
Pages (from-to)475-485
Number of pages11
JournalPhysical Review D
Issue number3
StatePublished - 1983

Bibliographical note

Funding Information:
• This research was supported by the UK Science and Engineering Research Council under grants GR/G 32779 and GR/J 21347. I thank my colleagues from the UKQCD Collaboration and G. Martlnelli for fruitful discussions.


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