(bul)/(bcl) from the end point of the lepton momentum spectrum in semileptonic B decay

S. Behrends, Jan M. Guida, Joan A. Guida, F. Morrow, R. Poling, E. H. Thorndike, P. Tipton, M. S. Alam, N. Katayama, I. J. Kim, W. C. Li, X. C. Lou, C. R. Sun, V. Tanikella, D. Bortoletto, A. Chen, M. Goldberg, R. Holmes, N. Horwitz, A. JawaheryP. Lubrano, G. C. Moneti, V. Sharma, I. P.J. Shipsey, P. Thoma, S. E. Csorna, M. D. Mestayer, R. S. Panvini, G. B. Word, A. Bean, G. J. Bobbink, I. C. Brock, A. Engler, T. Ferguson, R. W. Kraemer, C. Rippich, H. Vogel, C. Bebek, K. Berkelman, E. Blucher, D. G. Cassel, T. Copie, R. Desalvo, J. W. Dewire, R. Ehrlich, R. S. Galik, M. G.D. Gilchriese, B. Gittelman, S. W. Gray, A. M. Halling

Research output: Contribution to journalArticlepeer-review

66 Scopus citations


We have used the measured yield of leptons near the end point of the momentum spectrum from semileptonic B decay to obtain an upper limit on (bul)/(bcl) and a corresponding limit on Vub/Vcb.

Original languageEnglish (US)
Pages (from-to)407-410
Number of pages4
JournalPhysical review letters
Issue number4
StatePublished - 1987

Bibliographical note

Funding Information:
The authors are grateful to National Institutes of Health (Grant No. 1 F02 NS-51982-0" Bethesda, Md. U.S.A., and to the Multiple Sclerosis Society of Great Britain and Northern l-for financial support. * Present address: Department of Neurology, Stanford University and Neurol~ Veterans Administration Hospital, 3801 Miranda Avenue, Palo Alto, Calif. 94304, I r * * Present address: The Wellcome Research Laboratories, Langley Court, Beckr 3BS (Great Britain)


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