Phys. Rev. Lett.
75,
785–789
(1995)
Search for B→ℓν̅ ℓ
M. Artuso et al. (CLEO Collaboration)
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M. Artuso1, M. Gao1, M. Goldberg1, D. He1, N. Horwitz1, G. C. Moneti1, R. Mountain1, F. Muheim1, Y. Mukhin1, S. Playfer1, Y. Rozen1, S. Stone1, X. Xing1, G. Zhu1, J. Bartelt2, S. E. Csorna2, Z. Egyed2, V. Jain2, D. Gibaut3, K. Kinoshita3, P. Pomianowski3, B. Barish4, M. Chadha4, S. Chan4, D. F. Cowen4, G. Eigen4, J. S. Miller4, C. O'Grady4, J. Urheim4, A. J. Weinstein4, F. Würthwein4, D. M. Asner5, M. Athanas5, D. W. Bliss5, W. S. Brower5, G. Masek5, H. P. Paar5, J. Gronberg6, C. M. Korte6, R. Kutschke6, S. Menary6, R. J. Morrison6, S. Nakanishi6, H. N. Nelson6, T. K. Nelson6, C. Qiao6, J. D. Richman6, D. Roberts6, A. Ryd6, H. Tajima6, M. S. Witherell6, R. Balest7, K. Cho7, W. T. Ford7, M. Lohner7, H. Park7, P. Rankin7, J. G. Smith7, J. P. Alexander8, C. Bebek8, B. E. Berger8, K. Berkelman8, K. Bloom8, T. E. Browder8, D. G. Cassel8, H. A. Cho8, D. M. Coffman8, D. S. Crowcroft8, M. Dickson8, P. S. Drell8, D. J. Dumas8, R. Ehrlich8, R. Elia8, P. Gaidarev8, R. S. Galik8, M. Garcia-Sciveres8, B. Gittelman8, S. W. Gray8, D. L. Hartill8, B. K. Heltsley8, S. Henderson8, C. D. Jones8, S. L. Jones8, J. Kandaswamy8, N. Katayama8, P. C. Kim8, D. L. Kreinick8, Y. Liu8, G. S. Ludwig8, J. Masui8, J. Mevissen8, N. B. Mistry8, C. R. Ng8, E. Nordberg8, J. R. Patterson8, D. Peterson8, D. Riley8, A. Soffer8, P. Avery9, A. Freyberger9, K. Lingel9, J. Rodriguez9, S. Yang9, J. Yelton9, G. Brandenburg10, D. Cinabro10, T. Liu10, M. Saulnier10, R. Wilson10, H. Yamamoto10, T. Bergfeld11, B. I. Eisenstein11, J. Ernst11, G. E. Gladding11, G. D. Gollin11, M. Palmer11, M. Selen11, J. J. Thaler11, K. W. Edwards12, K. W. McLean12, M. Ogg12, A. Bellerive13, D. I. Britton13, E. R. F. Hyatt13, R. Janicek13, D. B. MacFarlane13, P. M. Patel13, B. Spaan13, A. J. Sadoff14, R. Ammar15, P. Baringer15, A. Bean15, D. Besson15, D. Coppage15, N. Copty15, R. Davis15, N. Hancock15, M. Kelly15, S. Kotov15, I. Kravchenko15, N. Kwak15, H. Lam15, Y. Kubota16, M. Lattery16, M. Momayezi16, J. K. Nelson16, S. Patton16, R. Poling16, V. Savinov16, S. Schrenk16, R. Wang16, M. S. Alam17, I. J. Kim17, Z. Ling17, A. H. Mahmood17, J. J. O'Neill17, H. Severini17, C. R. Sun17, F. Wappler17, G. Crawford18, R. Fulton18, D. Fujino18, K. K. Gan18, K. Honscheid18, H. Kagan18, R. Kass18, J. Lee18, M. Sung18, C. White18, A. Wolf18, M. M. Zoeller18, X. Fu19, B. Nemati19, W. R. Ross19, P. Skubic19, M. Wood19, M. Bishai20, J. Fast20, E. Gerndt20, J. W. Hinson20, R. L. McIlwain20, T. Miao20, D. H. Miller20, M. Modesitt20, D. Payne20, E.I. Shibata20, I. P. J. Shipsey20, P. N. Wang20, L. Gibbons21, Y. Kwon21, S. Roberts21, E. H. Thorndike21, T. Coan22, J. Dominick22, V. Fadeyev22, I. Korolkov22, M. Lambrecht22, S. Sanghera22, V. Shelkov22, T. Skwarnicki22, R. Stroynowski22, I. Volobouev22, and G. Wei22 (CLEO Collaboration)
1Syracuse University, Syracuse, New York 13244
2Vanderbilt University, Nashville, Tennessee 37235
3Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
4California Institute of Technology, Pasadena, California 91125
5University of California, San Diego, La Jolla, California 92093
6University of California, Santa Barbara, California 93106
7University of Colorado, Boulder, Colorado 80309-0390
8Cornell University, Ithaca, New York 14853
9University of Florida, Gainesville, Florida 32611
10Harvard University, Cambridge, Massachusetts 02138
11University of Illinois, Champaign-Urbana, Illinois 61801
12Carleton University, Ottawa, Ontario, Canada K1S 5B6
and The Institute of Particle Physics, Montréal, Québec, Canada
13McGill University, Montréal, Québec, Canada H3A 2T8
and The Institute of Particle Physics, Montréal, Québec, Canada
14Ithaca College, Ithaca, New York 14850
15University of Kansas, Lawrence, Kansas 66045
16University of Minnesota, Minneapolis, Minnesota 55455
17State University of New York at Albany, Albany, New York 12222
18The Ohio State University, Columbus, Ohio 43210
19University of Oklahoma, Norman, Oklahoma 73019
20Purdue University, West Lafayette, Indiana 47907
21University of Rochester, Rochester, New York 14627
22Southern Methodist University, Dallas, Texas 75275
Received 31 March 1995; published in the issue dated 31 July 1995
We search for the decays B-→ℓ-ν̅ ℓ in a sample of 2.2×106 charged B decays using the CLEO detector. We see no evidence for a signal in any channel and set upper limits on the branching fractions of B(B-→τ-ν̅ τ)<2.2×10-3, B(B-→μ-ν̅ μ)<2.1×10-5, and B(B-→e-ν̅ e)<1.5×10-5 at the 90% confidence level.
© 1995 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.785
DOI:
10.1103/PhysRevLett.75.785
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