Upper limit on flavor-changing neutral-current decays of the b quark

P. Avery, C. Bebek, K. Berkelman, D. G. Cassel, J. W. Dewire, R. Ehrlich, T. 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. NordbergM. 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, A. Chen, M. Goldberg, M. E. Hejazifar, 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

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Abstract

We have searched for flavor-changing neutral-current weak decays of the b quark and find RB(bl+l-X)<0.31% at 90% confidence level. This limit excludes models with the b quark in a left-handed isosinglet. We also place limits on the ratio of the B and B0 semileptonic branching fractions and on B0B0 mixing.

Original languageEnglish (US)
Pages (from-to)1309-1313
Number of pages5
JournalPhysical review letters
Volume53
Issue number14
DOIs
StatePublished - 1984

Bibliographical note

Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.

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