Phys. Rev. Lett.
96,
121801
(2006)
[5 pages]
Experimental Limits on Weak Annihilation Contributions to b→ulν Decays
J. L. Rosner et al. CLEO Collaboration
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J. L. Rosner1, N. E. Adam2, J. P. Alexander2, K. Berkelman2, D. G. Cassel2, J. E. Duboscq2, K. M. Ecklund2, R. Ehrlich2, L. Fields2, L. Gibbons2, R. Gray2, S. W. Gray2, D. L. Hartill2, B. K. Heltsley2, D. Hertz2, C. D. Jones2, J. Kandaswamy2, D. L. Kreinick2, V. E. Kuznetsov2, H. Mahlke-Krüger2, T. O. Meyer2, P. U. E. Onyisi2, J. R. Patterson2, D. Peterson2, E. A. Phillips2, J. Pivarski2, D. Riley2, A. Ryd2, A. J. Sadoff2, H. Schwarthoff2, X. Shi2, S. Stroiney2, W. M. Sun2, T. Wilksen2, M. Weinberger2, S. B. Athar3, P. Avery3, L. Breva-Newell3, R. Patel3, V. Potlia3, H. Stoeck3, J. Yelton3, P. Rubin4, C. Cawlfield5, B. I. Eisenstein5, I. Karliner5, D. Kim5, N. Lowrey5, P. Naik5, C. Sedlack5, M. Selen5, J. J. Thaler5, E. J. White5, J. Wiss5, M. R. Shepherd6, D. M. Asner7, K. W. Edwards7, D. Besson8, T. K. Pedlar9, D. Cronin-Hennessy10, K. Y. Gao10, D. T. Gong10, J. Hietala10, Y. Kubota10, T. Klein10, B. W. Lang10, R. Poling10, A. W. Scott10, A. Smith10, S. Dobbs11, Z. Metreveli11, K. K. Seth11, A. Tomaradze11, P. Zweber11, J. Ernst12, K. Arms13, H. Severini14, S. A. Dytman15, W. Love15, S. Mehrabyan15, J. A. Mueller15, V. Savinov15, Z. Li16, A. Lopez16, H. Mendez16, J. Ramirez16, G. S. Huang17, D. H. Miller17, V. Pavlunin17, B. Sanghi17, I. P. J. Shipsey17, G. S. Adams18, M. Anderson18, J. P. Cummings18, I. Danko18, J. Napolitano18, Q. He19, H. Muramatsu19, C. S. Park19, E. H. Thorndike19, T. E. Coan20, Y. S. Gao20, F. Liu20, R. Stroynowski20, M. Artuso21, C. Boulahouache21, S. Blusk21, J. Butt21, J. Li21, N. Menaa21, R. Mountain21, S. Nisar21, K. Randrianarivony21, R. Redjimi21, R. Sia21, T. Skwarnicki21, S. Stone21, J. C. Wang21, K. Zhang21, S. E. Csorna22, G. Bonvicini23, D. Cinabro23, M. Dubrovin23, A. Lincoln23, A. J. Weinstein24, R. A. Briere25, G. P. Chen25, J. Chen25, T. Ferguson25, G. Tatishvili25, H. Vogel25, and M. E. Watkins25 (CLEO Collaboration)
1Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
2Cornell University, Ithaca, New York 14853, USA
3University of Florida, Gainesville, Florida 32611, USA
4George Mason University, Fairfax, Virginia 22030, USA
5University of Illinois, Urbana-Champaign, Illinois 61801, USA
6Indiana University, Bloomington, Indiana 47405, USA
7Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Canada
8University of Kansas, Lawrence, Kansas 66045, USA
9Luther College, Decorah, Iowa 52101, USA
10University of Minnesota, Minneapolis, Minnesota 55455, USA
11Northwestern University, Evanston, Illinois 60208, USA
12State University of New York at Albany, Albany, New York 12222, USA
13Ohio State University, Columbus, Ohio 43210, USA
14University of Oklahoma, Norman, Oklahoma 73019, USA
15University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
16University of Puerto Rico, Mayaguez, Puerto Rico 00681
17Purdue University, West Lafayette, Indiana 47907, USA
18Rensselaer Polytechnic Institute, Troy, New York 12180, USA
19University of Rochester, Rochester, New York 14627, USA
20Southern Methodist University, Dallas, Texas 75275, USA
21Syracuse University, Syracuse, New York 13244, USA
22Vanderbilt University, Nashville, Tennessee 37235, USA
23Wayne State University, Detroit, Michigan 48202, USA
24California Institute of Technology, Pasadena, California 91125, USA
25Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
Received 10 January 2006; published 28 March 2006
We present the first experimental limits on high-q2 contributions to charmless semileptonic B decays of the form expected from the weak annihilation (WA) decay mechanism. Such contributions could bias determinations of |Vub| from inclusive measurements of B→Xulν. Using a wide range of models based on available theoretical input we set a limit of ΓWA/Γb→u<7.4% (90% confidence level) on the WA fraction, and assess the impact on previous inclusive determinations of |Vub|.
© 2006 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.121801
DOI:
10.1103/PhysRevLett.96.121801
PACS:
13.20.He, 12.15.Hh, 12.15.Ji
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