Phys. Rev. Lett.
84,
4292–4295
(2000)
Search for the Decay B̅ 0→D*0γ
M. Artuso et al. (CLEO Collaboration)
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M. Artuso1, R. Ayad1, C. Boulahouache1, K. Bukin1, E. Dambasuren1, S. Karamov1, S. Kopp1, G. Majumder1, G. C. Moneti1, R. Mountain1, S. Schuh1, T. Skwarnicki1, S. Stone1, G. Viehhauser1, J. C. Wang1, A. Wolf1, J. Wu1, S. E. Csorna2, I. Danko2, K. W. McLean2, Sz. Márka2, Z. Xu2, R. Godang3, K. Kinoshita3,*, I. C. Lai3, S. Schrenk3, G. Bonvicini4, D. Cinabro4, L. P. Perera4, G. J. Zhou4, G. Eigen5, E. Lipeles5, M. Schmidtler5, A. Shapiro5, W. M. Sun5, A. J. Weinstein5, F. Würthwein5,†, D. E. Jaffe6, G. Masek6, H. P. Paar6, E. M. Potter6, S. Prell6, V. Sharma6, D. M. Asner7, A. Eppich7, T. S. Hill7, D. J. Lange7, R. J. Morrison7, R. A. Briere8, B. H. Behrens9, W. T. Ford9, A. Gritsan9, J. Roy9, J. G. Smith9, J. P. Alexander10, R. Baker10, C. Bebek10, B. E. Berger10, K. Berkelman10, F. Blanc10, V. Boisvert10, D. G. Cassel10, M. Dickson10, P. S. Drell10, K. M. Ecklund10, R. Ehrlich10, A. D. Foland10, P. Gaidarev10, L. Gibbons10, B. Gittelman10, S. W. Gray10, D. L. Hartill10, B. K. Heltsley10, P. I. Hopman10, C. D. Jones10, D. L. Kreinick10, M. Lohner10, A. Magerkurth10, T. O. Meyer10, N. B. Mistry10, E. Nordberg10, J. R. Patterson10, D. Peterson10, D. Riley10, J. G. Thayer10, P. G. Thies10, B. Valant-Spaight10, A. Warburton10, P. Avery11, C. Prescott11, A. I. Rubiera11, J. Yelton11, J. Zheng11, G. Brandenburg12, A. Ershov12, Y. S. Gao12, D. Y.-J. Kim12, R. Wilson12, T. E. Browder13, Y. Li13, J. L. Rodriguez13, H. Yamamoto13, T. Bergfeld14, B. I. Eisenstein14, J. Ernst14, G. E. Gladding14, G. D. Gollin14, R. M. Hans14, E. Johnson14, I. Karliner14, M. A. Marsh14, M. Palmer14, C. Plager14, C. Sedlack14, M. Selen14, J. J. Thaler14, J. Williams14, K. W. Edwards15a,15b, R. Janicek16a,16b, P. M. Patel16a,16b, A. J. Sadoff17, R. Ammar18, A. Bean18, D. Besson18, R. Davis18, N. Kwak18, X. Zhao18, S. Anderson19, V. V. Frolov19, Y. Kubota19, S. J. Lee19, R. Mahapatra19, J. J. O'Neill19, R. Poling19, T. Riehle19, A. Smith19, J. Urheim19, S. Ahmed20, M. S. Alam20, S. B. Athar20, L. Jian20, L. Ling20, A. H. Mahmood20,‡, M. Saleem20, S. Timm20, F. Wappler20, A. Anastassov21, J. E. Duboscq21, K. K. Gan21, C. Gwon21, T. Hart21, K. Honscheid21, D. Hufnagel21, H. Kagan21, R. Kass21, T. K. Pedlar21, H. Schwarthoff21, J. B. Thayer21, E. von Toerne21, M. M. Zoeller21, S. J. Richichi22, H. Severini22, P. Skubic22, A. Undrus22, S. Chen23, J. Fast23, J. W. Hinson23, J. Lee23, N. Menon23, D. H. Miller23, E. I. Shibata23, I. P. J. Shipsey23, V. Pavlunin23, D. Cronin-Hennessy24, Y. Kwon24,§, A. L. Lyon24, E. H. Thorndike24, C. P. Jessop25, H. Marsiske25, M. L. Perl25, V. Savinov25, D. Ugolini25, X. Zhou25, T. E. Coan26, V. Fadeyev26, Y. Maravin26, I. Narsky26, R. Stroynowski26, J. Ye26, and T. Wlodek26 (CLEO Collaboration)
1Syracuse University, Syracuse, New York 13244
2Vanderbilt University, Nashville, Tennessee 37235
3Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
4Wayne State University, Detroit, Michigan 48202
5California Institute of Technology, Pasadena, California 91125
6University of California, San Diego, La Jolla, California 92093
7University of California, Santa Barbara, California 93106
8Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
9University of Colorado, Boulder, Colorado 80309-0390
10Cornell University, Ithaca, New York 14853
11University of Florida, Gainesville, Florida 32611
12Harvard University, Cambridge, Massachusetts 02138
13University of Hawaii at Manoa, Honolulu, Hawaii 96822
14University of Illinois, Urbana-Champaign, Illinois 61801
15aCarleton University, Ottawa, Ontario, Canada K1S 5B6
15band the Institute of Particle Physics, Canada
16aMcGill University, Montréal, Québec, Canada H3A 2T8
16band the Institute of Particle Physics, Canada
17Ithaca College, Ithaca, New York 14850
18University of Kansas, Lawrence, Kansas 66045
19University of Minnesota, Minneapolis, Minnesota 55455
20State University of New York at Albany, Albany, New York 12222
21The Ohio State University, Columbus, Ohio 43210
22University of Oklahoma, Norman, Oklahoma 73019
23Purdue University, West Lafayette, Indiana 47907
24University of Rochester, Rochester, New York 14627
25Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
26Southern Methodist University, Dallas, Texas 75275
Received 3 January 2000; published in the issue dated 8 May 2000
We report results of a search for the rare radiative decay B̅ 0→D*0γ. Using 9.66×106 BB̅ meson pairs collected with the CLEO detector at the Cornell Electron Storage Ring, we set an upper limit on the branching ratio for this decay of 5.0×10-5 at 90% C.L. This provides evidence that the anomalous enhancement is absent in W-exchange processes and that weak radiative B decays are dominated by the short-distance b→sγ mechanism in the standard model.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.4292
DOI:
10.1103/PhysRevLett.84.4292
*Present address: University of Cincinnati, Cincinnati, OH 45221. †Present address: Massachusetts Institute of Technology, Cambridge, MA 02139. ‡Present address: University of Texas–Pan American, Edinburg, TX 78539. §Present address: Yonsei University, Seoul 120-749, Korea.
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