Phys. Rev. Lett.
82,
3020–3024
(1999)
First Observation of the Decay B0→D*+D*-
M. Artuso et al. (CLEO Collaboration)
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M. Artuso1, E. Dambasuren1, S. Kopp1, G. C. Moneti1, R. Mountain1, S. Schuh1, T. Skwarnicki1, S. Stone1, A. Titov1, G. Viehhauser1, J. C. Wang1, S. E. Csorna2, K. W. McLean2, S. Marka2, Z. Xu2, R. Godang3, K. Kinoshita3,*, I. C. Lai3, P. Pomianowski3, S. Schrenk3, G. Bonvicini4, D. Cinabro4, R. Greene4, L. P. Perera4, G. J. Zhou4, S. Chan5, G. Eigen5, E. Lipeles5, J. S. Miller5, M. Schmidtler5, A. Shapiro5, W. M. Sun5, J. Urheim5, 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, J. Gronberg7, T. S. Hill7, C. M. Korte7, D. J. Lange7, R. J. Morrison7, H. N. Nelson7, T. K. Nelson7, D. Roberts7, H. Tajima7, B. H. Behrens8, W. T. Ford8, A. Gritsan8, H. Krieg8, J. Roy8, J. G. Smith8, J. P. Alexander9, R. Baker9, C. Bebek9, B. E. Berger9, K. Berkelman9, V. Boisvert9, D. G. Cassel9, D. S. Crowcroft9, M. Dickson9, S. von Dombrowski9, P. S. Drell9, K. M. Ecklund9, R. Ehrlich9, A. D. Foland9, P. Gaidarev9, L. Gibbons9, B. Gittelman9, S. W. Gray9, D. L. Hartill9, B. K. Heltsley9, P. I. Hopman9, J. Kandaswamy9, N. Katayama9, D. L. Kreinick9, T. Lee9, Y. Liu9, N. B. Mistry9, C. R. Ng9, E. Nordberg9, M. Ogg9,†, J. R. Patterson9, D. Peterson9, D. Riley9, A. Soffer9, B. Valant-Spaight9, A. Warburton9, C. Ward9, M. Athanas10, P. Avery10, C. D. Jones10, M. Lohner10, C. Prescott10, A. I. Rubiera10, J. Yelton10, J. Zheng10, G. Brandenburg11, R. A. Briere11, A. Ershov11, Y. S. Gao11, D. Y.-J. Kim11, R. Wilson11, T. E. Browder12, Y. Li12, J. L. Rodriguez12, H. Yamamoto12, T. Bergfeld13, B. I. Eisenstein13, J. Ernst13, G. E. Gladding13, G. D. Gollin13, R. M. Hans13, E. Johnson13, I. Karliner13, M. A. Marsh13, M. Palmer13, M. Selen13, J. J. Thaler13, K. W. Edwards14a,14b, A. Bellerive15a,15b, R. Janicek15a,15b, P. M. Patel15a,15b, A. J. Sadoff16, R. Ammar17, P. Baringer17, A. Bean17, D. Besson17, D. Coppage17, R. Davis17, S. Kotov17, I. Kravchenko17, N. Kwak17, L. Zhou17, S. Anderson18, Y. Kubota18, S. J. Lee18, R. Mahapatra18, J. J. O'Neill18, R. Poling18, T. Riehle18, A. Smith18, M. S. Alam19, S. B. Athar19, Z. Ling19, A. H. Mahmood19, S. Timm19, F. Wappler19, A. Anastassov20, J. E. Duboscq20, K. K. Gan20, C. Gwon20, T. Hart20, K. Honscheid20, H. Kagan20, R. Kass20, J. Lee20, J. Lorenc20, H. Schwarthoff20, A. Wolf20, M. M. Zoeller20, S. J. Richichi21, H. Severini21, P. Skubic21, A. Undrus21, M. Bishai22, S. Chen22, J. Fast22, J. W. Hinson22, N. Menon22, D. H. Miller22, E. I. Shibata22, I. P. J. Shipsey22, S. Glenn23, Y. Kwon23,‡, A. L. Lyon23, S. Roberts23, E. H. Thorndike23, C. P. Jessop24, K. Lingel24, H. Marsiske24, M. L. Perl24, V. Savinov24, D. Ugolini24, X. Zhou24, T. E. Coan25, V. Fadeyev25, I. Korolkov25, Y. Maravin25, I. Narsky25, R. Stroynowski25, J. Ye25, and T. Wlodek25 (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
8University of Colorado, Boulder, Colorado 80309-0390
9Cornell University, Ithaca, New York 14853
10University of Florida, Gainesville, Florida 32611
11Harvard University, Cambridge, Massachusetts 02138
12University of Hawaii at Manoa, Honolulu, Hawaii 96822
13University of Illinois, Urbana-Champaign, Illinois 61801
14aCarleton University, Ottawa, Ontario, Canada K1S 5B6
14band the Institute of Particle Physics, Canada
15aMcGill University, Montréal, Québec, Canada H3A 2T8
15band the Institute of Particle Physics, Canada
16Ithaca College, Ithaca, New York 14850
17University of Kansas, Lawrence, Kansas 66045
18University of Minnesota, Minneapolis, Minnesota 55455
19State University of New York at Albany, Albany, New York 12222
20The Ohio State University, Columbus, Ohio 43210
21University of Oklahoma, Norman, Oklahoma 73019
22Purdue University, West Lafayette, Indiana 47907
23University of Rochester, Rochester, New York 14627
24Stanford Linear Accelerator, Stanford University, Stanford, California 94309
25Southern Methodist University, Dallas, Texas 75275
Received 16 November 1998; published in the issue dated 12 April 1999
We have observed four fully reconstructed B0→D*+D*- candidates in 5.8×106 ϒ(4S)→BB̅ decays recorded with the CLEO detector. The background is estimated to be 0.31±0.10 events. The probability that the background could produce four or more signal candidates with the observed distribution among D*+ and D*- decay modes is 1.1×10-4. The measured decay rate, B(B0→D*+D*-) = [6.2-2.9+4.0(stat)±1.0(syst)]×10-4, is large enough for this decay mode to be of interest for the measurement of a time-dependent CP asymmetry.
© 1999 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.3020
DOI:
10.1103/PhysRevLett.82.3020
*Permanent address: University of Cincinnati, Cincinnati, OH 45221. †Permanent address: University of Texas, Austin, TX 78712. ‡Permanent address: Yonsei University, Seoul 120-749, Korea.
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