Phys. Rev. Lett.
86,
2732–2736
(2001)
First Observation of the Decays B0→D*-pp̅ π+ and B0→D*-pn̅
S. Anderson et al. (CLEO Collaboration)
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S. Anderson1, V. V. Frolov1, Y. Kubota1, S. J. Lee1, R. Mahapatra1, J. J. O'Neill1, R. Poling1, T. Riehle1, A. Smith1, C. J. Stepaniak1, J. Urheim1, S. Ahmed2, M. S. Alam2, S. B. Athar2, L. Jian2, L. Ling2, M. Saleem2, S. Timm2, F. Wappler2, A. Anastassov3, J. E. Duboscq3, E. Eckhart3, K. K. Gan3, C. Gwon3, T. Hart3, K. Honscheid3, D. Hufnagel3, H. Kagan3, R. Kass3, T. K. Pedlar3, H. Schwarthoff3, J. B. Thayer3, E. von Toerne3, M. M. Zoeller3, S. J. Richichi4, H. Severini4, P. Skubic4, A. Undrus4, S. Chen5, J. Fast5, J. W. Hinson5, J. Lee5, D. H. Miller5, E. I. Shibata5, I. P. J. Shipsey5, V. Pavlunin5, D. Cronin-Hennessy6, A. L. Lyon6, E. H. Thorndike6, C. P. Jessop7, H. Marsiske7, M. L. Perl7, V. Savinov7, X. Zhou7, T. E. Coan8, V. Fadeyev8, Y. Maravin8, I. Narsky8, R. Stroynowski8, J. Ye8, T. Wlodek8, M. Artuso9, R. Ayad9, C. Boulahouache9, K. Bukin9, E. Dambasuren9, S. Karamov9, G. Majumder9, G. C. Moneti9, R. Mountain9, S. Schuh9, T. Skwarnicki9, S. Stone9, G. Viehhauser9, J. C. Wang9, A. Wolf9, J. Wu9, S. Kopp10, A. H. Mahmood11, S. E. Csorna12, I. Danko12, K. W. McLean12, Sz. Márka12, Z. Xu12, R. Godang13, K. Kinoshita13,*, I. C. Lai13, S. Schrenk13, G. Bonvicini14, D. Cinabro14, S. McGee14, L. P. Perera14, G. J. Zhou14, E. Lipeles15, S. P. Pappas15, M. Schmidtler15, A. Shapiro15, W. M. Sun15, A. J. Weinstein15, F. Würthwein15,†, D. E. Jaffe16, G. Masek16, H. P. Paar16, E. M. Potter16, S. Prell16, V. Sharma16, D. M. Asner17, A. Eppich17, T. S. Hill17, R. J. Morrison17, R. A. Briere18, G. P. Chen18, B. H. Behrens19, W. T. Ford19, A. Gritsan19, J. Roy19, J. G. Smith19, J. P. Alexander20, R. Baker20, C. Bebek20, B. E. Berger20, K. Berkelman20, F. Blanc20, V. Boisvert20, D. G. Cassel20, M. Dickson20, P. S. Drell20, K. M. Ecklund20, R. Ehrlich20, A. D. Foland20, P. Gaidarev20, L. Gibbons20, B. Gittelman20, S. W. Gray20, D. L. Hartill20, B. K. Heltsley20, P. I. Hopman20, C. D. Jones20, J. Kandaswamy20, D. L. Kreinick20, M. Lohner20, A. Magerkurth20, T. O. Meyer20, N. B. Mistry20, E. Nordberg20, J. R. Patterson20, D. Peterson20, D. Riley20, J. G. Thayer20, D. Urner20, B. Valant-Spaight20, A. Warburton20, P. Avery21, C. Prescott21, A. I. Rubiera21, J. Yelton21, J. Zheng21, G. Brandenburg22, A. Ershov22, Y. S. Gao22, D. Y.-J. Kim22, R. Wilson22, T. E. Browder23, Y. Li23, J. L. Rodriguez23, H. Yamamoto23, T. Bergfeld24, B. I. Eisenstein24, J. Ernst24, G. E. Gladding24, G. D. Gollin24, R. M. Hans24, E. Johnson24, I. Karliner24, M. A. Marsh24, M. Palmer24, C. Plager24, C. Sedlack24, M. Selen24, J. J. Thaler24, J. Williams24, K. W. Edwards25a,25b, R. Janicek26a,26b, P. M. Patel26a,26b, A. J. Sadoff27, R. Ammar28, A. Bean28, D. Besson28, R. Davis28, N. Kwak28, and X. Zhao28 (CLEO Collaboration)
1University of Minnesota, Minneapolis, Minnesota 55455
2State University of New York at Albany, Albany, New York 12222
3Ohio State University, Columbus, Ohio 43210
4University of Oklahoma, Norman, Oklahoma 73019
5Purdue University, West Lafayette, Indiana 47907
6University of Rochester, Rochester, New York 14627
7Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
8Southern Methodist University, Dallas, Texas 75275
9Syracuse University, Syracuse, New York 13244
10University of Texas, Austin, Texas 78712
11University of Texas–Pan American, Edinburg, Texas 78539
12Vanderbilt University, Nashville, Tennessee 37235
13Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
14Wayne State University, Detroit, Michigan 48202
15California Institute of Technology, Pasadena, California 91125
16University of California, San Diego, La Jolla, California 92093
17University of California, Santa Barbara, California 93106
18Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
19University of Colorado, Boulder, Colorado 80309-0390
20Cornell University, Ithaca, New York 14853
21University of Florida, Gainesville, Florida 32611
22Harvard University, Cambridge, Massachusetts 02138
23University of Hawaii at Manoa, Honolulu, Hawaii 96822
24University of Illinois, Urbana-Champaign, Illinois 61801
25aCarleton University, Ottawa, Ontario, Canada K1S 5B6
25band the Institute of Particle Physics, Canada
26aMcGill University, Montréal, Québec, Canada H3A 2T8
26band the Institute of Particle Physics, Canada
27Ithaca College, Ithaca, New York 14850
28University of Kansas, Lawrence, Kansas 66045
Received 5 September 2000; published in the issue dated 26 March 2001
We report the first observation of exclusive decays of the type B→D*NN̅ X, where N is a nucleon. Using a sample of 9.7×106BB̅ pairs collected with the CLEO detector operating at the Cornell Electron Storage Ring, we measure the branching fractions B(B0→D*-pp̅ π+) = (6.5-1.2+1.3±1.0)×10-4 and B(B0→D*-pn̅ ) = (14.5-3.0+3.4±2.7)×10-4. Antineutrons are identified by their annihilation in the CsI electromagnetic calorimeter.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.2732
DOI:
10.1103/PhysRevLett.86.2732
*Permanent address: University of Cincinnati, Cincinnati, Ohio 45221. †Permanent address: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
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