Phys. Rev. D
57,
6604–6608
(1998)
Study of semileptonic decays of B mesons to charmed baryons
G. Bonvicini et al. (CLEO Collaboration)
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G. Bonvicini1, D. Cinabro1, R. Greene1, L. P. Perera1, G. J. Zhou1, M. Chadha2, S. Chan2, G. Eigen2, J. S. Miller2, C. O’Grady2, M. Schmidtler2, J. Urheim2, A. J. Weinstein2, F. Würthwein2, D. W. Bliss3, G. Masek3, H. P. Paar3, S. Prell3, V. Sharma3, D. M. Asner4, J. Gronberg4, T. S. Hill4, D. J. Lange4, R. J. Morrison4, H. N. Nelson4, T. K. Nelson4, D. Roberts4, A. Ryd4, R. Balest5, B. H. Behrens5, W. T. Ford5, H. Park5, J. Roy5, J. G. Smith5, J. P. Alexander6, R. Baker6, C. Bebek6, B. E. Berger6, K. Berkelman6, K. Bloom6, V. Boisvert6, D. G. Cassel6, D. S. Crowcroft6, M. Dickson6, S. von Dombrowski6, P. S. Drell6, K. M. Ecklund6, R. Ehrlich6, A. D. Foland6, P. Gaidarev6, L. Gibbons6, B. Gittelman6, S. W. Gray6, D. L. Hartill6, B. K. Heltsley6, P. I. Hopman6, J. Kandaswamy6, P. C. Kim6, D. L. Kreinick6, T. Lee6, Y. Liu6, N. B. Mistry6, C. R. Ng6, E. Nordberg6, M. Ogg6,*, J. R. Patterson6, D. Peterson6, D. Riley6, A. Soffer6, B. Valant-Spaight6, C. Ward6, M. Athanas7, P. Avery7, C. D. Jones7, M. Lohner7, S. Patton7, C. Prescott7, J. Yelton7, J. Zheng7, G. Brandenburg8, R. A. Briere8, A. Ershov8, Y. S. Gao8, D. Y.-J. Kim8, R. Wilson8, H. Yamamoto8, T. E. Browder9, Y. Li9, J. L. Rodriguez9, T. Bergfeld10, B. I. Eisenstein10, J. Ernst10, G. E. Gladding10, G. D. Gollin10, R. M. Hans10, E. Johnson10, I. Karliner10, M. A. Marsh10, M. Palmer10, M. Selen10, J. J. Thaler10, K. W. Edwards11, A. Bellerive12, R. Janicek12, D. B. MacFarlane12, P. M. Patel12, A. J. Sadoff13, R. Ammar14, P. Baringer14, A. Bean14, D. Besson14, D. Coppage14, C. Darling14, R. Davis14, S. Kotov14, I. Kravchenko14, N. Kwak14, L. Zhou14, S. Anderson15, Y. Kubota15, S. J. Lee15, J. J. O’Neill15, R. Poling15, T. Riehle15, A. Smith15, M. S. Alam16, S. B. Athar16, Z. Ling16, A. H. Mahmood16, S. Timm16, F. Wappler16, A. Anastassov17, J. E. Duboscq17, D. Fujino17,†, K. K. Gan17, T. Hart17, K. Honscheid17, H. Kagan17, R. Kass17, J. Lee17, M. B. Spencer17, M. Sung17, A. Undrus17,‡, R. Wanke17, A. Wolf17, M. M. Zoeller17, B. Nemati18, S. J. Richichi18, W. R. Ross18, H. Severini18, P. Skubic18, M. Bishai19, J. Fast19, J. W. Hinson19, N. Menon19, D. H. Miller19, E. I. Shibata19, I. P. J. Shipsey19, M. Yurko19, S. Glenn20, S. D. Johnson20, Y. Kwon20,§, S. Roberts20, E. H. Thorndike20, C. P. Jessop21, K. Lingel21, H. Marsiske21, M. L. Perl21, V. Savinov21, D. Ugolini21, R. Wang21, X. Zhou21, T. E. Coan22, V. Fadeyev22, I. Korolkov22, Y. Maravin22, I. Narsky22, V. Shelkov22, J. Staeck22, R. Stroynowski22, I. Volobouev22, J. Ye22, M. Artuso23, F. Azfar23, A. Efimov23, M. Goldberg23, D. He23, S. Kopp23, G. C. Moneti23, R. Mountain23, S. Schuh23, T. Skwarnicki23, S. Stone23, G. Viehhauser23, X. Xing23, J. Bartelt24, S. E. Csorna24, V. Jain24,**, K. W. McLean24, S. Marka24, R. Godang25, K. Kinoshita25, I. C. Lai25, P. Pomianowski25, and S. Schrenk25 (CLEO Collaboration)
1Wayne State University, Detroit, Michigan 48202
2California Institute of Technology, Pasadena, California 91125
3University of California, San Diego, La Jolla, California 92093
4University of California, Santa Barbara, California 93106
5University of Colorado, Boulder, Colorado 80309-0390
6Cornell University, Ithaca, New York 14853
7University of Florida, Gainesville, Florida 32611
8Harvard University, Cambridge, Massachusetts 02138
9University of Hawaii at Manoa, Honolulu, Hawaii 96822
10University of Illinois, Urbana-Champaign, Illinois 61801
11Carleton University, Ottawa, Ontario, Canada K1S 5B6the Institute of Particle Physics, Canada
12McGill University, Montréal, Québec, Canada H3A 2T8the Institute of Particle Physics, Canada
13Ithaca College, Ithaca, New York 14850
14University of Kansas, Lawrence, Kansas 66045
15University of Minnesota, Minneapolis, Minnesota 55455
16State University of New York at Albany, Albany, New York 12222
17Ohio State University, Columbus, Ohio 43210
18University of Oklahoma, Norman, Oklahoma 73019
19Purdue University, West Lafayette, Indiana 47907
20University of Rochester, Rochester, New York 14627
21Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
22Southern Methodist University, Dallas, Texas 75275
23Syracuse University, Syracuse, New York 13244
24Vanderbilt University, Nashville, Tennessee 37235
25Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
Received 2 December 1997; published in the issue dated 1 June 1998
Using data collected by the CLEO II detector at a center-of-mass energy on or near the Υ(4S) resonance, we have determined the 90% confidence level upper limit B(B̅ →Λc+e-X)/B(B̅ →(Λc+ or Λ̅ c-)X)<0.05 for electrons with momentum above 0.6GeV/c. We have also obtained the limit B(B-→Λc+p̅ e-ν̅ e)/B(B̅ →Λc+p̅ X)<0.04 at the 90% confidence level and measured the ratio B(B̅ →Λc+p̅ X)/B(B̅ →(Λc+ or Λ̅ c-)X)=0.57±0.05±0.05.
© 1998 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.57.6604
DOI:
10.1103/PhysRevD.57.6604
*Permanent address: University of Texas, Austin TX 78712. †Permanent address: Lawrence Livermore National Laboratory, Livermore, CA 94551. ‡Permanent address: BINP, RU-630090 Novosibirsk, Russia. §Permanent address: Yonsei University, Seoul 120-749, Korea. **Permanent address: Brookhaven National Laboratory, Upton, NY 11973.
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