Phys. Rev. Lett.
79,
3125–3129
(1997)
Observation of Exclusive B Decays to Final States Containing a Charmed Baryon
X. Fu et al. (CLEO Collaboration)
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X. Fu1, B. Nemati1, S. J. Richichi1, W. R. Ross1, P. Skubic1, M. Wood1, M. Bishai2, J. Fast2, E. Gerndt2, J. W. Hinson2, T. Miao2, D. H. Miller2, M. Modesitt2, E. I. Shibata2, I. P. J. Shipsey2, P. N. Wang2, L. Gibbons3, S. D. Johnson3, Y. Kwon3, S. Roberts3, E. H. Thorndike3, C. P. Jessop4, K. Lingel4, H. Marsiske4, M. L. Perl4, S. F. Schaffner4, R. Wang4, T. E. Coan5, J. Dominick5, V. Fadeyev5, I. Korolkov5, M. Lambrecht5, S. Sanghera5, V. Shelkov5, R. Stroynowski5, I. Volobouev5, G. Wei5, M. Artuso6, A. Efimov6, M. Gao6, M. Goldberg6, D. He6, N. Horwitz6, S. Kopp6, G. C. Moneti6, R. Mountain6, Y. Mukhin6, S. Playfer6, T. Skwarnicki6, S. Stone6, X. Xing6, J. Bartelt7, S. E. Csorna7, V. Jain7, S. Marka7, A. Freyberger8, D. Gibaut8, K. Kinoshita8, P. Pomianowski8, S. Schrenk8, D. Cinabro9, B. Barish10, M. Chadha10, S. Chan10, G. Eigen10, J. S. Miller10, C. O'Grady10, M. Schmidtler10, J. Urheim10, A. J. Weinstein10, F. Würthwein10, D. M. Asner11, M. Athanas11, D. W. Bliss11, W. S. Brower11, G. Masek11, H. P. Paar11, J. Gronberg12, C. M. Korte12, R. Kutschke12, S. Menary12, R. J. Morrison12, S. Nakanishi12, H. N. Nelson12, T. K. Nelson12, C. Qiao12, J. D. Richman12, D. Roberts12, A. Ryd12, H. Tajima12, M. S. Witherell12, R. Balest13, K. Cho13, W. T. Ford13, M. Lohner13, H. Park13, P. Rankin13, J. Roy13, J. G. Smith13, J. P. Alexander14, C. Bebek14, B. E. Berger14, K. Berkelman14, K. Bloom14, D. G. Cassel14, H. A. Cho14, D. M. Coffman14, D. S. Crowcroft14, M. Dickson14, P. S. Drell14, D. J. Dumas14, R. Ehrlich14, R. Elia14, P. Gaidarev14, B. Gittelman14, S. W. Gray14, D. L. Hartill14, B. K. Heltsley14, C. D. Jones14, S. L. Jones14, J. Kandaswamy14, N. Katayama14, P. C. Kim14, D. L. Kreinick14, T. Lee14, Y. Liu14, G. S. Ludwig14, J. Masui14, J. Mevissen14, N. B. Mistry14, C. R. Ng14, E. Nordberg14, J. R. Patterson14, D. Peterson14, D. Riley14, A. Soffer14, C. Ward14, P. Avery15, C. Prescott15, S. Yang15, J. Yelton15, G. Brandenburg16, R. A. Briere16, T. Liu16, M. Saulnier16, R. Wilson16, H. Yamamoto16, T. E. Browder17, F. Li17, J. L. Rodriguez17, T. Bergfeld18, B. I. Eisenstein18, J. Ernst18, G. E. Gladding18, G. D. Gollin18, M. Palmer18, M. Selen18, J. J. Thaler18, K. W. Edwards19a,19b, K. W. McLean19a,19b, M. Ogg19a,19b, A. Bellerive20a,20b, D. I. Britton20a,20b, R. Janicek20a,20b, D. B. MacFarlane20a,20b, P. M. Patel20a,20b, B. Spaan20a,20b, A. J. Sadoff21, R. Ammar22, P. Baringer22, A. Bean22, D. Besson22, D. Coppage22, N. Copty22, R. Davis22, N. Hancock22, S. Kotov22, I. Kravchenko22, N. Kwak22, Y. Kubota23, M. Lattery23, J. K. Nelson23, S. Patton23, R. Poling23, T. Riehle23, V. Savinov23, M. S. Alam24, I. J. Kim24, Z. Ling24, A. H. Mahmood24, J. J. O'Neill24, H. Severini24, C. R. Sun24, S. Timm24, F. Wappler24, J. E. Duboscq25, R. Fulton25, D. Fujino25, K. K. Gan25, K. Honscheid25, H. Kagan25, R. Kass25, J. Lee25, M. Sung25, A. Undrus25, C. White25, R. Wanke25, A. Wolf25, and M. M. Zoeller25 (CLEO Collaboration)
1University of Oklahoma, Norman, Oklahoma 73019
2Purdue University, West Lafayette, Indiana 47907
3University of Rochester, Rochester, New York 14627
4Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
5Southern Methodist University, Dallas, Texas 75275
6Syracuse University, Syracuse, New York 13244
7Vanderbilt University, Nashville, Tennessee 37235
8Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
9Wayne State University, Detroit, Michigan 48202
10California Institute of Technology, Pasadena, California 91125
11University of California, San Diego, La Jolla, California 92093
12University of California, Santa Barbara, California 93106
13University of Colorado, Boulder, Colorado 80309-0390
14Cornell University, Ithaca, New York 14853
15University of Florida, Gainesville, Florida 32611
16Harvard University, Cambridge, Massachusetts 02138
17University of Hawaii at Manoa, Honolulu, Hawaii 96822
18University of Illinois, Champaign-Urbana, Illinois 61801
19aCarleton University, Ottawa, Ontario, Canada K1S 5B6,
19band the Institute of Particle Physics, Montréal, Québec, Canada
20aMcGill University, Montréal, Québec, Canada H3A 2T8,
20band the Institute of Particle Physics, Montréal, Québec, Canada
21Ithaca College, Ithaca, New York 14850
22University of Kansas, Lawrence, Kansas 66045
23University of Minnesota, Minneapolis, Minnesota 55455
24State University of New York at Albany, Albany, New York 12222
25The Ohio State University, Columbus, Ohio 43210
Received 12 July 1996; published in the issue dated 27 October 1997
Using data collected in the region of the ϒ(4S) resonance with the CLEO-II detector, we report on the first observation of exclusive decays of the B meson to final states with a charmed baryon. We have measured the branching fractions B(B-→Λc+p̅ π-) = (0.62-0.20+0.23±0.11±0.10)×10-3 and B(B̅ 0→Λc+p̅ π+π-) = (1.33-0.42+0.46±0.31±0.21)×10-3, where the first error is statistical, the second is systematic, and the third is due to uncertainty in the Λc+ branching fractions. In addition, we report upper limits for final states of the form B̅ →Λc+p̅ (nπ) and Λc+p̅ (nπ)π0, where (nπ) denotes up to four charged pions.
© 1997 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.3125
DOI:
10.1103/PhysRevLett.79.3125
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