Phys. Rev. D 53, R1013 - R1017 (1996)
Observation of the Cabibbo-suppressed charmed baryon decay Λc+→pφ
J. P. Alexander et al.
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J. P. Alexander1, C. Bebek1, B. E. Berger1, K. Berkelman1, K. Bloom1, T. E. Browder1 *, D. G. Cassel1, H. A. Cho1, D. M. Coffman1, D. S. Crowcroft1, M. Dickson1, P. S. Drell1, D. J. Dumas1, R. Ehrlich1, R. Elia1, P. Gaidarev1, M. Garcia-Sciveres1, B. Gittelman1, S. W. Gray1, D. L. Hartill1, B. K. Heltsley1, S. Henderson1, C. D. Jones1, S. L. Jones1, J. Kandaswamy1, N. Katayama1, P. C. Kim1, D. L. Kreinick1, T. Lee1, Y. Liu1, G. S. Ludwig1, J. Masui1, J. Mevissen1, N. B. Mistry1, C. R. Ng1, E. Nordberg1, J. R. Patterson1, D. Peterson1, D. Riley1, A. Soffer1, P. Avery2, A. Freyberger2, K. Lingel2, C. Prescott2, J. Rodriguez2, S. Yang2, J. Yelton2, G. Brandenburg3, D. Cinabro3, T. Liu3, M. Saulnier3, R. Wilson3, H. Yamamoto3, T. Bergfeld4, B. I. Eisenstein4, J. Ernst4, G. E. Gladding4, G. D. Gollin4, M. Palmer4, M. Selen4, J. J. Thaler4, K. W. Edwards5, K. W. McLean5, M. Ogg5, A. Bellerive6, D. I. Britton6, E. R. F. Hyatt6, R. Janicek6, D. B. MacFarlane6, P. M. Patel6, B. Spaan6, A. J. Sadoff7, R. Ammar8, P. Baringer8, A. Bean8, D. Besson8, D. Coppage8, N. Copty8, R. Davis8, N. Hancock8, S. Kotov8, I. Kravchenko8, N. Kwak8, Y. Kubota9, M. Lattery9, M. Momayezi9, J. K. Nelson9, S. Patton9, R. Poling9, V. Savinov9, S. Schrenk9, R. Wang9, M. S. Alam10, I. J. Kim10, Z. Ling10, A. H. Mahmood10, J. J. O'Neill10, H. Severini10, C. R. Sun10, F. Wappler10, G. Crawford11, R. Fulton11, D. Fujino11, K. K. Gan11, K. Honscheid11, H. Kagan11, R. Kass11, J. Lee11, M. Sung11, C. White11, A. Wolf11, M. M. Zoeller11, X. Fu12, B. Nemati12, W. R. Ross12, P. Skubic12, M. Wood12, M. Bishai13, J. Fast13, E. Gerndt13, J. W. Hinson13, T. Miao13, D. H. Miller13, M. Modesitt13, E. I. Shibata13, I. P. J. Shipsey13, P. N. Wang13, L. Gibbons14, S. D. Johnson14, Y. Kwon14, S. Roberts14, E. H. Thorndike14, T. E. Coan15, J. Dominick15, V. Fadeyev15, I. Korolkov15, M. Lambrecht15, S. Sanghera15, V. Shelkov15, T. Skwarnicki15, R. Stroynowski15, I. Volobouev15, G. Wei15, M. Artuso16, M. Gao16, M. Goldberg16, D. He16, N. Horwitz16, S. Kopp16, G. C. Moneti16, R. Mountain16, F. Muheim16, Y. Mukhin16, S. Playfer16, S. Stone16, X. Xing16, J. Bartelt17, S. E. Csorna17, V. Jain17, S. Marka17, D. Gibaut18, K. Kinoshita18, P. Pomianowski18, B. Barish19, M. Chadha19, S. Chan19, D. F. Cowen19, G. Eigen19, J. S. Miller19, C. O'Grady19, J. Urheim19, A. J. Weinstein19, F. Würthwein19, D. M. Asner20, M. Athanas20, D. W. Bliss20, W. S. Brower20, G. Masek20, H. P. Paar20, J. Gronberg21, C. M. Korte21, R. Kutschke21, S. Menary21, R. J. Morrison21, S. Nakanishi21, H. N. Nelson21, T. K. Nelson21, C. Qiao21, J. D. Richman21, D. Roberts21, A. Ryd21, H. Tajima21, M. S. Witherell21, R. Balest22, K. Cho22, W. T. Ford22, M. Lohner22, H. Park22, P. Rankin22, and J. G. Smith22
1Cornell University, Ithaca, New York 14853
2University of Florida, Gainesville, Florida 32611
3Harvard University, Cambridge, Massachusetts 02138
4University of Illinois, Champaign-Urbana, Illinois, 61801
5Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, University of Ottawa Campus, Ottawa, Ontario, Canada K1N 9B4
6McGill University, Montréal, Québec, Canada H3A 2T8 and the Institute of Particle Physics, University of Ottawa Campus, Ottawa, Ontario, Canada K1N 9B4
7Ithaca College, Ithaca, New York 14850
8University of Kansas, Lawrence, Kansas 66045
9University of Minnesota, Minneapolis, Minnesota 55455
10State University of New York at Albany, Albany, New York 12222
11Ohio State University, Columbus, Ohio, 43210
12University of Oklahoma, Norman, Oklahoma 73019
13Purdue University, West Lafayette, Indiana 47907
14University of Rochester, Rochester, New York 14627
15Southern Methodist University, Dallas, Texas 75275
16Syracuse University, Syracuse, New York 13244
17Vanderbilt University, Nashville, Tennessee 37235
18Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061
19California Institute of Technology, Pasadena, California 91125
20University of California, San Diego, La Jolla, California 92093
21University of California, Santa Barbara, California 93106
22University of Colorado, Boulder, Colorado 80309-0390
Received 25 July 1995
We report the observation of the Cabibbo-suppressed decays Λc+→pK-K+ and Λc+→pφ using data collected with the CLEO II detector at CESR. The latter mode, observed for the first time with significant statistics, is of interest as a test of color suppression in charm decays. We have determined the branching ratios for these modes relative to Λc+→pK-π+ and compared our results with theory.
©1996 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevD.53.R1013
DOI: 10.1103/PhysRevD.53.R1013
PACS: 13.30.Eg, 12.39.-x, 14.20.Lq
* Permanent address: University of Hawaii at Manoa.
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