Phys. Rev. Lett.
74,
3534–3537
(1995)
New Decay Modes of the Λc+ Charmed Baryon
R. Ammar et al. CLEO Collaboration
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R. Ammar1, P. Baringer1, A. Bean1, D. Besson1, D. Coppage1, N. Copty1, R. Davis1, N. Hancock1, M. Kelly1, S. Kotov1, I. Kravchenko1, N. Kwak1, H. Lam1, Y. Kubota2, M. Lattery2, M. Momayezi2, J. K. Nelson2, S. Patton2, R. Poling2, V. Savinov2, S. Schrenk2, R. Wang2, M. S. Alam3, I. J. Kim3, Z. Ling3, A. H. Mahmood3, J. J. O'Neill3, H. Severini3, C. R. Sun3, F. Wappler3, G. Crawford4, C. M. Daubenmier4, R. Fulton4, D. Fujino4, K. K. Gan4, K. Honscheid4, H. Kagan4, R. Kass4, J. Lee4, M. Sung4, C. White4, A. Wolf4, M. M. Zoeller4, F. Butler5, X. Fu5, B. Nemati5, W. R. Ross5, P. Skubic5, M. Wood5, M. Bishai6, J. Fast6, E. Gerndt6, J. W. Hinson6, R. L. McIlwain6, T. Miao6, D. H. Miller6, M. Modesitt6, D. Payne6, E. I. Shibata6, I. P. J. Shipsey6, P. N. Wang6, M. Battle7, J. Ernst7, L. Gibbons7, Y. Kwon7, S. Roberts7, E. H. Thorndike7, C. H. Wang7, J. Dominick8, M. Lambrecht8, S. Sanghera8, V. Shelkov8, T. Skwarnicki8, R. Stroynowski8, I. Volobouev8, G. Wei8, P. Zadorozhny8, M. Artuso9, M. Gao9, M. Goldberg9, D. He9, N. Horwitz9, G. C. Moneti9, R. Mountain9, F. Muheim9, Y. Mukhin9, S. Playfer9, Y. Rozen9, S. Stone9, X. Xing9, G. Zhu9, J. Bartelt10, S. E. Csorna10, Z. Egyed10, V. Jain10, D. Gibaut11, K. Kinoshita11, P. Pomianowski11, B. Barish12, M. Chadha12, S. Chan12, D. F. Cowen12, G. Eigen12, J. S. Miller12, C. O'Grady12, J. Urheim12, A. J. Weinstein12, M. Athanas13, W. Brower13, G. Masek13, H. P. Paar13, J. Gronberg14, C. M. Korte14, R. Kutschke14, S. Menary14, R. J. Morrison14, S. Nakanishi14, H. N. Nelson14, T. K. Nelson14, C. Qiao14, J. D. Richman14, A. Ryd14, D. Sperka14, H. Tajima14, M. S. Witherell14, R. Balest15, K. Cho15, W. T. Ford15, D. R. Johnson15, K. Lingel15, M. Lohner15, P. Rankin15, J. G. Smith15, J. P. Alexander16, C. Bebek16, K. Berkelman16, K. Bloom16, T. E. Browder16, D. G. Cassel16, H. A. Cho16, D. M. Coffman16, D. S. Crowcroft16, P. S. Drell16, D. J. Dumas16, R. Ehrlich16, P. Gaidarev16, M. Garcia-Sciveres16, B. Geiser16, B. Gittelman16, S. W. Gray16, D. L. Hartill16, B. K. Heltsley16, S. Henderson16, C. D. Jones16, S. L. Jones16, J. Kandaswamy16, N. Katayama16, P. C. Kim16, D. L. Kreinick16, G. S. Ludwig16, J. Masui16, J. Mevissen16, N. B. Mistry16, C. R. Ng16, E. Nordberg16, J. R. Patterson16, D. Peterson16, D. Riley16, S. Salman16, M. Sapper16, F. Würthwein16, P. Avery17, A. Freyberger17, J. Rodriguez17, S. Yang17, J. Yelton17, D. Cinabro18, T. Liu18, M. Saulnier18, R. Wilson18, H. Yamamoto18, T. Bergfeld19, B. I. Eisenstein19, G. Gollin19, B. Ong19, M. Palmer19, M. Selen19, J. J. Thaler19, K. W. Edwards20, M. Ogg20, A. Bellerive21, D. I. Britton21, E. R. F. Hyatt21, D. B. MacFarlane21, P. M. Patel21, B. Spaan21, and A. J. Sadoff22 (CLEO Collaboration)
1University of Kansas, Lawrence, Kansas 66045
2University of Minnesota, Minneapolis, Minnesota 55455
3State University of New York at Albany, Albany, New York 12222
4The Ohio State University, Columbus, Ohio 43210
5University of Oklahoma, Norman, Oklahoma 73019
6Purdue University, West Lafayette, Indiana 47907
7University of Rochester, Rochester, New York 14627
8Southern Methodist University, Dallas, Texas 75275
9Syracuse University, Syracuse, New York 13244
10Vanderbilt University, Nashville, Tennessee 37235
11Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
12California Institute of Technology, Pasadena, California 91125
13University of California, San Diego, La Jolla, California 92093
14University of California, Santa Barbara, California 93106
15University of Colorado, Boulder, Colorado 80309-0390
16Cornell University, Ithaca, New York 14853
17University of Florida, Gainesville, Florida 32611
18Harvard University, Cambridge, Massachusetts 02138
19University of Illinois, Champaign-Urbana, Illinois 61801
20Carleton University, Ottawa, Ontario, Canada K1S 5B6
and the Institute of Particle Physics, Montréal, Canada
21McGill University, Montréal, Québec, Canada H3A 2T8
and the Institute of Particle Physics, Montréal, Canada
22Ithaca College, Ithaca, New York 14850
Received 10 November 1994; published in the issue dated 1 May 1995
We have observed five new decay modes of the charmed baryon Λc+ using data collected with the CLEO II detector. Four decay modes, Λc+→pK̅ 0η, Ληπ+, Σ+η, and Σ*+η, are first observations of final states with an η meson, while the fifth mode, Λc+→ΛK̅ 0K+, requires the creation of an ss̅ quark pair. We measure the branching fractions of these modes relative to Λc+→pK-π+ to be 0.25±0.04±0.04, 0.35±0.05±0.06, 0.11±0.03±0.02, 0.17±0.04±0.03, and 0.12±0.02±0.02, respectively.
© 1995 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.3534
DOI:
10.1103/PhysRevLett.74.3534
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