Phys. Rev. Lett.
74,
3113–3117
(1995)
First Observation of the Decay Ξc+→Ξ0e+νe and an Estimate of the Ξc+ Ξc0 Lifetime Ratio
J. P. Alexander et al. CLEO Collaboration
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J. P. Alexander1, C. Bebek1, K. Berkelman1, K. Bloom1, T. E. Browder1, D. G. Cassel1, H. A. Cho1, D. M. Coffman1, D. S. Crowcroft1, P. S. Drell1, D. Dumas1, R. Ehrlich1, P. Gaidarev1, M. Garcia-Sciveres1, B. Geiser1, 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, G. S. Ludwig1, J. Masui1, J. Mevissen1, N. B. Mistry1, C. R. Ng1, E. Nordberg1, J. R. Patterson1, D. Peterson1, D. Riley1, S. Salman1, M. Sapper1, F. Würthwein1, P. Avery2, A. Freyberger2, J. Rodriguez2, S. Yang2, J. Yelton2, D. Cinabro3, T. Liu3, M. Saulnier3, R. Wilson3, H. Yamamoto3, T. Bergfeld4, B. I. Eisenstein4, G. Gollin4, B. Ong4, M. Palmer4, M. Selen4, J. J. Thaler4, K. W. Edwards5, M. Ogg5, A. Bellerive6, D. I. Britton6, E. R. F. Hyatt6, 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, M. Kelly8, S. Kotov8, I. Kravchenko8, N. Kwak8, H. Lam8, 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, C. M. Daubenmier11, R. Fulton11, D. Fujino11, K. K. Gan11, K. Honscheid11, H. Kagan11, R. Kass11, J. Lee11, R. Malchow11, Y. Skovpen11, M. Sung11, C. White11, M. M. Zoeller11, F. Butler12, X. Fu12, B. Nemati12, W. R. Ross12, P. Skubic12, M. Wood12, M. Bishai13, J. Fast13, E. Gerndt13, R. L. McIlwain13, T. Miao13, D. H. Miller13, M. Modesitt13, D. Payne13, E. I. Shibata13, I. P. J. Shipsey13, P. N. Wang13, M. Battle14, J. Ernst14, L. Gibbons14, Y. Kwon14, S. Roberts14, E. H. Thorndike14, C. H. Wang14, J. Dominick15, M. Lambrecht15, S. Sanghera15, V. Shelkov15, T. Skwarnicki15, R. Stroynowski15, I. Volobouev15, G. Wei15, P. Zadorozhny15, M. Artuso16, M. Gao16, M. Goldberg16, D. He16, N. Horwitz16, G. C. Moneti16, R. Mountain16, F. Muheim16, Y. Mukhin16, S. Playfer16, Y. Rozen16, S. Stone16, X. Xing16, G. Zhu16, J. Bartelt17, S. E. Csorna17, Z. Egyed17, V. Jain17, 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, M. Athanas20, W. Brower20, G. Masek20, H. P. Paar20, J. Gronberg21, R. Kutschke21, S. Menary21, R. J. Morrison21, S. Nakanishi21, H. N. Nelson21, T. K. Nelson21, C. Qiao21, J. D. Richman21, A. Ryd21, H. Tajima21, D. Sperka21, M. S. Witherell21, R. Balest22, K. Cho22, W. T. Ford22, D. R. Johnson22, K. Lingel22, M. Lohner22, P. Rankin22, and J. G. Smith22 (CLEO Collaboration)
1Cornell University, Ithaca, New York 14853
2University of Florida, Gainesville, Florida 32611
3Harvard University, Cambridge, Massachusetts 02138
4University of Illinois, Champaign-Urbana, Illinois 61801
5Institute of Particle Physics, Carleton University, Ottawa, Ontario, Canada K1S 5B6
6Institute of Particle Physics, McGill University, Montréal, Québec, Canada H3A 2T8
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
11The Ohio 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
See Also:
Erratum
Received 12 October 1994; published in the issue dated 17 April 1995
Using the CLEO II detector at the Cornell Electron Storage Ring we have observed the decay modes Ξc+→Ξ0e+νe and Ξc0→Ξ-e+νe by the detection of a Ξ-positron pair of appropriate invariant mass. We find B(Ξc+→Ξ0e+νe)σ(e+e-→Ξc+X) = 1.55±0.33±0.25 pb, B(Ξc0→Ξ-e+νe)σ(e+e-→Ξc0X) = 0.63±0.12±0.10 pb, B(Ξc+→Ξ-π+π+)/B(Ξc+→Ξ0e+νe) = 0.44±0.11-0.06+0.11, and B(Ξc0→Ξ-π+)/B(Ξc0→Ξ-e+νe) = 0.32±0.10-0.03+0.05. Assuming the Ξc+ and Ξc0 are equally produced in e+e- annihilation events at 10 GeV, the lifetime ratio of Ξc+/Ξc0 is measured to be 2.46±0.70-0.23+0.33.
© 1995 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.3113
DOI:
10.1103/PhysRevLett.74.3113
See Also
Erratum:
J. P. Alexander et al. (CLEO Collaboration),
First Observation of Ξc+→Ξ0e+νe and an Estimate of the Ξc+/Ξc0 Lifetime Ratio,
Phys. Rev. Lett. 75, 4155 (1995).
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