Phys. Rev. Lett.
75,
4364–4368
(1995)
Observation of a Narrow State Decaying into Ξc+π-
P. Avery et al. (CLEO Collaboration)
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P. Avery1, A. Freyberger1, K. Lingel1, C. Prescott1, J. Rodriguez1, S. Yang1, J. Yelton1, G. Brandenburg2, D. Cinabro2, T. Liu2, M. Saulnier2, R. Wilson2, H. Yamamoto2, T. Bergfeld3, B. I. Eisenstein3, J. Ernst3, G. E. Gladding3, G. D. Gollin3, M. Palmer3, M. Selen3, J. J. Thaler3, K. W. Edwards4, K. W. McLean4, M. Ogg4, A. Bellerive5, D. I. Britton5, E. R. F. Hyatt5, R. Janicek5, D. B. MacFarlane5, P. M. Patel5, B. Spaan5, A. J. Sadoff6, R. Ammar7, P. Baringer7, A. Bean7, D. Besson7, D. Coppage7, N. Copty7, R. Davis7, N. Hancock7, S. Kotov7, I. Kravchenko7, N. Kwak7, Y. Kubota8, M. Lattery8, M. Momayezi8, J. K. Nelson8, S. Patton8, R. Poling8, V. Savinov8, S. Schrenk8, R. Wang8, M. S. Alam9, I. J. Kim9, Z. Ling9, A. H. Mahmood9, J. J. O'Neill9, H. Severini9, C. R. Sun9, S. Timm9, F. Wappler9, G. Crawford10, J. E. Duboscq10, R. Fulton10, D. Fujino10, K. K. Gan10, K. Honscheid10, H. Kagan10, R. Kass10, J. Lee10, M. Sung10, C. White10, A. Wolf10, M. M. Zoeller10, X. Fu11, B. Nemati11, W. R. Ross11, P. Skubic11, M. Wood11, M. Bishai12, J. Fast12, E. Gerndt12, J. W. Hinson12, T. Miao12, D. H. Miller12, M. Modesitt12, E. I. Shibata12, I. P. J. Shipsey12, P. N. Wang12, L. Gibbons13, S. D. Johnson13, Y. Kwon13, S. Roberts13, E. H. Thorndike13, T. E. Coan14, J. Dominick14, V. Fadeyev14, I. Korolkov14, M. Lambrecht14, S. Sanghera14, V. Shelkov14, T. Skwarnicki14, R. Stroynowski14, I. Volobouev14, G. Wei14, M. Artuso15, M. Gao15, M. Goldberg15, D. He15, N. Horwitz15, S. Kopp15, G. C. Moneti15, R. Mountain15, F. Muheim15, Y. Mukhin15, S. Playfer15, S. Stone15, X. Xing15, J. Bartelt16, S. E. Csorna16, V. Jain16, S. Marka16, D. Gibaut17, K. Kinoshita17, P. Pomianowski17, B. Barish18, M. Chadha18, S. Chan18, D. F. Cowen18, G. Eigen18, J. S. Miller18, C. O'Grady18, J. Urheim18, A. J. Weinstein18, F. Würthwein18, D. M. Asner19, M. Athanas19, D. W. Bliss19, W. S. Brower19, G. Masek19, H. P. Paar19, J. Gronberg20, C. M. Korte20, R. Kutschke20, S. Menary20, R. J. Morrison20, S. Nakanishi20, H. N. Nelson20, T. K. Nelson20, C. Qiao20, J. D. Richman20, D. Roberts20, A. Ryd20, H. Tajima20, M. S. Witherell20, R. Balest21, K. Cho21, W. T. Ford21, M. Lohner21, H. Park21, P. Rankin21, J. G. Smith21, J. P. Alexander22, C. Bebek22, B. E. Berger22, K. Berkelman22, K. Bloom22, T. E. Browder22,*, D. G. Cassel22, H. A. Cho22, D. M. Coffman22, D. S. Crowcroft22, M. Dickson22, P. S. Drell22, D. J. Dumas22, R. Ehrlich22, R. Elia22, P. Gaidarev22, M. Garcia-Sciveres22, B. Gittelman22, S. W. Gray22, D. L. Hartill22, B. K. Heltsley22, S. Henderson22, C. D. Jones22, S. L. Jones22, J. Kandaswamy22, N. Katayama22, P. C. Kim22, D. L. Kreinick22, T. Lee22, Y. Liu22, G. S. Ludwig22, J. Masui22, J. Mevissen22, N. B. Mistry22, C. R. Ng22, E. Nordberg22, J. R. Patterson22, D. Peterson22, D. Riley22, and A. Soffer22 (CLEO Collaboration)
1University of Florida, Gainesville, Florida 32611
2Harvard University, Cambridge, Massachusetts 02138
3University of Illinois, Champaign-Urbana, Illinois 61801
4Carleton University, Ottawa, Ontario K1S 5B6 and the Institute of Particle Physics of Canada, Montreal, Quebec, Canada
5McGill University, Montréal, Québec H3A 2T8 and the Institute of Particle Physics of Canada, Montreal, Quebec, Canada
6Ithaca College, Ithaca, New York 14850
7University of Kansas, Lawrence, Kansas 66045
8University of Minnesota, Minneapolis, Minnesota 55455
9State University of New York at Albany, Albany, New York 12222
10The Ohio State University, Columbus, Ohio 43210
11University of Oklahoma, Norman, Oklahoma 73019
12Purdue University, West Lafayette, Indiana 47907
13University of Rochester, Rochester, New York 14627
14Southern Methodist University, Dallas, Texas 75275
15Syracuse University, Syracuse, New York 13244
16Vanderbilt University, Nashville, Tennessee 37235
17Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
18California Institute of Technology, Pasadena, California 91125
19University of California, San Diego, La Jolla, California 92093
20University of California, Santa Barbara, California 93106
21University of Colorado, Boulder, Colorado 80309-0390
22Cornell University, Ithaca, New York 14853
Received 15 August 1995; published in the issue dated 11 December 1995
Using data recorded by the CLEO-II detector at Cornell Electron Storage Ring (CESR), we report the first observation of a narrow state decaying into Ξc+π-. The state has mass difference M(Ξc+π-)-M(Ξc+) of 178.2 ± 0.5 ± 1.0 MeV/c2, and a width of <5.5 MeV/c2 (90% confidence level limit). The most likely explanation of this new state is that it is the Ξc*0, the JP=3/2+ spin excitation of the Ξc0 charmed baryon.
© 1995 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.4364
DOI:
10.1103/PhysRevLett.75.4364
PACS:
14.20.Lq, 13.30.Eg, 13.65.+i
*Permanent address: University of Hawaii at Manoa.
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