Phys. Rev. Lett.
83,
3390–3393
(1999)
Evidence of New States Decaying into Ξc*π
J. P. Alexander et al. (CLEO Collaboration)
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J. P. Alexander1, R. Baker1, C. Bebek1, B. E. Berger1, K. Berkelman1, V. Boisvert1, D. G. Cassel1, D. S. Crowcroft1, M. Dickson1, S. von Dombrowski1, P. S. Drell1, K. M. Ecklund1, R. Ehrlich1, A. D. Foland1, P. Gaidarev1, L. Gibbons1, B. Gittelman1, S. W. Gray1, D. L. Hartill1, B. K. Heltsley1, P. I. Hopman1, D. L. Kreinick1, T. Lee1, Y. Liu1, T. O. Meyer1, N. B. Mistry1, C. R. Ng1, E. Nordberg1, M. Ogg1,*, J. R. Patterson1, D. Peterson1, D. Riley1, J. G. Thayer1, P. G. Thies1, B. Valant-Spaight1, A. Warburton1, C. Ward1, M. Athanas2, P. Avery2, C. D. Jones2, M. Lohner2, C. Prescott2, A. I. Rubiera2, J. Yelton2, J. Zheng2, G. Brandenburg3, R. A. Briere3, A. Ershov3, Y. S. Gao3, D. Y.-J. Kim3, R. Wilson3, T. E. Browder4, Y. Li4, J. L. Rodriguez4, H. Yamamoto4, T. Bergfeld5, B. I. Eisenstein5, J. Ernst5, G. E. Gladding5, G. D. Gollin5, R. M. Hans5, E. Johnson5, I. Karliner5, M. A. Marsh5, M. Palmer5, C. Plager5, C. Sedlack5, M. Selen5, J. J. Thaler5, J. Williams5, K. W. Edwards6a,6b, R. Janicek7a,7b, P. M. Patel7a,7b, A. J. Sadoff8, R. Ammar9, P. Baringer9, A. Bean9, D. Besson9, D. Coppage9, R. Davis9, S. Kotov9, I. Kravchenko9, N. Kwak9, X. Zhao9, L. Zhou9, S. Anderson10, V. V. Frolov10, Y. Kubota10, S. J. Lee10, R. Mahapatra10, J. J. O'Neill10, R. Poling10, T. Riehle10, A. Smith10, M. S. Alam11, S. B. Athar11, A. H. Mahmood11, S. Timm11, F. Wappler11, A. Anastassov12, J. E. Duboscq12, K. K. Gan12, C. Gwon12, T. Hart12, K. Honscheid12, H. Kagan12, R. Kass12, J. Lorenc12, H. Schwarthoff12, E. von Toerne12, M. M. Zoeller12, S. J. Richichi13, H. Severini13, P. Skubic13, A. Undrus13, M. Bishai14, S. Chen14, J. Fast14, J. W. Hinson14, J. Lee14, N. Menon14, D. H. Miller14, E. I. Shibata14, I. P. J. Shipsey14, S. Glenn15, Y. Kwon15,†, A. L. Lyon15, E. H. Thorndike15, C. P. Jessop16, K. Lingel16, H. Marsiske16, M. L. Perl16, V. Savinov16, D. Ugolini16, X. Zhou16, T. E. Coan17, V. Fadeyev17, I. Korolkov17, Y. Maravin17, I. Narsky17, R. Stroynowski17, J. Ye17, T. Wlodek17, M. Artuso18, R. Ayad18, E. Dambasuren18, S. Kopp18, G. Majumder18, G. C. Moneti18, R. Mountain18, S. Schuh18, T. Skwarnicki18, S. Stone18, A. Titov18, G. Viehhauser18, J. C. Wang18, S. E. Csorna19, K. W. McLean19, S. Marka19, Z. Xu19, R. Godang20, K. Kinoshita20,‡, I. C. Lai20, P. Pomianowski20, S. Schrenk20, G. Bonvicini21, D. Cinabro21, R. Greene21, L. P. Perera21, G. J. Zhou21, S. Chan22, G. Eigen22, E. Lipeles22, M. Schmidtler22, A. Shapiro22, W. M. Sun22, J. Urheim22, A. J. Weinstein22, F. Würthwein22, D. E. Jaffe23, G. Masek23, H. P. Paar23, E. M. Potter23, S. Prell23, V. Sharma23, D. M. Asner24, A. Eppich24, J. Gronberg24, T. S. Hill24, D. J. Lange24, R. J. Morrison24, H. N. Nelson24, T. K. Nelson24, J. D. Richman24, D. Roberts24, B. H. Behrens25, W. T. Ford25, A. Gritsan25, H. Krieg25, J. Roy25, and J. G. Smith25 (CLEO Collaboration)
1Cornell University, Ithaca, New York 14853
2University of Florida, Gainesville, Florida 32611
3Harvard University, Cambridge, Massachusetts 02138
4University of Hawaii at Manoa, Honolulu, Hawaii 96822
5University of Illinois, Urbana-Champaign, Illinois 61801
6aCarleton University, Ottawa, Ontario, Canada K1S 5B6
6band the Institute of Particle Physics, Canada
7aMcGill University, Montréal, Québec, Canada H3A 2T8
7band the Institute of Particle Physics, Canada
8Ithaca College, Ithaca, New York 14850
9University of Kansas, Lawrence, Kansas 66045
10University of Minnesota, Minneapolis, Minnesota 55455
11State University of New York at Albany, Albany, New York 12222
12The Ohio State University, Columbus, Ohio 43210
13University of Oklahoma, Norman, Oklahoma 73019
14Purdue University, West Lafayette, Indiana 47907
15University of Rochester, Rochester, New York 14627
16Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
17Southern Methodist University, Dallas, Texas 75275
18Syracuse University, Syracuse, New York 13244
19Vanderbilt University, Nashville, Tennessee 37235
20Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
21Wayne State University, Detroit, Michigan 48202
22California Institute of Technology, Pasadena, California 91125
23University of California, San Diego, La Jolla, California 92093
24University of California, Santa Barbara, California 93106
25University of Colorado, Boulder, Colorado 80309-0390
Received 8 June 1999; published in the issue dated 25 October 1999
Using data recorded by the CLEO II detector at the Cornell Electron Storage Ring, we report evidence for two new charmed baryons, one decaying into Ξc+π+π- via an intermediate Ξc*0 and its isospin partner decaying into Ξc0π+π- via an intermediate Ξc*+. We measure the mass differences of the two states to be M(Ξc+π+π-)-M(Ξc+) = 348.6±0.6±1.0 MeV, and M(Ξc0π+π-)-M(Ξc0) = 347.2±0.7±2.0 MeV. We interpret these new states as the JP = 3/2- Ξc1 particles, the charmed-strange analogs of the Λc1+(2625).
© 1999 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3390
DOI:
10.1103/PhysRevLett.83.3390
*Permanent address: University of Texas, Austin, TX 78712. †Permanent address: Yonsei University, Seoul 120-749, Korea. ‡Permanent address: University of Cincinnati, Cincinnati, OH 45221.
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