Observation Of An Excited Charmed Baryon Decaying Into Xi(C)(0)Pi(+)

L. Gibbons,S. Johnson,Y. Kwon,S. Roberts,E. Thorndike,C. Jessop,K. Lingel,H. Marsiske,M. Perl,S. Schaffner, R. Wang,T. Coan,J. Dominick,V. Fadeyev, I. Korolkov,M. Lambrecht,S. Sanghera,V. Shelkov, R. Stroynowski, I. Volobouev,G. Wei,M. Artuso,A. Efimov,M. Gao,M. Goldberg, D. He,N. Horwitz,S. Kopp, G. Moneti,R. Mountain, Y. Mukhin,S. Playfer, T. Skwarnicki,S. Stone, X. Xing, J. Bartelt, S. Csorna,V. Jain,S. Marka,A. Freyberger, D. Gibaut,K. Kinoshita,P. Pomianowski,S. Schrenk,D. Cinabro,B. Barish,M. Chadha,S. Chan,G. Eigen,J. Miller,C. O'Grady,M. Schmidtler,J. Urheim,A. Weinstein, F. Würthwein,D. Asner,M. Athanas,D. Bliss, W. Brower, G. Masek, H. Paar, J. Gronberg,C. Korte,R. Kutschke, S. Menary, R. Morrison,S. Nakanishi, H. Nelson, T. Nelson,C. Qiao,J. Richman,D. Roberts, A. Ryd,H. Tajima,M. Witherell,R. Balest,K. Cho,W. Ford, M. Lohner, H. Park,P. Rankin,J. Roy,J. Smith, J. Alexander,C. Bebek,B. Berger,K. Berkelman,K. Bloom,D. Cassel,H. Cho,D. Coffman,D. Crowcroft,M. Dickson, P. Drell, D. Dumas,R. Ehrlich,R. Elia,P. Gaidarev,B. Gittelman, S. Gray,D. Hartill, B. Heltsley,C. Jones,S. Jones,J. Kandaswamy,N. Katayama, P. Kim,D. Kreinick,T. Lee, Y. Liu,G. Ludwig,J. Masui,J. Mevissen,N. Mistry,C. Ng, E. Nordberg,J. Patterson, D. Peterson, D. Riley, A. Soffer,C. Ward, P. Avery, C. Prescott, S. Yang, J. Yelton, G. Brandenburg,R. Briere,T. Liu,M. Saulnier,R. Wilson,H. Yamamoto, T. Browder,F. Li,J. Rodriguez,T. Bergfeld,B. Eisenstein, J. Ernst,G. Gladding, G. Gollin,M. Palmer,M. Selen,J. Thaler, K. Edwards,K. McLean,M. Ogg,A. Bellerive,D. Britton,R. Janicek, D. MacFarlane,P. Patel, B. Spaan,A. Sadoff,R. Ammar, P. Baringer,A. Bean, D. Besson,D. Coppage,N. Copty,R. Davis,N. Hancock,S. Kotov,I. Kravchenko,N. Kwak,Y. Kubota,M. Lattery,J. Nelson,S. Patton,R. Poling,T. Riehle, V. Savinov,M. Alam,I. Kim,Z. Ling,A. Mahmood,J. O'Neill, H. Severini,C. Sun,S. Timm,F. Wappler,J. Duboscq,R. Fulton,D. Fujino, K. Gan,K. Honscheid,H. Kagan, R. Kass, J. Lee,M. Sung, A. Undrus,C. White,R. Wanke, A. Wolf,M. Zoeller,X. Fu,B. Nemati,S. Richichi,W. Ross, P. Skubic,M. Wood,M. Bishai,J. Fast,E. Gerndt,J. Hinson, T. Miao,D. Miller,M. Modesitt, E. Shibata, I. Shipsey, P. Wang

PHYSICAL REVIEW LETTERS(1996)

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摘要
Using data recorded by the CLEO II detector at the Cornell Electron Storage Ring, we report the first observation of an excited charmed baryon decaying into Xi c(0) pi(+). The state has mass difference M(Xi(c)(0) pi(+)) - M(Xi(c)(0)) of 174.3 +/- 0.5 +/- 1.0 MeV/c(2), and a width of <3.1 MeV/c(2) (90% confidence level limit). We identify the new state as the Xi(c)(*+), the isospin partner of the recently discovered Xi(c)(0*).
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