Observation Of The Decay Omega(0)(C)->Omega(-)E(+)Nu(E)

R. Ammar,D. Besson,X. Zhao,S. Anderson,V. Frolov,Y. Kubota,S. Lee, S. Li,R. Poling,A. Smith,C. Stepaniak,J. Urheim,S. Ahmed,M. Alam, L. Jian,M. Saleem,F. Wappler,E. Eckhart,K. Gan, C. Gwon, T. Hart,K. Honscheid,D. Hufnagel,H. Kagan, R. Kass,T. Pedlar,J. Thayer,E. von Toerne,T. Wilksen,M. Zoeller,H. Muramatsu,S. Richichi, H. Severini, P. Skubic,S. Dytman,S. Nam, V. Savinov, S. Chen,J. Hinson,J. Lee,D. Miller, V. Pavlunin, E. Shibata,I. Shipsey, D. Cronin-Hennessy,A. Lyon,C. Park, W. Park, E. Thorndike,T. Coan, Y. Gao,F. Liu, Y. Maravin,I. Narsky, R. Stroynowski,M. Artuso, C. Boulahouache,K. Bukin,E. Dambasuren,R. Mountain, T. Skwarnicki,S. Stone,J. Wang,A. Mahmood, S. Csorna,I. Danko,Z. Xu,G. Bonvicini,D. Cinabro,M. Dubrovin,S. McGee,A. Bornheim, E. Lipeles,S. Pappas,A. Shapiro,W. Sun,A. Weinstein,G. Masek, H. Paar,R. Mahapatra,R. Briere,G. Chen,T. Ferguson,G. Tatishvili,H. Vogel,N. Adam,J. Alexander,K. Berkelman,F. Blanc, V. Boisvert,D. Cassel, P. Drell,J. Duboscq,K. Ecklund,R. Ehrlich, L. Gibbons,B. Gittelman,S. Gray,D. Hartill, B. Heltsley,L. Hsu,C. Jones,J. Kandaswamy,D. Kreinick,A. Magerkurth,H. Mahlke-Krüger,T. Meyer, N. Mistry,E. Nordberg,J. Patterson,D. Peterson,J. Pivarski,D. Riley,A. Sadoff,H. Schwarthoff,M. Shepherd,J. Thayer,D. Urner, B. Valant-Spaight,G. Viehhauser,A. Warburton,M. Weinberger,S. Athar, P. Avery,L. Breva-Newell,V. Potlia,H. Stoeck, J. Yelton,G. Brandenburg, A. Ershov,D. Kim,R. Wilson, K. Benslama,B. Eisenstein,J. Ernst, G. Gollin,R. Hans,I. Karliner,N. Lowrey,M. Marsh, C. Plager,C. Sedlack,M. Selen,J. Thaler,J. Williams, K. Edwards

PHYSICAL REVIEW LETTERS（2002）

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摘要

Using the CLEO detector at the Cornell Electron Storage Ring we have observed the Omega(c)(0) (css ground state) in the decay Omega(c)(0) --> Omega(-)e(+)nu(e). We find a signal of 11.4 +/- 3.8(stat) events. The probability that we have observed a background fluctuation is 7.6x10(-5). We measure B(Omega(c)(0) --> Omega(-)e(+)nu(e)).sigma(e(+)e(-) --> Omega(c)(0)X) = (42.2 +/- 14.1(stat) +/- 5.7(syst)) fb and R = Gamma(Omega(c)(0)Omega(-)--> pi(+))/Gamma(Omega(c)(0) --> Omega(-)enu(e)) = 00.41 +/- 0.19(stat) +/- 0.04(syst). This is the first statistically significant observation of an individual decay mode of the Omega(c)(0) in e(+)e(-) annihilation and the first example of a baryon decaying via beta emission, where no quarks from the first generation participate in the reaction.

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关键词

statistical significance,ground state

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