χc0 and χc2 decays into ηη, ηη′, and η′η′ final states

G. Adams,M. Anderson,J. Cummings,I. Danko,J. Napolitano,Q. He,J. Insler,H. Muramatsu, C. Park,E. Thorndike, F. Yang,T. Coan,Y. Gao,M. Artuso,S. Blusk,J. Butt,J. Li,N. Menaa,R. Mountain,S. Nisar, K. Randrianarivony,R. Sia,T. Skwarnicki,S. Stone,J. Wang, K. Zhang, S. Csorna,G. Bonvicini,D. Cinabro,M. Dubrovin,A. Lincoln,D. Asner, K. Edwards,R. Briere, J. Chen,T. Ferguson,G. Tatishvili,H. Vogel,M. Watkins,J. Rosner,N. Adam, J. Alexander,K. Berkelman,D. Cassel,J. Duboscq,K. Ecklund,R. Ehrlich,L. Fields,R. Galik, L. Gibbons,R. Gray,S. Gray,D. Hartill, B. Heltsley,D. Hertz,C. Jones,J. Kandaswamy,D. Kreinick,V. Kuznetsov,H. Mahlke-Krüger,P. Onyisi,J. Patterson, D. Peterson,J. Pivarski, D. Riley,A. Ryd, A. Sadoff,H. Schwarthoff, X. Shi,S. Stroiney,W. Sun,T. Wilksen,M. Weinberger,S. Athar, R. Patel,V. Potlia, J. Yelton,P. Rubin,C. Cawlfield,B. Eisenstein,I. Karliner,D. Kim, N. Lowrey,P. Naik,C. Sedlack,M. Selen,E. White,J. Wiss, R. Mitchell,M. Shepherd,D. Besson,T. Pedlar,D. Cronin-Hennessy,K. Gao,J. Hietala,Y. Kubota,T. Klein,B. Lang,R. Poling,A. Scott,A. Smith,P. Zweber,S. Dobbs,Z. Metreveli,K. Seth, A. Tomaradze, J. Ernst, H. Severini,S. Dytman,W. Love, V. Savinov,O. Aquines, Z. Li,A. Lopez,S. Mehrabyan,H. Mendez,J. Ramirez, G. Huang,D. Miller, V. Pavlunin,B. Sanghi, I. Shipsey,B. Xin

PHYSICAL REVIEW D（2007）

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摘要

Using a sample of 3x10(6) psi(2S) decays collected by the CLEO III and CLEO-c detector configurations, we present results of a study of chi(c0) and chi(c2) decays into eta eta, eta eta('), and eta(')eta(') final states. We find B(chi(c0)->eta eta)=(0.31 +/- 0.05 +/- 0.04 +/- 0.02)%, B(chi(c0)->eta eta('))< 0.05% at the 90% confidence level, and B(chi(c0)->eta(')eta('))=(0.17 +/- 0.04 +/- 0.02 +/- 0.01)%. We also present upper limits for the decays of chi(c2) into these final states. These results give information on the decay mechanism of chi(c) states into pseudoscalars.

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