New measurement of exclusive decays of the χc0 and χc2 to two-meson final states

D. M. Asner, K. W. Edwards,J. Reed,A. N. Robichaud,G. Tatishvili, R. A. Briere,H. Vogel,P. U. E. Onyisi,J. L. Rosner,J. P. Alexander,D. G. Cassel,J. E. Duboscq,R. Ehrlich,R. S. Galik, L. Gibbons,R. Gray,S. W. Gray,D. L. Hartill, B. K. Heltsley,D. Hertz,J. M. Hunt,J. Kandaswamy,D. L. Kreinick,V. E. Kuznetsov,J. Ledoux,H. Mahlke-Kruger, D. Mohapatra,J. R. Patterson, D. Peterson, D. Riley, A. Ryd,A. J. Sadoff, X. Shi,S. Stroiney, W. M. Sun,T. Wilksen,S. B. Athar, J. Yelton,P. Rubin,S. Mehrabyan, N. Lowrey,M. Selen,E. J. White,J. Wiss,R. E. Mitchell,M. R. Shepherd,D. Besson,T. K. Pedlar, D. Cronin-Hennessy,K. Y. Gao,J. Hietala,Y. Kubota,T. Klein,R. Poling,A. W. Scott,P. Zweber,S. Dobbs,Z. Metreveli,K. K. Seth,B. J. Y. Tan, A. Tomaradze,J. Libby,L. Martin,A. Powell, G. Wilkinson,H. Mendez,J. Y. Ge,D. H. Miller, V. Pavlunin,B. Sanghi, I. P. J. Shipsey,B. Xin, G. S. Adams,D. Hu,J. Napolitano,K. M. Ecklund,J. Insler,H. Muramatsu,E. H. Thorndike, F. Yang,M. Artuso,S. Blusk, S. Khalil,J. Li, K. Randrianarivony,N. Sultana, T. Skwarnicki,J. C. Wang,L. M. Zhang, G. Bonvicini,D. Cinabro, M. Dubrovin,A. Lincoln,P. Naik,J. Rademacker,G. Bonvicini,D. Cinabro, M. Dubrovin,A. Lincoln,P. Naik,J. Rademacker

PHYSICAL REVIEW D（2009）

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摘要

Using a sample of 2.59x10(7) psi(2S) decays collected by the CLEO-c detector, we present results of a study of chi(c0) and chi(c2) decays into two-meson final states. We present the world's most precise measurements of the chi(cJ,(J=0,2))->pi(+)pi(-), pi(0)pi(0), K+K-, (KSKS0)-K-0, eta eta, and eta(')eta(') branching fractions, and a search for chi(c) decays into eta eta('). These results shed light on the mechanism of charmonium decays into pseudoscalar mesons.

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