Observation ofχcJRadiative Decays to Light Vector Mesons

J V Bennett,A Powell,J Napolitano,L Fields,R Mountain,D Cronin-Hennessy,J Kandaswamy,R A Briere,B Moziak,R S Galik,C S Park,B Xin,S Blusk,D G Cassel,G Wilkinson,I Karliner,B W Lang,S Stroiney,P Rubin,K Randrianarivony,K W Edwards,A J Sadoff,T K Pedlar,D Hertz,G Tatishvili,D Riley,S Nisar,D L Kreinick,P Naik,T Klein,S Mehrabyan,T Wilksen,G S Adams,K Y Gao,D M Asner,A Lincoln,B K Heltsley,D L Hartill,J Hietala,D Cinabro,H Mahlke-Krüger,J E Duboscq,V Savinov,R Poling,M Dubrovin,J Libby,M R Shepherd,J Insler,Z Metreveli,R Gray,D Mohapatra,D Peterson,B I Eisenstein,E H Thorndike,G Bonvicini,R Ehrlich,R E Mitchell,E J White,S W Gray,N Lowrey,S B Athar,H Muramatsu,Q He,D H Miller,T Skwarnicki,J M Hunt,P U E Onyisi,M Artuso,M Selen,I P J Shipsey,J Yelton,R Patel,X Shi,K M Ecklund,N Sultana,K K Seth,J C Wang,S Dobbs,L M Zhang,S Khalil,A W Scott,F Yang,A Tomaradze,J Li,H Vogel,J Wiss,D Besson,Y Kubota,J Reed,S Stone,P Zweber,J H Rademacker ,James Ledoux ,В Е Кузнецов ,A Rýd ,Jun Ge ,W A Love ,L K Gibbons ,J Alexander ,Jonathan L Rosner ,W Sun ,Dandan Hu ,B J.y Tan ,L M Garcia Martin ,H Méndez ,J R Patterson

doi:10.1103/physrevlett.101.151801

Abstract

Using a total of 2.74 x 10(7) decays of the psi(2S) collected with the CLEO-c detector, we present a study of chi(cJ)-->gammaV, where V=rho(0), omega, phi. The transitions chi(c1)-->gammarho(0 and chi(c1)-->gammaomega are observed with B(chi(c1)-->gammarho(0))=(2.43+/-0.19+/-0.22) x 10(-4) and B(chi(c1)-->gammaomega)=(8.3+/-1.5+/-1.2) x 10(-5). In the chi(c1)-->gammarho(0) transition, the final state meson is dominantly longitudinally polarized. Upper limits on the branching fractions of other chi(cJ) states to light vector mesons are presented.

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