Radiative decays of the Υ ( 1 S ) to a pair of charged hadrons

S E Csorna,G Bonvicini,D Cinabro,M S Dubrovin,A Bornheim,S P Pappas,A J Weinstein,R A Briere,G P Chen,Jin Chen,T Ferguson,G Tatishvili,R Ehrlich,L Fields,R S Galik, L Gibbons,B Gittelman,R Gray,S W Gray,H Vogel,M E Watkins,Jonathan L Rosner,N Adam, J P Alexander, K Berkelman, D G Cassel,V Crede,J E Duboscq,K M Ecklund,D L Hartill, B K Heltsley,D Hertz, C D Jones, J Kandaswamy,D L Kreinick,V E Kuznetsov, H Mahlkekruger, T O Meyer,P Naik,N Lowrey,P U E Onyisi,J R Patterson, D Peterson, E A Phillips, J Pivarski,D Riley, A Ryd,A J Sadoff, H Schwarthoff,Xiaobin Shi,M R Shepherd,S Stroiney,W M Sun, D Urner,T Wilksen, K M Weaver,D Kim,I Karliner,G D Gollin, B I Eisenstein, C Cawlfield, P Rubin,M Weinberger,K Y Gao,D T Gong,J Hietala,Y Kubota,T Klein,B W Lang,Stan Z Li,R Poling,A W Scott,A J S Smith,S Dobbs,Z Metreveli, K K Seth,A Tomaradze,P Zweber,J Ernst,J Ramirez, G S Huang,D H Miller,V Pavlunin,B Sanghi, I P J Shipsey, G S Adams, M Cravey,J P Cummings, J Yelton, H Stoeck,V Potlia, Radhika J Patel,L Brevanewell, P Avery,S B Athar, C Sedlack,M Selen,E J White,John V Williams,J Wiss,D M Asner, K W Edwards, I Danko,J Napolitano, Qiwei He,H Muramatsu, C S Park,E H Thorndike,T E Coan,K Arms, H Severini, S A Dytman,W A Love,S Mehrabyan,J Mueller,V P Savinov,Zhaoling Li,A Lopez,Hector Mendez,Y S Gao, Fang Liu, R Stroynowski,M Artuso, C Boulahouache,S Blusk,J Butt,O Dorjkhaidav, Jiangjie Li,N Menaa,R Mountain,R Nandakumar, K Randrianarivony,D Besson, T K Pedlar, D Croninhennessy,R Redjimi,R Sia, T Skwarnicki,S Stone,J C Wang, Kai Zhang

Physical Review D（2006）

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摘要

Using data obtained with the CLEO III detector, running at the Cornell Electron Storage Ring (CESR), we report on a new study of exclusive radiative Υ(1S) decays into the final states γπ^+π^-, γK^+K^-, and γpp . We present branching ratio measurements for the decay modes Υ(1S)→γf_2(1270), Υ(1S)→γf′_2(1525), and Υ(1S)→γK^+K^-; helicity production ratios for f_2(1270) and f′_2(1525); upper limits for the decay Υ(1S)→γf_J(2200), with f_J(2220)→π^+π^-, K^+K^-, pp ; and an upper limit for the decay Υ(1S)→γX(1860), with X(1860)→γpp .

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elementary particles

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