Measurement Of E(+)E(-) -> Gamma Chi(Cj) Via Initial State Radiation At Belle

Y L Han,X L Wang, C Z Yuan,C P Shen,Peng Wang,A Abdesselam,I Adachi,H Aihara,S Al Said,D M Asner,T Aushev,V Babu,I Badhrees,V Bansal,V Bhardwaj,J Biswal,A Bozek, M Bracko,A Chen,B G Cheon,R Chistov,K Cho,V Chobanova,S K Choi,D Cinabro,J Dalseno, M Danilov,Z Doležal,A Drutskoy,D Dutta,S Eidelman,H Farhat, J Fast, T Ferber,B G Fulsom,V Gaur,N Gabyshev,A Garmash, D Getzkow,R Gillard,R Glattauer,Y M Goh, P Goldenzweig, B Golob,J Haba, K Hayasaka,H Hayashii,X H He,Takeo Horiguchi,W S Hou,T Iijima,Akira Ishikawa, I Jaegle,D Joffe,K K Joo,H Kichimi,D Y Kim,Ji Hyun Kim,Kyong Tai Kim, S H Kim,Y J Kim,K Kinoshita, B R Ko, P Kodys, P Križan,P Krokovny,P Lewis,L Li Gioi,J Libby,D Liventsev,P Lukin,Michio Masuda, D Matvienko,K Miyabayashi,H Miyata,R Mizuk,A Moll,H K Moon,R Mussa, E Nakano,M Nakao,M Nayak,N K Nisar,S Nishida,S Ogawa, S Okuno,W Ostrowicz,P Pakhlov,G Pakhlova,B K Pal,Hyangkyu Park,T K Pedlar, R Pestotnik, M Petric,L E Piilonen,C Pulvermacher, E Ribežl,M Ritter

PHYSICAL REVIEW D（2015）

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摘要

The process e(+)e(-) -> gamma chi(cJ) (J = 1, 2) is studied via initial state radiation using 980 fb(-1) of data at and around the Gamma(nS) (n = 1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetricenergy e(+)e(-) collider. No significant signal is observed except from psi(2S) decays. Upper limits on the cross sections between root s = 3.80 and 5.56 GeV are determined at the 90% credibility level, which range from a few pb to a few tens of pb. We also set upper limits on the decay rate of the vector charmonium [psi(4040), psi(4160), and psi(4415)] and charmoniumlike [Y(4260), Y(4360), and Y(4660)] states to gamma chi(cJ).

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decay rate

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