Measurement of χc2 production in two-photon collisions

K Abe,H Shibuya,J Yashima,T Aso,A Ishikawa,V Eiges,Y Ban,T Ohshima,O Schneider,F Handa,T Tsukamoto,S Matsumoto,M Yamauchi,K Sumisawa,H Miyake,P Krokovny,K Senyo,S Uehara,H Hayashii,J Kaneko,J Li,G Varner,K Rybicki,T Hojo,T Tsuboyama,K Miyabayashi,M Peters,G Majumder,T Mori,T Hara,J Brodzicka,N Gabyshev,N Root,S Suzuki,M Akatsu,F Takasaki,H Ozaki,R Kulasiri,A Kuzmin,Y Nagasaka,Z Natkaniec,A Drutskoy,M Bračko,T Takahashi,W Ostrowicz,S Nishida,K Inami,H Sagawa,T Hokuue,R Itoh,Y Asano,P Pakhlov,S Noguchi,K Hoshina,O Nitoh,S Stanič,Y Yusa,A Yamaguchi,Y Enari,T Tomura,S Eidelman,M Danilov,F Mandl,H Miyata,D Žontar,C Fukunaga,T Nozaki,A Garmash,E Won,Y Choi,H Kawai,R.-S Lu,M Tanaka,H Aihara,A Bay,J Macnaughton,K Ueno,D Liventsev,H Kichimi,M Hazumi,T Igaki,Y Yuan,T Okabe,N Katayama,R Seuster,N Kawamura,S Tokuda,Y Sakai,I Higuchi,F Ohno,V Sidorov,T Abe,N Tamura,T Aushev,S Semenov,V Zhilich,Y Teramoto,M Satapathy,S Okuno,H Park,S Schrenk,Byoung Sup Ahn,P Chang,Y Yamashita,T Sumiyoshi,P Kapusta,Y Iwasaki,T Gershon,Y Watanabe,S Uno,S Ogawa,Y Kawakami,Y Hoshi,A Sugiyama,R Guo,G Leder,A Bondar,M Nakao,J Zhang,T Nagamine,M Starič,K Neichi,Y Onuki,T Matsumoto,E Nakano,C Schwanda,K Tamai,T Kawasaki,Y Igarashi,R Chistov,I Adachi,W.-S Hou,V Aulchenko,B Shwartz,H O Kim ,K E Varvell ,H Kim ,Yukiko Yamada ,J W Nam ,A Bożek ,J P Perroud ,Hsuan-Cheng Huang ,L S Peak ,L E Piilonen ,S H Lee ,A M Bakich ,Suneel Kumar ,S K Kim ,C C Wang ,Dong Liu ,Abe R ,D W Kim ,Hideo Iwasaki ,S U Kataoka ,B C.k Casey ,C H Wang ,K S Park ,S K Choi ,S Hou ,H J Kim ,S L Olsen ,M E Sevior ,B G Cheon ,J B Singh ,H Pałka ,T H Kim ,Saburou Saitoh ,H K Jang ,Z P Zhang ,Yasunari Harada ,Y Chào ,M Z Wang ,Haruo Yanai ,B Yabsley ,S N Tovey ,G N Taylor ,E M Heenan ,G R Moloney ,J S Kang ,S K Swain ,S Vahsen ,C W Park ,J H Kang ,Masami Iwamoto ,P K Behera ,E Banaś ,Y J Kwon ,J G Wang

doi:10.1016/s0370-2693(02)02104-4

Measurement of χc2 production in two-photon collisions

K Abe, H Shibuya + Show 186 more

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https://doi.org/10.1016/s0370-2693(02)02104-4

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#State In Two-photon Collisions #Two-photon Collisions + Show 8 more

Abstract
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Abstract

The production of the χ c2 charmonium state in two-photon collisions has been measured with the Belle detector at the KEKB e + e − collider. A clear signal for χ c2 → γJ/ ψ, J/ ψ → ℓ +ℓ − is observed in a 32.6 fb −1 data sample accumulated at center-of-mass energies near 10.6 GeV, and the product of its two-photon decay width and branching fraction is determined to be Γ γ γ ( χ c 2 ) B ( χ c 2 → γ J / ψ ) B ( J / ψ → l + l − ) = 13.5 ± 1.3 ( stat . ) ± 1.1 ( syst . ) eV .

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