Study of charmonia in four-meson final states produced in two-photon collisions

S Uehara,E Nakano,Y Yamashita,I Tikhomirov,Y Usov,H Shibuya,H Park,S Okuno,H Ozaki,B Shwartz,Y Choi,H Nakazawa,P Križan,S Korpar,G Gokhroo,S Villa,M Starič,K Vervink,F Takasaki,H Miyata,A Somov,T Ohshima,S Uno,T Tsuboyama,U Bitenc,R Itoh,D Epifanov,D Heffernan,A Ishikawa,A Bay,Y Miyazaki,A Drutskoy,B Golob,M Iwasaki,S Ogawa,A Vinokurova,T Lesiak,T Hokuue,R Mizuk,K Inami,P Chang,R Seidl,Y Watanabe,N Gabyshev,H Stoeck,H Kawai,K Tamai,P Pakhlov,J Dalseno,T Aushev,P Krokovny,Y Hoshi,E Won,A Chen,T Sumiyoshi,Y Iwasaki,Y Sakai,F Mandl,A Yamaguchi,K Ikado,S Fratina,K Hayasaka,A Kuzmin,H Ha,H Miyake,Y Teramoto,N Soni,S Mconie,O Nitoh,S Eidelman,J Haba,D Liventsev,I Adachi,M Dash,H Sahoo,T Kawasaki,Y Onuki,K Belous,M Nakao,S Nishida,T Matsumoto,A Matyja,M Bračko,A Zupanc,R Pestotnik,K Senyo,H Kichimi,M Shapkin,H Hayashii,O Schneider,T Iijima,Z Natkaniec,G Pakhlova,V Aulchenko,C C Kuo ,H Aihara,L S Peak ,S W Lin ,A Bondar,G N Taylor ,A Bożek ,S E Lee ,P Wang,W T Chen ,K F Chen ,Y Chào ,I S Cho ,J S Lee ,A M Bakich ,Y.-J Kwon,T Medvedeva,X C Tian ,J Brodzicka,H J Hyun ,M Hazumi,A Sokolov,C Z Yuan ,V Balagura,W.-S Hou,R Kumar,D H Kah ,Hiroshi Kaji ,J B Singh ,C W Park ,J Li,Y J Kim ,E L Barberio ,H O Kim ,Y Unno,B Yabsley ,B G Cheon ,M Tanaka,J H Kang ,A Limosani,V Zhilich,S K Kim ,Y Liu,S L Olsen ,L E Piilonen ,Y Nagasaka,H Pałka ,S Stanič,P Urquijo,Z P Zhang ,G Varner,T E Browder ,J G Shiu ,M E Sevior ,M J Lee ,C C Zhang ,C H Wang

doi:10.1140/epjc/s10052-007-0451-z

Abstract

We report measurements of charmonia produced in two-photon collisions and decaying to four-meson final states, where the meson is either a charged pion or a charged kaon. The analysis is based on a 395 fb-1 data sample accumulated with the Belle detector at the KEKB electron–positron collider. We observe signals for the three C-even charmonia ηc(1S), χc0(1P) and χc2(1P) in the π+π-π+π-, K+K-π+π- and K+K-K+K- decay modes. No clear signals for ηc(2S) production are found in these decay modes. We have also studied resonant structures in charmonium decays to two-body intermediate meson resonances. We report the products of the two-photon decay width and the branching fractions, \(\Gamma_{\gamma\gamma}\mathcal{B}\), for each of the charmonium decay modes.

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