Observation of a Near-ThresholdωJ/ψMass Enhancement in ExclusiveB→KωJ/ψDecays

S K Choi ,M Iwasaki,H Miyata,N Sato,H Nakazawa,N Tamura,G Majumder,S Cole,O Tajima,T Hara,K Kinoshita,C H Wang,Y Yuan,T Gershon,J S Kang,O Schneider,A M Bakich,Y Ban,S Stanič,S Okuno,S Bahinipati,J Brodzicka,D Žontar,A Chen,D Mohapatra,K Abe,A Yamaguchi,T Uglov,C W Park,M Yamauchi,Y Enari,B Shwartz,F Takasaki,S Fratina,W.-S Hou,N Katayama,M Starič,R Mizuk,A Somov,C C Kuo,X C Tian,D Liventsev,I Adachi,M Nakao,Y Hoshi,L E Piilonen,C Schwanda,S Nishida,Y Choi,H Kawai,R Pestotnik,T Kawasaki,Y.-J Kwon,T Hokuue,H Kichimi,S Villa,S L Olsen,A Matyja,S Korpar,C C Zhang,T Matsumoto,K Trabelsi,M Watanabe,T Okabe,R Chistov,H J Kim,N Soni,P Krokovny,S Ogawa,H R Khan,S U Kataoka,A Kuzmin,T Lesiak,S Eidelman,H Sagawa,H Aihara,T E Browder,S M Kim,S H Lee,D Zürcher,M Bračko,W Ostrowicz,T Sumiyoshi,P Chang,S Hou,K Inami,A Chuvikov,N C Hastings,T Schietinger,I Bedny,G R Moloney,J Dalseno,G Varner,G Gokhroo,Z P Zhang,K Hayasaka,K E Varvell,S Uno,Y Asano,M Dash,L M Zhang,A Bondar,J Zhang,K Miyabayashi,J S Lange,P Križan,O Nitoh,J Li,S Uehara,W T Chen,H Hayashii,N Gabyshev,L Hinz,A Drutskoy,Y Teramoto,I Bizjak,M Hazumi,F Fang,M Danilov,M.-Z Wang,Y Sakai,T Ohshima,A Ishikawa,U Bitenc,W Mitaroff,A Imoto,Y Yusa,B Golob,E Nakano,H Shibuya,N Parslow,K Tamai,J H Kang,T Iijima,Y Iwasaki,S Suzuki,S E Lee,Y Yamashita,M C Chang ,H Pałka ,M Różańska ,B.g Cheon ,Shoji Suzuki ,Y Hsiung ,B Yabsley ,A Bożek ,H X Yang ,S W Lin

doi:10.1103/physrevlett.94.182002

Abstract

We report the observation of a near-threshold enhancement in the omegaJ/psi invariant mass distribution for exclusive B-->KomegaJ/psi decays. The results are obtained from a 253 fb(-1) data sample that contains 275 x 10(6) BB pairs that were collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. The statistical significance of the omegaJ/psi mass enhancement is estimated to be greater than 8sigma.

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