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Observation of the decay B(0)-->J/psieta |
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| Authors: | Chang M-C Abe K Abe K Adachi I Aihara H Anipko D Arinstein K Aushev T Bakich A M Barberio E Bay A Bedny I Belous K Bitenc U Bizjak I Blyth S Bondar A Bozek A Browder T E Chang P Chao Y Chen A Chen K-F Chen W T Cheon B G Chistov R Choi S-K Choi Y Choi Y K Cole S Dalseno J Danilov M Dash M Drutskoy A Eidelman S Fratina S Gabyshev N Gershon T Go A Gokhroo G Ha H Haba J Hara T Hayasaka K Hazumi M Heffernan D Hokuue T Hoshi Y Hou S Hou W-S Hsiung Y B Iijima T Inami K Ishikawa A Ishino H Itoh R Iwasaki M Iwasaki Y Kaji H Kang J H Kataoka S U Kawai H Kawasaki T Khan H R Kichimi H Kim S K Kim Y J |
| Affiliation: | Department of Physics, Fu Jen Catholic University, Taipei. |
| Abstract: | We report the first observation of B(0)-->J/psieta decay. These results are obtained from a data sample that contains 449 x10(6) BB[over] pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal with a significance of 8.1 sigma and obtain a branching fraction of (9.5+/-1.7(stat)+/-0.8(syst)) x 10(-6). |
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