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Phys Rev Lett. 2007 Mar 30;98(13):131803. doi: 10.1103/PhysRevLett.98.131803. Epub 2007 Mar 30.

Observation of the decay B(0)-->J/psieta.

Physical review letters

M-C Chang, K Abe, K Abe, I Adachi, H Aihara, D Anipko, K Arinstein, T Aushev, A M Bakich, E Barberio, A Bay, I Bedny, K Belous, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, T E Browder, P Chang, Y Chao, A Chen, K-F Chen, W T Chen, B G Cheon, R Chistov, S-K Choi, Y Choi, Y K Choi, S Cole, J Dalseno, M Danilov, M Dash, A Drutskoy, S Eidelman, S Fratina, N Gabyshev, T Gershon, A Go, G Gokhroo, H Ha, J Haba, T Hara, K Hayasaka, M Hazumi, D Heffernan, T Hokuue, Y Hoshi, S Hou, W-S Hou, Y B Hsiung, T Iijima, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, Y Iwasaki, H Kaji, J H Kang, S U Kataoka, H Kawai, T Kawasaki, H R Khan, H Kichimi, S K Kim, Y J Kim, K Kinoshita, S Korpar, P Krizan, P Krokovny, R Kulasiri, R Kumar, C C Kuo, A Kuzmin, Y-J Kwon, G Leder, M J Lee, S E Lee, T Lesiak, A Limosani, S-W Lin, G Majumder, F Mandl, T Matsumoto, A Matyja, S McOnie, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, Y Miyazaki, R Mizuk, T Mori, T Nagamine, I Nakamura, E Nakano, M Nakao, S Nishida, O Nitoh, S Noguchi, S Ogawa, T Ohshima, S Okuno, S L Olsen, Y Onuki, H Ozaki, P Pakhlov, G Pakhlova, H Palka, H Park, K S Park, L S Peak, R Pestotnik, L E Piilonen, Y Sakai, N Satoyama, T Schietinger, O Schneider, J Schümann, A J Schwartz, R Seidl, K Senyo, M Shapkin, H Shibuya, B Shwartz, J B Singh, A Somov, N Soni, S Stanic, M Staric, H Stoeck, K Sumisawa, T Sumiyoshi, S Suzuki, O Tajima, F Takasaki, K Tamai, N Tamura, M Tanaka, G N Taylor, Y Teramoto, X C Tian, I Tikhomirov, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, T Uglov, S Uno, P Urquijo, Y Ushiroda, Y Usov, G Varner, K E Varvell, S Villa, C C Wang, C H Wang, M-Z Wang, Y Watanabe, R Wedd, E Won, Q L Xie, A Yamaguchi, Y Yamashita, M Yamauchi, Y Yusa, C C Zhang, L M Zhang, Z P Zhang, A Zupanc,

Affiliations

  1. Department of Physics, Fu Jen Catholic University, Taipei.

PMID: 17501188 DOI: 10.1103/PhysRevLett.98.131803

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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