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Observation of a Resonancelike Structure in the π^+-Ψ' Mass Distribution in Exclusive B → Kπ^+-Ψ' Decays (2008) |
- Olsen, S. L.,
- Adachi, I.,
- Aihara, H.,
- Aulchenko, V.,
- Aushev, T.,
- Aziz, T.,
- Bakich, A. M.,
- Balagura, V.,
- Bedny, I.,
- Bitenc, U.,
- Schneider, O.,
- Schwartz, A. J.,
- Senyo, K.,
- Shapkin, M.,
- Shen, C. P.,
- Shibuya, H.,
- Shwartz, B.,
- Singh, J. B.,
- Somov, A.,
- Stanic, S.,
- Bondar, A.,
- Staric, M.,
- Sumiyoshi, T.,
- Suzuki, S.Y.,
- Takasaki, F.,
- Tamai, K.,
- Tanaka, M.,
- Teramoto, Y.,
- Tikhomirov, I.,
- Uehara, S.,
- Uglov, T.,
- Bozek, A.,
- Unno, Y.,
- Uno, S.,
- Urquijo, P.,
- Varner, G.,
- Vervink, K.,
- Villa, S.,
- Wang, C. H.,
- Wang, P.,
- Wang, X. L.,
- Bracˇko, M.,
- Watanabe, Y.,
- Wedd, R.,
- Won, E.,
- Yabsley, B. D.,
- Yamashita, Y.,
- Yuan, C. Z.,
- Zhang, Z. P.,
- Zhulanov, V.,
- Zupanc, A.,
- Zyukova, O.,
- Brodzicka, J.,
- Browder, T. E.,
- Chang, P.,
- Chao, Y.,
- Chen, A.,
- Chen, W. T.,
- Cheon, B. G.,
- Chistov, R.,
- Choi, Y.,
- Dalseno, J.,
- Danilov, M.,
- Dash, M.,
- Eidelman, S.,
- Gabyshev, N.,
- Golob, B.,
- Haba, J.,
- Hara, T.,
- Hayasaka, K.,
- Hayashii, H.,
- Hazumi, M.,
- Heffernan, D.,
- Hoshi, Y.,
- Hyun, H. J.,
- Iijima, T.,
- Inami, K.,
- Ishikawa, A.,
- Ishino, H.,
- Itoh, R.,
- Iwasaki, M.,
- Iwasaki, Y.,
- Kah, D. H.,
- Kang, J. H.,
- Katayama, N.,
- Kawai, H.,
- Kawasaki, T.,
- Kichimi, H.,
- Kim, H. O.,
- Kim, S. K.,
- Kim, Y. J.,
- Kinoshita, K.,
- Krizˇan, P.,
- Krokovny, P.,
- Kumar, R.,
- Kuo, C. C.,
- Kuzmin, A.,
- Lange, J. S.,
- Lee, J. S.,
- Lee, M. J.,
- Lee, S. E.,
- Lesiak, T.,
- Limosani, A.,
- Liu, Y.,
- Liventsev, D.,
- Mandl, F.,
- Matyja, A.,
- McOnie, S.,
- Medvedeva, T.,
- Mitaroff, W.,
- Miyabayashi, K.,
- Miyake, H.,
- Miyata, H.,
- Miyazaki, Y.,
- Mizuk, R.,
- Moloney, G. R.,
- Nakano, E.,
- Nakao, M.,
- Nishida, S.,
- Nitoh, O.,
- Nozaki, T.,
- Ogawa, S.,
- Ohshima, T.,
- Okuno, S.,
- Ozaki, H.,
- Pakhlov, P.,
- Pakhlova, G.,
- Park, C.W.,
- Park, H.,
- Peak, L. S.,
- Pestotnik, R.,
- Piilonen, L. E.,
- Sahoo, H.,
- Sakai, Y.
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Abstract |
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A distinct peak is observed in the π^±Ψ'invariant mass distribution near 4.43 GeV in B→ Kπ^±Ψ' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M = 4433± 4(stat)± 2(syst) MeV and Γ= 45\begin+18\\-13\end(stat)\begin+30\\-13\end(syst)MeV.The product branching fraction is determined to be B(B^0→ K^∓Z^±(4430)→ π^±Ψ')= (4.1±1.0(stat)±1.4(syst))×10^{-5}, where Z^±(4430)is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605 fb^{-1} data sample that contains 657 ×10^6 B\bar{B} pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e^+e^- collider..
PHYSICAL REVIEW LETTERS. v.100, n.14, 2008, p.142001-1-142001-6 |
Publication details |
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