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Observation of a resonance-like structure in the π ±ψ' mass distribution in exclusive B → Kπ±ψ' decays
- Authors
- Choi, S.-K.; Olsen, S.L.; Adachi, I.; Aihara, H.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A.M.; Balagura, V.; Bedny, I.; Bitenc, U.; Bondar, A.; Bozek, A.; Bracko, M.; Brodzicka, J.; Browder, T.E.; Chang, P.; Chao, Y.; Chen, A.; Chen, K.-F.; Chen, W.T.; Cheon, Byung Gu; 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.; Hou, W.-S.; 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.; Krizan, P.; Krokovny, P.; Kumar, R.; Kuo, C.C.; Kuzmin, A.; Kwon, Y.-J.; Lange, J.S.; Lee, J.S.; Lee, M.J.; Lee, S.E.; Lesiak, T.; Limosani, A.; Lin, S.-W.; 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.; Schneider, O.; Schwartz, A.J.; Senyo, K.; Shapkin, M.; Shen, C.P.; Shibuya, H.; Shwartz, B.; Singh, J.B.; Somov, A.; Stanic, S.; Staric, M.; Sumiyoshi, T.; Suzuki, S.Y.; Takasaki, F.; Tamai, K.; Tanaka, M.; Teramoto, Y.; Tikhomirov, I.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Varner, G.; Vervink, K.; Villa, S.; Wang, C.H.; Wang, M.-Z.; Wang, P.; Wang, X.L.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B.D.; Yamashita, Y.; Yuan, C.Z.; Zhang, Z.P.; Zhulanov, V.; Zupanc, A.; Zyukova, O.
- Issue Date
- Aug-2007
- Publisher
- LP
- Citation
- 23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007, pp.1 - 6
- Indexed
- SCOPUS
- Journal Title
- 23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007
- Start Page
- 1
- End Page
- 6
- ISSN
- 0000-0000
- Abstract
- 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 F = 45+18 -13 (stat)+30-13 (syst) MeV. The product branching fraction is determined to be B(B0 → K±Z± (4430)) × B(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 million B ̄B pairs collected near the γ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.
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Related Researcher
- Cheon, Byung Gu
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)