Observation of a resonance-like structure in the π ±ψ' mass distribution in exclusive B → Kπ±ψ' decays

S. K. Choi, S. L. Olsen, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. F. ChenW. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, S. Villa, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

Research output: Contribution to conferencePaper

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.

Original languageEnglish
Publication statusPublished - 2007 Dec 1
Event23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007 - Daegu, Korea, Republic of
Duration: 2007 Aug 132007 Aug 18

Other

Other23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007
CountryKorea, Republic of
CityDaegu
Period07/8/1307/8/18

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Observation of a resonance-like structure in the π <sup>±</sup>ψ' mass distribution in exclusive B → Kπ<sup>±</sup>ψ' decays'. Together they form a unique fingerprint.

  • Cite this

    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., ... Zyukova, O. (2007). Observation of a resonance-like structure in the π ±ψ' mass distribution in exclusive B → Kπ±ψ' decays. Paper presented at 23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007, Daegu, Korea, Republic of.