Observation of a resonancelike structure in the pi +- psi' mass distribution in exclusive B-->Kpi +- psi' 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 Chen; W 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; Belle Collaboration

doi:10.1103/PhysRevLett.100.142001

Observation of a resonancelike structure in the pi +- psi' mass distribution in exclusive B-->Kpi +- psi' decays

Phys Rev Lett. 2008 Apr 11;100(14):142001. doi: 10.1103/PhysRevLett.100.142001. Epub 2008 Apr 8.

Authors

S-K Choi¹, 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 Chen, W 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; Belle Collaboration

Affiliation

¹ Gyeongsang National University, Chinju.

PMID: 18518023
DOI: 10.1103/PhysRevLett.100.142001

Abstract

A distinct peak is observed in the pi +/- psi' invariant mass distribution near 4.43 GeV in B-->K pi +/- psi' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433+/-4(stat)+/-2(syst) MeV and Gamma=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B 0-->K -/+Z+/-(4430)) x B(Z+/-(4430)-->pi+/-psi')=(4.1+/-1.0(stat)+/-1.4(syst)) x 10(-5), where Z+/-(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5 sigma. These results are obtained from a 605 fb(-1) data sample that contains 657 x 10(6) BB pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider.

Publication types

Research Support, Non-U.S. Gov't