Phys. Rev. D
80,
031104(R)
(2009)
[7 pages]
Dalitz analysis of B→Kπ+ψ′ decays and the Z(4430)+
R. Mizuk et al. Belle Collaboration
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R. Mizuk14, I. Adachi10, H. Aihara44, K. Arinstein1,32, T. Aushev19,14, A. M. Bakich41, V. Balagura14, E. Barberio22, A. Bay19, K. Belous13, V. Bhardwaj34, A. Bozek28, M. Bračko21,15, T. E. Browder9, M.-C. Chang5, A. Chen25, B. G. Cheon8, C.-C. Chiang27, R. Chistov14, I.-S. Cho49, S.-K. Choi7, Y. Choi40, J. Dalseno10, M. Danilov14, S. Eidelman1,32, N. Gabyshev1,32, P. Goldenzweig3, B. Golob20,15, H. Ha17, J. Haba10, B.-Y. Han17, T. Hara10, Y. Hasegawa39, K. Hayasaka23, Y. Hoshi43, W.-S. Hou27, H. J. Hyun18, T. Iijima23, K. Inami23, A. Ishikawa36, H. Ishino45,*, R. Itoh10, M. Iwasaki44, Y. Iwasaki10, N. J. Joshi42, D. H. Kah18, J. H. Kang49, P. Kapusta28, H. Kawai2, T. Kawasaki30, H. J. Kim18, H. O. Kim18, J. H. Kim40, Y. I. Kim18, Y. J. Kim6, K. Kinoshita3, B. R. Ko17, S. Korpar21,15, P. Križan20,15, P. Krokovny10, A. Kuzmin1,32, Y.-J. Kwon49, S.-H. Kyeong49, J. S. Lange50, M. J. Lee38, S. E. Lee38, T. Lesiak28,4, C. Liu37, Y. Liu23, D. Liventsev14, R. Louvot19, D. Marlow35, A. Matyja28, S. McOnie41, K. Miyabayashi24, H. Miyata30, Y. Miyazaki23, T. Mori23, E. Nakano33, M. Nakao10, H. Nakazawa25, Z. Natkaniec28, S. Nishida10, O. Nitoh47, T. Ohshima23, S. Okuno16, S. L. Olsen9, P. Pakhlov14, G. Pakhlova14, C. W. Park40, H. Park18, H. K. Park18, R. Pestotnik15, L. E. Piilonen48, H. Sahoo9, K. Sakai30, Y. Sakai10, O. Schneider19, C. Schwanda12, A. Sekiya24, K. Senyo23, M. Shapkin13, V. Shebalin1,32, J.-G. Shiu27, B. Shwartz1,32, S. Stanič31, M. Starič15, T. Sumiyoshi46, Y. Teramoto33, I. Tikhomirov14, K. Trabelsi10, S. Uehara10, T. Uglov14, Y. Unno8, P. Urquijo22, G. Varner9, K. E. Varvell41, K. Vervink19, C. H. Wang26, M.-Z. Wang27, P. Wang11, X. L. Wang11, Y. Watanabe16, R. Wedd22, E. Won17, B. D. Yabsley41, Y. Yamashita29, C. Z. Yuan11, C. C. Zhang11, Z. P. Zhang37, V. Zhulanov1,32, T. Zivko15, A. Zupanc15, and O. Zyukova1,32 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chiba University, Chiba
3University of Cincinnati, Cincinnati, Ohio 45221
4T. Kościuszko Cracow University of Technology, Krakow
5Department of Physics, Fu Jen Catholic University, Taipei
6The Graduate University for Advanced Studies, Hayama
7Gyeongsang National University, Chinju
8Hanyang University, Seoul
9University of Hawaii, Honolulu, Hawaii 96822
10High Energy Accelerator Research Organization (KEK), Tsukuba
11Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
12Institute of High Energy Physics, Vienna
13Institute of High Energy Physics, Protvino
14Institute for Theoretical and Experimental Physics, Moscow
15J. Stefan Institute, Ljubljana
16Kanagawa University, Yokohama
17Korea University, Seoul
18Kyungpook National University, Taegu
19École Polytechnique Fédérale de Lausanne (EPFL), Lausanne
20Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana
21University of Maribor, Maribor
22University of Melbourne, School of Physics, Victoria 3010
23Nagoya University, Nagoya
24Nara Women’s University, Nara
25National Central University, Chung-li
26National United University, Miao Li
27Department of Physics, National Taiwan University, Taipei
28H. Niewodniczanski Institute of Nuclear Physics, Krakow
29Nippon Dental University, Niigata
30Niigata University, Niigata
31University of Nova Gorica, Nova Gorica
32Novosibirsk State University, Novosibirsk
33Osaka City University, Osaka
34Panjab University, Chandigarh
35Princeton University, Princeton, New Jersey 08544
36Saga University, Saga
37University of Science and Technology of China, Hefei
38Seoul National University, Seoul
39Shinshu University, Nagano
40Sungkyunkwan University, Suwon
41University of Sydney, Sydney, New South Wales
42Tata Institute of Fundamental Research, Mumbai
43Tohoku Gakuin University, Tagajo
44Department of Physics, University of Tokyo, Tokyo
45Tokyo Institute of Technology, Tokyo
46Tokyo Metropolitan University, Tokyo
47Tokyo University of Agriculture and Technology, Tokyo
48IPNAS, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
49Yonsei University, Seoul
50Justus-Liebig-Universität Gießen, Gießen
Received 18 May 2009; published 7 August 2009
From a Dalitz plot analysis of B→Kπ+ψ′ decays, we find a signal for Z(4430)+→π+ψ′ with a mass M=(4443-12-13+15+19) MeV/c2, width Γ=(107-43-56+86+74) MeV, product branching fraction B(B̅ 0→K-Z(4430)+)×B(Z(4430)+→π+ψ′)=(3.2-0.9-1.6+1.8+5.3)×10-5, and significance of 6.4σ that agrees with previous Belle measurements based on the same data sample. In addition, we determine the branching fraction B(B0→K*(892)0ψ′)=(5.52-0.32-0.58+0.35+0.53)×10-4 and the fraction of K*(892)0 mesons that are longitudinally polarized fL=(44.8-2.7-5.3+4.0+4.0)%. These results are obtained from a 605 fb-1 data sample that contains 657×106 BB̅ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.80.031104
DOI:
10.1103/PhysRevD.80.031104
PACS:
14.40.Gx, 12.39.Mk, 13.25.Hw
*Present address: Okayama University, Okayama.
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