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Dalitz analysis of B→Kπ+ψ′ decays and the Z(4430)

  • R. Mizuk
  • , I. Adachi
  • , H. Aihara
  • , K. Arinstein
  • , T. Aushev
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , K. Belous
  • , V. Bhardwaj
  • , A. Bozek
  • , M. Bračko
  • , T. E. Browder
  • , M. C. Chang
  • , A. Chen
  • , B. G. Cheon
  • , C. C. Chiang
  • , R. Chistov
  • , I. S. Cho
  • S. K. Choi, Y. Choi, J. Dalseno, M. Danilov, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B. Y. Han, T. Hara, Y. Hasegawa, K. Hayasaka, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, C. Liu, Y. Liu, D. Liventsev, R. Louvot, D. Marlow, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. Sekiya, K. Senyo, M. Shapkin, V. Shebalin, J. G. Shiu, B. Shwartz, S. Stanič, M. Starič, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, 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, C. C. Zhang, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova
  • Institute for Theoretical and Experimental Physics
  • High Energy Accelerator Research Organization (KEK)
  • University of Tokyo
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Novosibirsk State University
  • ENAC-IIC-GEL
  • University of Sydney
  • University of Melbourne
  • Kurchatov Institute
  • Panjab University
  • Institute for Nuclear Physics
  • Department of Biochemistry and Molecular and Structural Biology
  • University of Maribor
  • University of Hawaii
  • Fu Jen Catholic University
  • National Central University
  • Hanyang University
  • National Taiwan University
  • Yonsei University
  • Gyeongsang National University
  • Sungkyunkwan University
  • University of Cincinnati
  • Tokyo Institute of Technology
  • University of Ljubljana
  • Korea University
  • Shinshu University
  • Nagoya University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Saga University
  • Okayama University
  • Tata Institute of Fundamental Research, Mumbai
  • Chiba University
  • Niigata University
  • The Graduate University for Advanced Studies
  • Justus-Liebig-Universität Giessen
  • Seoul National University
  • Tadeusz Kosciuszko Cracow University of Technology
  • University of Science and Technology of China
  • Princeton University
  • Nara Women's University
  • Osaka City University
  • Tokyo University of Agriculture and Technology
  • Kanagawa University
  • Virginia Polytechnic Institute and State University
  • Institut für Hochenergiephysik
  • University of Nova Gorica
  • Tokyo Metropolitan University
  • National United University Taiwan
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Nippon Dental University

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

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(B̄0→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 605fb-1 data sample that contains 657×106 BB̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.

langue originaleAnglais
Numéro d'article031104
journalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume80
Numéro de publication3
Les DOIs
étatPublié - 7 août 2009
Modification externeOui

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