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Measurement of B0→J/ψη(′) and constraint on the η-η′ Mixing angle

  • M. C. Chang
  • , Y. C. Duh
  • , J. Y. Lin
  • , I. Adachi
  • , K. Adamczyk
  • , H. Aihara
  • , D. M. Asner
  • , T. Aushev
  • , A. M. Bakich
  • , V. Bhardwaj
  • , B. Bhuyan
  • , A. Bondar
  • , A. Bozek
  • , M. Bračko
  • , J. Brodzicka
  • , T. E. Browder
  • , P. Chang
  • , A. Chen
  • , K. F. Chen
  • , P. Chen
  • B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, A. Garmash, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, N. Katayama, T. Kawasaki, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Koblitz, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, K. S. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. A. Shibata, J. G. Shiu, A. Sibidanov, F. Simon, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, M. Sumihama, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, V. Vorobyev, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc
  • Fu Jen Catholic University
  • High Energy Accelerator Research Organization, Tsukuba
  • H. Niewodniczanski Institute of Nuclear Physics
  • The University of Tokyo
  • Pacific Northwest National Laboratory
  • Alikhanov Institute for Theoretical and Experimental Physics
  • The University of Sydney
  • Nara Women's University
  • Indian Institute of Technology Guwahati
  • Novosibirsk State University
  • Jožef Stefan Institute
  • University of Maribor
  • University of Hawai'i at Mānoa
  • National Taiwan University
  • National Central University
  • Hanyang University
  • Yonsei University
  • Gyeongsang National University
  • Sungkyunkwan University
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Technische Universität München
  • Charles University
  • Tata Institute of Fundamental Research
  • University of Ljubljana
  • Nagoya University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Tohoku University
  • University of Melbourne
  • Niigata University
  • Korea University
  • Korea Institute of Science and Technology Information
  • University of Cincinnati
  • Karlsruhe Institute of Technology
  • Panjab University
  • Tokyo Metropolitan University
  • Justus Liebig University Giessen
  • Seoul National University
  • Virginia Polytechnic Institute and State University
  • Indian Institute of Technology Madras
  • University of Science and Technology of China
  • CAS - Institute of High Energy Physics
  • Swiss Federal Institute of Technology Lausanne
  • The University of Osaka
  • Hiroshima Institute of Technology
  • Osaka Metropolitan University
  • Tokyo University of Agriculture and Technology
  • Toho University
  • Kanagawa University
  • Luther College, Decorah
  • Austrian Academy of Sciences
  • Yamagata University
  • Institute for High Energy Physics
  • Institute of Science Tokyo
  • University of Nova Gorica
  • Gifu University
  • University of Bonn
  • National United University Taiwan
  • Nippon Dental University

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We measure the branching fractions of B0→J/ψη( ′) decays with the complete Belle data sample of 772×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. The results for the branching fractions are: B(B0→J/ψη)=(12.3±1.71. 8±0.7)×10 -6 and B(B0→J/ψη′)<7. 4×10 -6 at 90% confidence level. The η-η′ mixing angle is constrained to be less than 42.2° at 90% confidence level.

Original languageEnglish
Article number091102
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number9
DOIs
StatePublished - 4 May 2012

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