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Evidence for a new resonance and search for the Y(4140) in the γγ→φJ/ψ process

  • C. P. Shen
  • , C. Z. Yuan
  • , H. Aihara
  • , K. Arinstein
  • , T. Aushev
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , K. Belous
  • , V. Bhardwaj
  • , M. Bischofberger
  • , M. Bračko
  • , T. E. Browder
  • , M. C. Chang
  • , P. Chang
  • , A. Chen
  • , P. Chen
  • , B. G. Cheon
  • , C. C. Chiang
  • I. S. Cho, Y. Choi, J. Dalseno, A. Das, Z. Doležal, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, B. Y. Han, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar, M. Kreps, P. Križan, P. Krokovny, T. Kuhr, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, J. G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, A. Sokolov, E. Solovieva, M. Starič, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, T. Zivko, O. Zyukova
  • University of Hawaii
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • University of Tokyo
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Novosibirsk State University
  • Institute for Theoretical and Experimental Physics
  • ENAC-IIC-GEL
  • University of Sydney
  • University of Melbourne
  • Kurchatov Institute
  • Panjab University
  • Nara Women's University
  • Department of Biochemistry and Molecular and Structural Biology
  • University of Maribor
  • Fu Jen Catholic University
  • National Taiwan University
  • National Central University
  • Hanyang University
  • Yonsei University
  • Sungkyunkwan University
  • Max-Planck-Institut für Physik
  • Technische Universität München
  • Tata Institute of Fundamental Research, Mumbai
  • Charles University
  • University of Cincinnati
  • University of Ljubljana
  • Korea University
  • High Energy Accelerator Research Organization (KEK)
  • Nagoya University
  • Tohoku University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Niigata University
  • Seoul National University
  • The Graduate University for Advanced Studies
  • Institute of Meteorology and Climate Research
  • Justus-Liebig-Universität Giessen
  • University of Science and Technology of China
  • Institute for Nuclear Physics
  • INFN Sezione di Torino
  • Osaka City University
  • Tokyo University of Agriculture and Technology
  • Kanagawa University
  • Virginia Polytechnic Institute and State University
  • National United University Taiwan
  • Nippon Dental University

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

The process γγ→φ/ψ is measured using a data sample of 825fb-1 collected with the Belle detector. A narrow peak of 8.8-3.2+4.2 events, with a significance of 3.2 standard deviations including systematic uncertainty, is observed. The mass and natural width of the structure [named X(4350)] are measured to be [4350.6-5.1+4.6(stat)±0.7(syst)]MeV/ c2 and [13-9+18(stat)±4(syst)]MeV, respectively. The product of its two-photon decay width and branching fraction to φJ/ψ is [6.7-2.4+3.2(stat)±1.1(syst)]eV for JP=0+, or [1.5-0.6+0.7(stat)±0.3(syst)]eV for JP=2+. No signal for the Y(4140)→φJ/ψ structure reported by the CDF Collaboration in B→K+φJ/ψ decays is observed, and limits of Γγγ(Y(4140))B(Y(4140)→φJ/ψ)<41eV for JP=0 + or <6.0eV for JP=2+ are determined at the 90% C.L. This disfavors the scenario in which the Y(4140) is a Ds*+Ds*- molecule.

langue originaleAnglais
Numéro d'article112004
journalPhysical Review Letters
Volume104
Numéro de publication11
Les DOIs
étatPublié - 16 mars 2010
Modification externeOui

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