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Measurement of the e+e-→J/ψcc̄ cross section at s 10.6GeV

  • P. Pakhlov
  • , H. Aihara
  • , K. Arinstein
  • , T. Aushev
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , K. Belous
  • , V. Bhardwaj
  • , A. Bondar
  • , M. Bračko
  • , J. Brodzicka
  • , T. E. Browder
  • , M. C. Chang
  • , P. Chang
  • , A. Chen
  • , B. G. Cheon
  • , R. Chistov
  • , S. K. Choi
  • Y. Choi, M. Danilov, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, B. Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, H. Kawai, T. Kawasai, H. Kichimi, H. O. Kim, Y. I. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krian, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, S. W. Lin, Y. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, M. Nakao, H. Nakazawa, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanič, M. Starič, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova
  • Institute for Theoretical and Experimental Physics
  • 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
  • Department of Biochemistry and Molecular and Structural Biology
  • University of Maribor
  • High Energy Accelerator Research Organization (KEK)
  • University of Hawaii
  • Fu Jen Catholic University
  • National Taiwan University
  • National Central University
  • Hanyang University
  • Gyeongsang National University
  • Sungkyunkwan University
  • Virginia Polytechnic Institute and State University
  • University of Cincinnati
  • Institut für Hochenergiephysik
  • University of Ljubljana
  • Korea University
  • Nagoya University
  • Nara Women's University
  • Tohoku University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Saga University
  • Tokyo Institute of Technology
  • Tata Institute of Fundamental Research, Mumbai
  • Chiba University
  • Niigata University
  • Yonsei University
  • Justus-Liebig-Universität Giessen
  • Seoul National University
  • Tadeusz Kosciuszko Cracow University of Technology
  • Institute for Nuclear Physics
  • Hiroshima Institute of Technology
  • Tokyo University of Agriculture and Technology
  • Toho University
  • Kanagawa University
  • University of Nova Gorica
  • Tokyo Metropolitan University
  • Osaka City University
  • National United University Taiwan
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Nippon Dental University
  • University of Science and Technology of China

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

We present a new measurement of the e+e-→J/ψcc̄ cross section where the cc̄ pair can fragment either into charmed hadrons or a charmonium state. In the former case the J/ψ and a charmed hadron are reconstructed, while the latter process is measured using the recoil mass technique, which allows the identification of two-body final states without reconstruction of one of the charmonia. The measured e+e-→J/ψcc̄ cross section is (0.74±0.08+0.09-0.08)pb, and the e+e-→J/ψXnon- cc̄ cross section is (0.43±0.09±0.09)pb. We note that the measured cross sections are obtained from a data sample with the multiplicity of charged tracks in the event larger than 4; corrections for the effect of this requirement are not performed as this cannot be done in a model-independent way. The analysis is based on a data sample with an integrated luminosity of 673fb-1 recorded near the Υ(4S) resonance with the Belle detector at the KEKB e+e- asymmetric-energy collider.

langue originaleAnglais
Numéro d'article071101
journalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume79
Numéro de publication7
Les DOIs
étatPublié - 1 avr. 2009
Modification externeOui

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