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High statistics measurement of the cross sections of γγ → π +π - production

  • T. Mori
  • , S. Uehara
  • , Y. Watanabe
  • , K. Abe
  • , I. Adachi
  • , H. Aihara
  • , K. Arinstein
  • , V. Aulchenko
  • , T. Aushev
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , K. Belous
  • , U. Bitenc
  • , I. Bizjak
  • , S. Blyth
  • , A. Bondar
  • , M. Bračko
  • , T. E. Browder
  • M. C. Chang, A. Chen, W. T. Chen, B. G. Cheon, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, S. Mconie, T. Medvedeva, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, S. Okuno, S. L. Olsen, S. Ono, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc
  • Nagoya University
  • High Energy Accelerator Research Organization (KEK)
  • Kanagawa University
  • Tohoku Gakuin University
  • University of Tokyo
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Institute for Theoretical and Experimental Physics
  • ENAC-IIC-GEL
  • University of Sydney
  • University of Melbourne
  • Kurchatov Institute
  • Department of Biochemistry and Molecular and Structural Biology
  • National Central University
  • University of Maribor
  • University of Hawaii
  • Fu Jen Catholic University
  • Hanyang University
  • Yonsei University
  • Gyeongsang National University
  • Sungkyunkwan University
  • Virginia Polytechnic Institute and State University
  • University of Cincinnati
  • University of Ljubljana
  • Korea University
  • Nara Women's University
  • Osaka University
  • National Taiwan University
  • Institute for Nuclear Physics
  • Niigata University
  • Seoul National University
  • The Graduate University for Advanced Studies
  • Panjab University
  • Institut für Hochenergiephysik
  • Tokyo Metropolitan University
  • Hiroshima Institute of Technology
  • Osaka City University
  • Tokyo University of Agriculture and Technology
  • Tokyo Institute of Technology
  • Riken BNL Research Center
  • Kyungpook National University
  • Shinshu University
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Toho University
  • University of Nova Gorica
  • Tsinghua University
  • National United University Taiwan
  • Tohoku University
  • Nippon Dental University
  • University of Science and Technology of China

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

We report on a high statistics measurement of the total and differential cross sections of the process γγ → π +π - in the π +π - invariant mass range 0.8 GeV/c 2 < W < 1.5 GeV/c 2 with 85.9 fb -1 of data collected at √s = 10.58 GeV and 10.52 GeV with the Belle detector. A clear signal of the f 0(980) resonance is observed in addition to the f 2(1270) resonance. An improved 90% confidence level upper limit ℬ(η′(958) → π +π - < 2.9 × 10 -3 is obtained for P- and CP-violating decay of the η′(958) meson using the most conservative assumption about the interference with the background.

langue originaleAnglais
Numéro d'article074102
journalJournal of the Physical Society of Japan
Volume76
Numéro de publication7
Les DOIs
étatPublié - 1 juil. 2007
Modification externeOui

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