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Measurement of ηη production in two-photon collisions

  • S. Uehara
  • , Y. Watanabe
  • , H. Nakazawa
  • , I. Adachi
  • , H. Aihara
  • , K. Arinstein
  • , T. Aushev
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , K. Belous
  • , M. Bischofberger
  • , A. Bondar
  • , G. Bonvicini
  • , A. Bozek
  • , M. Bračko
  • , T. E. Browder
  • , P. Chang
  • , Y. Chao
  • A. Chen, P. Chen, B. G. Cheon, I. S. Cho, Y. Choi, J. Dalseno, Z. Doležal, A. Drutskoy, S. Eidelman, P. Goldenzweig, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, B. R. Ko, P. Kody, S. Korpar, P. Križan, P. Krokovny, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, F. Simon, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, T. Sumiyoshi, Y. Teramoto, T. Uglov, Y. Unno, S. Uno, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, R. Wedd, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, P. Zhou, T. Zivko, A. Zupanc
  • High Energy Accelerator Research Organization, Tsukuba
  • Kanagawa University
  • National Central University
  • The University of Tokyo
  • RAS - Budker Institute of Nuclear Physics
  • Novosibirsk State University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Swiss Federal Institute of Technology Lausanne
  • The University of Sydney
  • University of Melbourne
  • Institute of High Energy Physics
  • Nara Women's University
  • Wayne State University
  • H. Niewodniczanski Institute of Nuclear Physics
  • Jožef Stefan Institute
  • University of Maribor
  • University of Hawai'i at Mānoa
  • National Taiwan University
  • Hanyang University
  • Yonsei University
  • Sungkyunkwan University
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Technische Universität München
  • Charles University
  • University of Cincinnati
  • Korea University
  • Nagoya University
  • Tohoku University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Chiba University
  • Niigata University
  • Korea Institute of Science and Technology Information
  • University of Ljubljana
  • Justus Liebig University Giessen
  • Seoul National University
  • Tata Institute of Fundamental Research
  • Osaka Metropolitan University
  • Tokyo University of Agriculture and Technology
  • Toho University
  • Virginia Polytechnic Institute and State University
  • Austrian Academy of Sciences
  • University of Nova Gorica
  • Tokyo Metropolitan University
  • National United University
  • CAS - Institute of High Energy Physics
  • Nippon Dental University
  • University of Science and Technology of China
  • Karlsruhe Institute of Technology

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We report the first measurement of the differential cross section for the process γγ→ηη in the kinematic range above the ηη threshold, 1.096GeV<W<3.8GeV over nearly the entire solid angle range, |cosθ⊃*|≤0.9 or ≤1.0 depending on W, where W and θ⊃* are the energy and η scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 393fb⊃-1 data sample collected with the Belle detector at the KEKB e⊃+e⊃- collider. In the W range 1.1-2.0GeV/c2 we perform an analysis of resonance amplitudes for various partial waves, and at higher energy we compare the energy and the angular dependences of the cross section with predictions of theoretical models and extract contributions of the χcJ charmonia.

Original languageEnglish
Article number114031
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number11
DOIs
StatePublished - 30 Dec 2010

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