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Search for CP violation in τ±→KS0π ±ντ decays at Belle

  • M. Bischofberger
  • , H. Hayashii
  • , K. Adamczyk
  • , H. Aihara
  • , V. Aulchenko
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , K. Belous
  • , A. Bozek
  • , M. Bračko
  • , T. E. Browder
  • , P. Chen
  • , B. G. Cheon
  • , C. C. Chiang
  • , I. S. Cho
  • , K. Cho
  • , Y. Choi
  • , M. Danilov
  • , Z. Doležal
  • A. Drutskoy, S. Eidelman, D. Epifanov, B. Golob, H. Ha, J. Haba, K. Hayasaka, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, T. Kawasaki, C. Kiesling, H. O. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, P. Križan, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, Y. Li, C. Liu, R. Louvot, J. MacNaughton, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, G. Pakhlova, H. Park, H. K. Park, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, J. G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. S. Sohn, S. Stanič, M. Starič, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, S. Uno, G. Varner, A. Vinokurova, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Won, H. Yamamoto, Y. Yamashita, C. Z. Yuan, P. Zhou, V. Zhulanov, T. Zivko
  • Nara Women's University
  • Institute for Nuclear Physics
  • University of Tokyo
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Novosibirsk State University
  • University of Sydney
  • Institute for Theoretical and Experimental Physics
  • University of Melbourne
  • Kurchatov Institute
  • Department of Biochemistry and Molecular and Structural Biology
  • University of Maribor
  • University of Hawaii
  • National Taiwan University
  • Hanyang University
  • Yonsei University
  • Korea Institute of Science and Technology Information
  • Sungkyunkwan University
  • 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
  • Saga University
  • Chiba University
  • Niigata University
  • Max-Planck-Institut für Physik
  • The Graduate University for Advanced Studies
  • Justus-Liebig-Universität Giessen
  • Seoul National University
  • Virginia Polytechnic Institute and State University
  • University of Science and Technology of China
  • ENAC-IIC-GEL
  • Tata Institute of Fundamental Research, Mumbai
  • Technische Universität München
  • Hiroshima Institute of Technology
  • Osaka City University
  • National Central University
  • Tokyo University of Agriculture and Technology
  • Kanagawa University
  • Institute of Meteorology and Climate Research
  • Institut für Hochenergiephysik
  • University of Nova Gorica
  • Tokyo Metropolitan University
  • University of Illinois at Urbana-Champaign
  • National United University Taiwan
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Nippon Dental University
  • Wayne State University

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

42 Citations (Scopus)

Résumé

We report on a search for CP violation in τ±→ KS0π±ντ decays using a data sample of 699fb-1 collected by the Belle experiment at the KEKB electron-positron asymmetric-energy collider. The CP asymmetry is measured in four bins of the invariant mass of the KS0π± system and found to be compatible with zero with a precision of O(10-3) in each mass bin. Limits for the CP violation parameter Im(ηS) are given at the 90% confidence level. These limits are |Im(ηS)|<0.026 or better, depending on the parametrization used to describe the hadronic form factors, and improve upon previous limits by 1 order of magnitude.

langue originaleAnglais
Numéro d'article131801
journalPhysical Review Letters
Volume107
Numéro de publication13
Les DOIs
étatPublié - 23 sept. 2011
Modification externeOui

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