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Evidence of time-dependent CP violation in the decay B0→D*+D *-

  • K. Vervink
  • , T. Aushev
  • , O. Schneider
  • , K. Arinstein
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , V. Bhardwaj
  • , U. Bitenc
  • , A. Bondar
  • , A. Bozek
  • , M. Bračko
  • , J. Brodzicka
  • , T. E. Browder
  • , Y. Chao
  • , A. Chen
  • , B. G. Cheon
  • , C. C. Chiang
  • , R. Chistov
  • I. S. Cho, Y. Choi, J. Dalseno, M. Danilov, W. Dungel, S. Eidelman, S. Fratina, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lee, M. J. Lee, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, J. Schümann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, S. Stanič, J. Stypula, T. Sumiyoshi, N. Tamura, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, P. Wang, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, N. Zwahlen
  • ENAC-IIC-GEL
  • Institute for Theoretical and Experimental Physics
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • University of Sydney
  • University of Melbourne
  • Panjab University
  • Department of Biochemistry and Molecular and Structural Biology
  • Institute for Nuclear Physics
  • University of Maribor
  • High Energy Accelerator Research Organization (KEK)
  • University of Hawaii
  • National Taiwan University
  • National Central University
  • Hanyang University
  • Yonsei University
  • Sungkyunkwan University
  • Institut für Hochenergiephysik
  • University of Cincinnati
  • University of Ljubljana
  • Korea University
  • Osaka University
  • Nagoya University
  • Nara Women's University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Saga University
  • Tokyo Institute of Technology
  • Okayama University
  • Chiba University
  • Niigata University
  • The Graduate University for Advanced Studies
  • Seoul National University
  • University of Science and Technology of China
  • Tokyo University of Agriculture and Technology
  • Kanagawa University
  • Virginia Polytechnic Institute and State University
  • Kurchatov Institute
  • 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

Research output: Contribution to journalArticlepeer-review

Abstract

We report a measurement of the CP-odd fraction and the time-dependent CP violation in B0→D*+D*- decays, using 657×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a CP-odd fraction of R=0.125±0.043(stat)±0.023(syst). From the distributions of the proper-time intervals between a B0→D*+D*- decay and the other B meson in the event, we obtain evidence of CP violation with measured parameters AD*+D*-=0.15±0.13(stat)±0.04(syst) and SD*+D*-=-0.96±0.25(stat)-0.16+0.13(syst).

Original languageEnglish
Article number111104
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume80
Issue number11
DOIs
Publication statusPublished - 14 Dec 2009
Externally publishedYes

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