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Measurements of time-dependent CP asymmetries in B→D* π± decays using a partial reconstruction technique

  • S. Bahinipati
  • , K. Trabelsi
  • , K. Kinoshita
  • , K. Arinstein
  • , V. Aulchenko
  • , T. Aushev
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , K. Belous
  • , V. Bhardwaj
  • , B. Bhuyan
  • , M. Bischofberger
  • , A. Bondar
  • , A. Bozek
  • , M. Bračko
  • , A. Chen
  • , P. Chen
  • , B. G. Cheon
  • , C. C. Chiang
  • I. S. Cho, K. Cho, Y. Choid, J. Dalseno, Z. Dalsžal, Z. Drásal, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, A. Ishikawa, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, C. Kiesling, H. J. Kim, M. J. Kim, B. R. Ko, N. Kobayashi, P. Kodyš, P. Križan, T. Kumita, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, C. Liu, R. Louvot, A. Matyja, S. Mconie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, P. Pakhlov, C. W. Park, M. Petrič, L. E. Piilonen, A. Poluektov, M. Röhrken, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Tanaka, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, A. Vinokurova, C. H. Wang, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, P. Zhou, T. Zivko, A. Zupanc
  • University of Cincinnati
  • High Energy Accelerator Research Organization (KEK)
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Novosibirsk State University
  • Institute for Theoretical and Experimental Physics
  • ENAC-IIC-GEL
  • University of Sydney
  • University of Melbourne
  • Kurchatov Institute
  • Panjab University
  • Department of Biosciences and Bioengineering
  • Nara Women's University
  • Institute for Nuclear Physics
  • Department of Biochemistry and Molecular and Structural Biology
  • University of Maribor
  • National Central University
  • National Taiwan University
  • Hanyang University
  • Yonsei University
  • Korea Institute of Science and Technology Information
  • Sungkyunkwan University
  • Max-Planck-Institut für Physik
  • Technische Universität München
  • Charles University
  • University of Ljubljana
  • Korea University
  • Tohoku University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Saga University
  • Tokyo Institute of Technology
  • Research Center for Nuclear Physics
  • Tokyo Metropolitan University
  • Justus-Liebig-Universität Giessen
  • Seoul National University
  • University of Hawaii
  • University of Science and Technology of China
  • Niigata University
  • Nagoya University
  • Tata Institute of Fundamental Research, Mumbai
  • Institute of Meteorology and Climate Research
  • Tokyo University of Agriculture and Technology
  • Toho University
  • Virginia Polytechnic Institute and State University
  • Institut für Hochenergiephysik
  • University of Nova Gorica
  • Osaka City University
  • National United University
  • Nippon Dental University
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Wayne State University

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

We report results on time-dependent CP asymmetries in B→D *π± decays based on a data sample containing 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the Υ(4S) resonance. We use a partial reconstruction technique, wherein signal B→D* π± events are identified using information only from the fast pion from the B decay and the slow pion from the subsequent decay of the D*, where the former (latter) corresponds to D*+(D*-) final states. We obtain CP violation parameters S+=+0.061±0. 018(stat)±0.012(syst) and S-=+0.031±0.019(stat) ±0.015(syst).

langue originaleAnglais
Numéro d'article021101
journalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Numéro de publication2
Les DOIs
étatPublié - 5 juil. 2011
Modification externeOui

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