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. ChiangI. 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

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Abstract

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).

Original languageEnglish
Article number021101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number2
DOIs
Publication statusPublished - 2011 Jul 5

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Bahinipati, S., Trabelsi, K., Kinoshita, K., Arinstein, K., Aulchenko, V., Aushev, T., Bakich, A. M., Balagura, V., Barberio, E., Belous, K., Bhardwaj, V., Bhuyan, B., Bischofberger, M., Bondar, A., Bozek, A., Bračko, M., Chen, A., Chen, P., Cheon, B. G., ... Zupanc, A. (2011). Measurements of time-dependent CP asymmetries in B→D* π± decays using a partial reconstruction technique. Physical Review D - Particles, Fields, Gravitation and Cosmology, 84(2), [021101]. https://doi.org/10.1103/PhysRevD.84.021101