Measurements of time-dependent CP violation in B0→ψ(2S)KS0 decays

  • H. Sahoo
  • , T. E. Browder
  • , K. Trabelsi
  • , I. Adachi
  • , H. Aihara
  • , K. Arinstein
  • , T. Aushev
  • , S. Bahinipati
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , I. Bedny
  • , K. Belous
  • , U. Bitenc
  • , A. Bondar
  • , A. Bozek
  • , M. Bračko
  • , M. C. Chang
  • , Y. Chao
  • A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. G. Shiu, B. Shwartz, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhulanov, A. Zupanc

Research output: Contribution to journalArticlepeer-review

Abstract

We report improved measurements of time-dependent CP violation parameters for B0(B̄0)→ψ(2S)KS0. This analysis is based on a data sample of 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We fully reconstruct one neutral B meson in the ψ(2S)KS0 CP-eigenstate decay channel, and the flavor of the accompanying B meson is identified to be either B0 or B̄0 from its decay products. CP violation parameters are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays: Sψ(2S)KS0=+0.72±0.09(stat)±0.03(syst), Aψ(2S)KS0=+0.04±0.07(stat)±0.05(syst). These results are in agreement with results from measurements of B0→J/ψK0.

Original languageEnglish
Article number091103
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number9
DOIs
Publication statusPublished - 13 May 2008
Externally publishedYes

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