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Measurements of time-dependent CP violation in B^0 -> psi(2S) K_S decays

Authors
  • Sahoo, H.
  • Browder, T. E.
  • Trabelsi, K.
  • Collaboration, for the Belle
Type
Published Article
Publication Date
May 27, 2008
Submission Date
Aug 20, 2007
Identifiers
DOI: 10.1103/PhysRevD.77.091103
Source
arXiv
License
Unknown
External links

Abstract

We report improved measurements of time-dependent CP violation parameters for B^0(\bar{B}^0) -> psi(2S) K_S. This analysis is based on a data sample of 657x10^6 BBbar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We fully reconstruct one neutral B meson in the psi(2S) K_S CP-eigenstate decay channel, and the flavor of the accompanying B meson is identified to be either B^0 or \bar{B}^0 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: S (psi(2S) K_S) = +0.72 +/- 0.09(stat) +/- 0.03(syst), A (psi(2S) K_S) = +0.04 +/- 0.07(stat) +/- 0.05(syst). These results are in agreement with results from measurements of B^0 -> J/psi K^0.

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