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

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.

6 pages, 4 figures, presented at 2007 Lepton-Photon Symposium (BELLE-CONF-0770). Modified version published in PRD(RC)

References in corpus (4)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Observation of Time-Dependent CP Violation in B0 -> eta' K0 Decays and Improved Measurements of CP Asymmetries in B0 -> phiK0, KsKsKs and B0 -> J/psi K0 Decays
• Improved Measurement of CP Violation in Neutral B Decays to c cbar s

Cited by in corpus (7)

• Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays
• Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons
• Analyses of decay constants and light-cone distribution amplitudes for s-wave heavy meson
• SU(3) symmetry breaking in decay constants and electromagnetic properties of pseudoscalar heavy mesons
• Measurement of the CKM angle ${\phi }_1$ in $B^0\to \bar{D}{}^{(\ast )0}{h}^0$, $\bar{D}{}^0\to K_S^0{\pi }^{+}{\pi }^{-}$ decays with time-dependent binned Dalitz plot analysis
• B Factories
• CKM-UT Angles: Mixing and CP violation at the $B$ Factories