Measurement of Time-Dependent $CP$-Violating Asymmetries in ${B}^{0}\ensuremath{\rightarrow}{K}_{s}^{0}{K}_{s}^{0}{K}_{s}^{0}$ Decay

Measurement of Time-Dependent $C P$ -Violating Asymmetries in $B^{0} \to K_{s}^{0} K_{s}^{0} K_{s}^{0}$ Decay

K. Sumisawa et al. (Belle Collaboration)

Phys. Rev. Lett. 95, 061801 – Published 1 August 2005

Abstract

We present a measurement of $C P$ -violation parameters in the $B^{0} \to K_{S}^{0} K_{S}^{0} K_{S}^{0}$ decay based on a sample of $275 \times 10^{6}$ $B \bar{B}$ pairs collected at the $Υ (4 S)$ resonance with the Belle detector at the KEKB energy-asymmetric $e^{+} e^{-}$ collider. One neutral $B$ meson is fully reconstructed in the decay $B^{0} \to K_{S}^{0} K_{S}^{0} K_{S}^{0}$ , and the flavor of the accompanying $B$ meson is identified from its decay products. $C P$ -violation parameters are obtained from the asymmetry in the distributions of the proper-time interval between the two $B$ decays: $S = + 1.26 \pm 0.68 (stat) \pm 0.20 (syst)$ and $A = + 0.54 \pm 0.34 (stat) \pm 0.09 (syst)$ .