Measurement of time-dependent CP violation in B 0 → η′K 0 decays

KEKB Electron–positron annihilation CP violation
DOI: 10.1007/jhep10(2014)165 Publication Date: 2014-11-03T04:45:44Z
AUTHORS (166)
ABSTRACT
We present a measurement of the time-dependent $CP$ violation parameters in $B^0\to\eta'K^0$ decays. The is based on full data sample containing $772\times 10^6$ $B\bar{B}$ pairs collected at $\Upsilon(4S)$ resonance using Belle detector KEKB asymmetric-energy $e^+e^-$ collider. measured values mixing-induced and direct are: \begin{align} \sin 2 \phi^{\rm eff}_1 &= +0.68\pm 0.07 \pm 0.03, \nonumber \\ \mathcal{A}_{\eta'K^0} +0.03\pm 0.05\pm 0.04, \end{align} where first uncertainty statistical second systematic. obtained are most accurate to date. Furthermore, these results consistent with our previous measurements world-average value $\sin 2\phi_1$ $B^0\to J/\psi K^0$ decays.}
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