| Abstract |
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We present measurements of time-dependent CP-violation asymmetries for
the decays B0 to eta'K0. The data sample corresponds to 347 million BBbar
pairs produced by e+e- annihilation at the Upsilon(4S) resonance in the
PEP-II collider, and collected with the BaBar detector. The
preliminary results are S = 0.55+\-0.11+\-0.002, and C = -0.15+\-0.07+\-0.03, where
the first error quoted is statistical, the second systematic.
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