We present measurements of the branching fractions of the decays B+→η′K+ and B0→η′K0. For B0→η′KS0 we also measure the time-dependent CP-violation parameters Sη′KS0 and Cη′KS0, and for B+→η′K+ the time-integrated charge asymmetry Ach. The data sample corresponds to 88.9×106 BB̅ pairs produced by e+e- annihilation at the Υ(4S). The results are B(B+→η′K+)=(76.9±3.5±4.4)×10-6, B(B0→η′K0)=(60.6±5.6±4.6)×10-6, Sη′KS0=0.02±0.34±0.03, Cη′KS0=0.10±0.22±0.04, and Ach=0.037±0.045±0.011.
Measurements of CP-Violating Asymmetries and Branching Fractions in B Meson Decays to η′K
LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;PATRIGNANI, CLAUDIA;TOSI, SILVANO;
2003-01-01
Abstract
We present measurements of the branching fractions of the decays B+→η′K+ and B0→η′K0. For B0→η′KS0 we also measure the time-dependent CP-violation parameters Sη′KS0 and Cη′KS0, and for B+→η′K+ the time-integrated charge asymmetry Ach. The data sample corresponds to 88.9×106 BB̅ pairs produced by e+e- annihilation at the Υ(4S). The results are B(B+→η′K+)=(76.9±3.5±4.4)×10-6, B(B0→η′K0)=(60.6±5.6±4.6)×10-6, Sη′KS0=0.02±0.34±0.03, Cη′KS0=0.10±0.22±0.04, and Ach=0.037±0.045±0.011.
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