The Measurement of Time-Dependent CP-Violating Asymmetries in Loop-Dominated B Decays with BABAR

Details The Measurement of Time-Dependent CP-Violating Asymmetries in Loop-Dominated B Decays with BABAR The Measurement of Time-Dependent CP-Violating Asymmetries in Loop-Dominated B Decays with BABAR

2004-10-22

arxiv.org/abs/hep-ex/0410069v1

Physics

High Energy Physics

High Energy Physics - Experiment

Talk given at the 32nd International Conference on High-Energy Physics (ICHEP'04), Beijing, China, August 2004; 5 pages, 2 fig

Scientific paper

We report on preliminary measurements of time-dependent CP asymmetries in neutral B decays to CP eigenstates with transition amplitudes that are dominated by penguin-type loops. The results are obtained from a data sample of up to 227 million Upsilon(4S)->BB-bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B-meson Factory at SLAC. The amplitudes of the effective mixing-induced CP asymmetries, sin(2beta)_eff, are derived from decay-time distributions of events in which one neutral B meson is fully reconstructed in a final state without charm and the other B meson is determined to be either a B0 or B0-bar from its decay products.

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