Measurement of CP-Violating Asymmetries in B0 Decays to CP Eigenstates
Abstract
We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23×106 ϒ\(4S\)-->BB¯ decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2β, is derived from the decay time distributions in such events. The result is sin2β = 0.34+/-0.20 \(stat\)+/-0.05 \(syst\).
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2001
- DOI:
- 10.1103/PhysRevLett.86.2515
- arXiv:
- arXiv:hep-ex/0102030
- Bibcode:
- 2001PhRvL..86.2515A
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- 9 pages, 2 postscript figures, accepted for publication in Physical Review Letters