Cp Violation Studies with Babar (sin 2β, sin 2α and Direct Cpv Searches)

Details Cp Violation Studies with Babar (sin 2β, sin 2α and Direct Cpv Searches) Cp Violation Studies with Babar (sin 2β, sin 2α and Direct Cpv Searches)

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003fuin.conf..372t&link_type=abstract

FUNDAMENTAL INTERACTIONS. Proceedings of the Seventeenth Lake Louise Winter Institute. Held 17-23 February 2002 in Lake Louise,

Physics

Scientific paper

We present the searches for direct CP violation in charmless two-body B decays, quasi two-body B decays and radiative penguin decays B → K*γ, using a sample of 22.7 million Bbar B events collected with the BABAR detector at the PEP-II collider. No evidence for direct CP violation is found and 90% confidence level limits are reported. A larger sample of 33 million Bbar B events is used for a measurement of time-dependent CP-violating asymmetries in neutral B mesons decays to several CP eigenstates. We measure sin 2β = 0.59 ± 0.14(stat) ± 0.05(syst), which constitutes an observation of CP violation in the B0 meson system at the 4.1σ level. Results from a study of CP violation in the decay B0 to π+π- are also presented.

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