BABAR explores CP violation

Abstract

The most recent results obtained by the BABAR experiment at the PEP-II asymmetric-energy B Factory at SLAC on CP-violating asymmetries and branching fractions for neutral and charged B decays are presented here. The analysis was performed on a data sample of ∼ 88 million γ (4 S) → B B decays collected between 1999 and 2002. Using b → c cs decays, we measure sin2 β = 0.741 ± 0.067 (stat) ± 0.034 (syst). We also present sin2β measurements from, b → s ss and b → c cd processes . From neutral B meson decays to two-body final states of charged pions and kaons, we derive for the CP violating parameters, S ππ = 0.02 ± 0.34 ± 0.05 [− 0.54, +0.58] and C ππ = − 0.30 ± 0.25 ± 0.04 [− 0.72, +0.12]. First results for B → π + π − π 0 and K ± π ∓ π 0 final states dominated by the ϱ ± resonance, are also presented.