Weak Phases and CP Violation

Time-dependent CP asymmetries in B0 decays from interference of B0- mixing and , , , and direct asymmetries from interference of and are studied, improving errors in the weak phases β and γ to ±1° and ±7°, respectively. Two kinds of tests for New Physics are discussed: 1. Deviations of asymmetries in decays from sin(2β)sin(Δmt). 2. Violation of a sum rule for direct asymmetries in B→Kπ.