On Measuring CP Violation in Neutral B-meson Decays at the Υ(4S) Resonance

الأصل · EN

Within the standard model we carry out an analysis of CP-violating observables in neutral B-meson decays at the Υ(4S) resonance. Both time-dependent and time-integrated CP asymmetries are calculated, without special approximations, to meet various possible measurements at symmetric and asymmetric e⁺e⁻ B factories. We show two ways to distinguish between direct and indirect CP-violating effects in the CP-eigenstate channels such as B⁰d/B⁰d→ π⁺π⁻ and π⁰ Kₛ. Reliable knowledge of the Cabibbo-Kobayashi-Maskawa phase and angles can in principle be extracted from measurements of some non-CP-eigenstate channels, e.g. B⁰d/B⁰d→ D±π∓ and (-)D⁽*⁾⁰Kₛ, even in the presence of significant final-state interactions.