Abstract :
It has been known for many years that the Bd(t)→D(∗)∓{π±,ρ±,a1±} modes may involve observable CP violating effects. This note describes how to determine cleanly the Cabibbo-Kobayashi-Maskawa (CKM) phase φ=−2β−γ=−π+α−β, even in the presence of possible final state interactions. A discrete ambiguity remains.
