Abstract
It is usually suggested to measure the three angles ϕ1, ϕ2 and ϕ3 of the KM unitarity triangle via the CP asymmetries in the reactionsBd→ψKS,Bd→ππ andBs→KSρO respectively. There are obviously many major obstacles to the successful completion of such a program; of those two will be addressed in this note: (i) The CP asymmetry inBd→ππ could a priori be affected by strong final state interactions that depend on long distance dynamics. (ii) The expected rapid rate of\(B_s - \bar B_s\) oscillations will make it very difficult to measure CP asymmetries inBs decays. I describe various methods for extracting ϕ2 and ϕ3 directly from CP asymmetries inBd decays even in the presence of significant strong final state interactions.
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