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 reactionsB d →ψK S ,B d →ππ andB s →K S ρO 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 inB d →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 inB s decays. I describe various methods for extracting ϕ2 and ϕ3 directly from CP asymmetries inB d decays even in the presence of significant strong final state interactions.
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References
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Bigi, I.I. Measuring and fully testing KM unitarity in\(\Upsilon (4S) \to B_d \bar B_d\) decays. Z. Phys. C - Particles and Fields 51, 267–274 (1991). https://doi.org/10.1007/BF01475794
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DOI: https://doi.org/10.1007/BF01475794