I discuss some recent results on the systematic behavior of final state rescattering which makes use of the limit of a heavy B meson. The results suggest that soft final state interactions do not disappear in the large $m_B$ limit. Soft and hard final state phases can both contribute to CP violating asymmetries in B decay. The way that the soft phases occur is interesting theoretically and suggests the violation of local quark-hadron duality.
Donoghue, John, "Final state interactions in the decay of heavy quarks" (1996). Physics Department Faculty Publication Series. 244.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/244