Indications for large rescattering in rare B decays

Abstract

The sign of A_CP(K^–π⁺) < 0, the evidence for $\bar B^0 \to \pi^0\pi^0$, and the possibly sizable A _{π π} and S _{π π} in $\bar B^0 \to \pi^+\pi^-$ all suggest that final state rescattering may be needed in $\bar B\to PP$ decay, which is echoed by large color suppressed $\bar B^0\to D^0h^0$ modes. An SU(3) formalism of $\mbox{\bf 8}\otimes \mbox{\bf 8} \to \mbox{\bf 8}\otimes \mbox{\bf 8}$ rescattering in PP final states leads to interesting predictions, in particular allowing for small $\bar B^0 \to K^-K^+$.

PACS: 11.30.Hv Flavor symmetries – 13.25.Hw Decays of bottom mesons