Indications for large rescattering in rare B decays

Abstract

The sign of ACP(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