Indications for Large Rescattering in Rare B Decays

Abstract

The sign of $A_{\mathrm{CP}}(K^{-}{\pi }^{+})<0$, the evidence for ${\bar{B}}^0\to {\pi }^0{\pi }^0$, and the possibly sizable $A_{\pi \pi }$ and $S_{\pi \pi }$ 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 ${\bar{B}}^0\to D^0{h}^0$ modes. An SU(3) formalism of $8\otimes 8\to 8\otimes 8$ rescattering in $PP$ final states leads to interesting predictions, in particular allowing for small ${\bar{B}}^0\to K^{-}{K}^{+}$.

Comments: 3 pages, 3 figures. Talk presented at EPS2003 Conference, Aachen, Germany, July 2003