Final state interaction in decays B----->Kaon Pion

Abstract

We discuss the rescattering effects in decays $B\to \pi +K$. The picture we take is very simple: first, B decay into $K\ast \rho$, then $K\ast$ and $\rho$ go to kaon and pion by exchanging a pion. We find a up to ten percent CP violation asymmetry rate. We also discuss its correction to the constraint of angle $\gamma$ proposed recently.

arXiv comment9 pages, latex, 1 ps figures