Effect of the Space-like Penguin Diagrams on CP Asymmetries in Exclusive B Decays

Abstract

The space-like penguin contributions were ignored on little ground in many previous studies of nonleptonic B decays and CP violation. Taking the penguin-dominated channels $B_u^{-}\to {\bar{K}}^0\pi$ and $B_u^{-}\to K^0{K}^{-}$ for example, we illustrate the non-negligible effects of the space-like penguin diagrams on CP asymmetries. Some quali- tative remarks are given on the gluonic penguin picture and the direct CP violation in exclusive two-body decays of B mesons.

Comments: 10 Latex pages, 2 figures. (Accepted for publication in Physics Letters B)