Fourth generation CP violation effects on B→Kπ, φK, and ρK in next-to-leading-order perturbative QCD

We study the effect from a sequential fourth generation quark on penguin-dominated two-body nonleptonic B meson decays in the next-to-leading order perturbative QCD formalism. With an enhancement of the color-suppressed tree amplitude and possibility of a new CP phase in the electroweak penguin amplitude, we can account better for A(CP)(B-0 -> K+pi(-))-A(CP)(B+-> K+pi(0)). Taking vertical bar V(t)(')sV(t)(')b vertical bar similar to 0.02 with a phase just below 90 degrees, which is consistent with the b -> s center dot(+)center dot(-) rate and the B-s mixing parameter Delta m(Bs), we find a downward shift in the mixing-induced CP asymmetries of B-0 -> K-S pi(0) and phi K-S. The predicted behavior for B-0 ->rho K-0(S) is opposite.