Constraints of mixing matrix elements in the sequential fourthgeneration model

Abstract

We review our works on the sequential fourth generation model and focus on the constriants of $4\times 4$ quark mixing matrix elements. We investigate the quark mixing matrix elements from the rare $K,B$ meson decays. We talk about the $hierarchy$ of the $4\times 4$ matrix and the existence of fourth generation.

14 pages, 4 figures, submitted to PRD