The Complete $|\Delta S|=2$ Hamiltonian in the Next-To-Leading Order and its Phenomenological Implications

Abstract

We briefly sketch the calculation of the effective low-energy $|\Delta S|=2$-hamiltonian in the next-to-leading order of renormalization group improved perturbation theory. The result for the coefficient $\eta_3^\star$ is discussed. Further we present a 1996 update of our phenomenological analysis of the unitarity triangle where we include the information available on $B^0-\bar{B^0}$-mixing.