Lifetime, mixing and CP violation measurements in ATLAS

Talk will give an overview of the ATLAS results of lifetime, mixing, and CP violation in the B0 and B0s systems. In the Standard Model CP violation is described by a phase in the CKM matrix. One of the manifestations of this complex phase is a shift between direct and mixing-mediated B0s decays producing a common final state. In the case of B0s -> J/PsiPhi this phase shift is predicted to be small Phis = -0.0368 +- 0.0018 rad. New physics can enhance Phis whilst satisfying all existing constraints. The measurement of the lifetime dependence of B0 -> J/ PsiKs and B0 -> J/Psi K*0 decays was then used to extract the most precise value of delta Gammad/Gammad.