ATLAS measurements of CP violation and rare decays processes with beauty mesons

The ATLAS experiment has a rich B physics program including measurements of CP violation in B meson decays and studies of rare FCNC decays of B mesons as sensitive probes of physics beyond the SM. In this talk, recent studies of the CP violating phase {\phi}_{s} in B^{0}_{s}{\to} J/{\Psi}{\phi} and of the rare decay of B^{0} and B^{0}_{s} to muon pairs are highlighted.