Angular analysis and CP violation studies in B decays at CMS

Angular distributions of the decay $B^0 \to K^{*0} \mu^+\mu^-$ are a clean probe of physics beyond the standard model. In particular the forward-backward asymmetry and other variables which can be determined as a function of $q^2$, provide fruitful information from a single decay channel. An angular and proper decay time analysis is applied to the $B_s \to J/\psi \phi$ decays. The $B_s$ signal candidates are reconstructed and used to extract the mixing phase $\phi_s$. The theoretical prediction of the $\phi_s$ angle is particularly robust, thus any deviation from the prediction can be a smoking gun signal of new physics.