CP searches in CMS experiment

Although CP violation was discovered forty years ago, its origin is still unknown. In this thesis, CP violating effects which have been seen in K decays are described and how CP violation can be caused by the Standard Model (SM) weak interaction is explained. The hypothesis that this interaction is indeed the origin of CP violation will be incisively tested by future experiments on B and K decays. The large number of bb events at LHC will offer the possibility to study CP violation in the B system. We discussed the potential of the CMS dedector for the measurements the angles a, B and y of the unitarity triangle during the initial low luminosity phase of the LHC.Key Words: CP, CKM, Unitarity Triangle, CMS II