Measurement of the γ angle from tree decays at the LHCb experiment

International audienceAn overview of plans for the measurement of gamma at the LHCb experiment will be shown. The gamma angle is the parameter of the CKM unitary triangle that is known least well. The LHCb experiment at the CERN LHC aims to perform precision b-physics and CP violation measurements, including improving the knowledge of gamma. Focus will be put on methods where B mesons decay at the tree level, within the Standard Model framework. The early data recorded by the experiment, from pp collisions at sqrt{s} = 7 TeV, has allowed observations of the first signals of the B decay modes that will be used to perform this measurement