Search for new physics with same-sign isolated dilepton events in CMS

One of the main goals of LHC is the discovery of new physics (NP) beyond the standard model (BSM). Many strategies to get a hint of NP have been proposed and studied: one of these is the search for events in which two same-sign leptons are present. This topology is very rare in the Standard Model, while it is present in many BSM models. An inclusive search for the presence of new physics in events with two isolated same sign leptons, using 5.0 f b−1 of data taken in 2011 by CMS is presented. The observed data are compatible with the predictions of the SM. The results are interpreted in terms of limits of a supersymmetric model.