Speakers
Description
In this talk the latest CMS results regarding a search for dark matter produced in association with top quarks are presented, together with an update about the current CMS effort with Run 3 data. The aforementioned results use the Run 2 data collected with the CMS detector at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to 138 fb−1 of integrated luminosity. An excess of events with a large imbalance of transverse momentum is searched for across 0, 1 and 2 lepton final states. Novel multivariate techniques are used to take advantage of the differences in kinematic properties between the two DM production mechanisms. No significant deviations with respect to the standard model predictions are observed. The results are interpreted considering a simplified model in which the mediator is either a scalar or a pseudoscalar particle.