Speaker
Juan Garcia Ferrero
(Universidad de Cantabria (ES))
Description
A search is performed for dark matter produced in association with tt pairs in data from proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC. The data correspond to 35.9 fb-1 collected with the CMS detector in 2016. The analysis looks for an excess of events with large imbalance in transverse momentum and a top quark pair. The results are interpreted in the context of simplified models of dark matter production. Assuming unitary coupling values to standard model (SM) particles g_q, and dark matter (DM) particles g_chi, and DM mass m_chi = 1 GeV, the observed (expected) 95% CL exclusions for a scalar mediator are m_phi < 55 (73) GeV, while no exclusion is expected or observed at 95% CL for the pseudoscalar mediators.
Primary author
Juan Garcia Ferrero
(Universidad de Cantabria (ES))
