Search for dark matter with scalar or pseudoscalar coupling in Run 2 data

A sensitivity study for (pseudo)scalar coupling dark matter mediated by a scalar medi- ator in comparison with axial vector coupling dark matter mediated by a vector mediator has been performed. The analysis used data collected in 2015 with the CMS detector, at an LHC center-of mass energy of 13 TeV corresponding to an integrated luminosity of 41.9 pb−1. No significant deviation of the transverse mass distribution of the electron and neutrino system from the Standard Model prediction has been found. Expected limits have been determined at a 95% confidence level for all used models and the sensitivity is compared using different kinematic selections. The so called W′static selection yields the lowest cross section limits for all models, when using high pT -triggers. For low Mmed, the signal from the axial vector model with ξ=-1 yields the lowest cross section limits, while for high Mmed signals of pseudoscalar or scalar dark matter yield the lowest cross section limits. For 1, 3 and 10 fb−1of integrated luminosity expected limits are produced in order to provide an outlook for the sensitivity.