Search for new physics in the mono-electron channel with the CMS experiment in pp collision data at $\sqrt{s}$ = 13 TeV

This thesis presents the search for new physics in the mono-electron channel using proton-proton collision data with a center-of-mass energy of √ s = 13 TeV recorded at the LHC in 2015 by the CMS experiment. The recorded data is compared to the Standard Model prediction in the transverse mass distribution. The deviations between data and the Standard Model prediction are analyzed in terms of interpretations be- yond the Standard Model. The interpretations include the production of a heavy W′ vector boson and the production of dark matter through simplified models. The data is interpreted as 95% CL exclusion limits. The production of a W′ boson can be excluded for masses up to 3.75 TeV. Simplified models are used to model the dark matter production mechanism. The sensitivity of this study is presented in terms of excluded mediator masses Mmed and dark matter masses mDM for axial-vector, vector, scalar and pseudoscalar coupling mediator models. The influence of the future High-Luminosity LHC upgrade on the dark matter search in the mono-electron channel is investigated, along with CMS detector upgrades. The increased sensitivity is evaluated for a simplified model with an axial-vector coupling mediator.