Search for new physics in pp collision events with one electron and missing transverse energy using CMS data

In this thesis, a search for new physics in the electron + missing transverse energy channel is presented based on proton-proton collisions measured with the CMS detector at the LHC. The whole 2012 CMS dataset is used, which amounts to 20 fb−1 of collision data recorded at a center-of-mass energy of 8 TeV. In many extensions of the Standard Model of particle physics, the existence of addi- tional charged bosons called W′ is predicted. For this search, a simple W′ model with Standard Model-like properties is used as benchmark model with three different sce- narios. Two of the three scenarios include interference effects between the W′ and the Standard Model W. An additional interpretation is done in terms of an effective four fermion contact interaction theory. No significant deviation from the Standard Model prediction is found. For the deter- mination of exclusion limits on the parameters of the new theories, a multi-bin method was used which is a generalization of the methods used in previous searches and pub- lications of the same kind. This allows the inclusion of signal regions with destructive interference into the limit calculation. The W′ scenario without interference can be excluded at 95% CL for W′ masses up to 3.24 TeV. In the interference scenarios, the exclusion limits extend to 3.40 TeV and 3.55 TeV respectively. The four fermion contact interaction can be excluded for energy scales up to 12.0 TeV. A similar analysis was performed in the muon channel and will be published together with the results from this thesis [1].