Searches For The Supersymmetric Partner Of The Top Quark, Dark Matter And Dark Energy At The Atlas Experiment
by Nicolas Maximilian Köhler /
2019 / English / PDF
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Astrophysical observations implying the existence of Dark Matter and Dark Energy, which are not described by the Standard Model (SM) of particle physics, have led to extensions of the SM predicting new particles that can be directly produced at the Large Hadron Collider (LHC) at CERN. With 2015 and 2016 ATLAS proton-proton collision data, I present searches for the supersymmetric partner of the top quark, for Dark Matter, and for Dark Energy, in signatures with jets and missing transverse energy. Muon detection is key to some of the most important LHC physics results, including the discovery of the Higgs boson and the measurement of its properties. The efficiency with which muons can be detected with the ATLAS detector is measured using $Z$ boson decays. The performance of high-precision Monitored Drift Tube muon chambers under background rates similar to the ones expected for the High Luminosity-LHC is studied.
