Study of the acceptance for the process p p ---> Z ---> e e at the ATLAS detector

One of the main goals of the ATLAS detector is the precise measurement of the process pp → Z. In this thesis the geometric and kinematic acceptance and its systematic uncertainty is studied for the decay channel Z → e +e −. Different Monte Carlo generators, with leading as well as next-toleading order matrix elements, are used for the determination of the uncertainty on the acceptance by varying or disabling various effects. The considered effects are Final and Initial State Radiation, the Underlying Event, Parton Density Functions as well as the transverse momentum of the partons inside the proton. Additionally, the acceptance and its uncertainty are determined based on events which are passed through the detector simulation and event reconstruction.