Study of $Z' \rightarrow e^(+)e^(-)$ in full simulation with regard to discrimination between models beyond the standard model, ATLAS@CERN

Although experimental results so far agree with predictions of the Standard Model, it is widely felt to be incomplete. Many prospective theories beyond the Standard Model predict extra neutral gauge bosons, denoted by Z', which might be light enough to be accessible at the LHC. Observables sensitive to properties of these extra gauge bosons might be used to discriminate between the different theories beyond the Standard Model. In the present work several of these observables (total decay width, leptonic cross-section and forward-backward asymmetries) are studied at generation level and with a full simulation in the ATLAS detector. The Z' -> e^+e^- decay channel was chosen and two values for the mass of the Z': 1.5TeV and 4TeV. Background is studied as well and it is confirmed that a Z' boson could easily be discovered at the chosen masses. It is shown that even in full simulation the studied observables can be determined with a good precision. In a next step a discrimination strategy has to be developed given the presented methods to extract the variables and their precision.Aucu