Determination of non-perturbative corrections in Z+jets production at the LHC using iterative methods

Abstract

The aim of the presented thesis was to determine non-perturbative corrections in Z+jets production at the LHC using iterative unfolding. By using the event generator SHERPA, Z+jets events were simulated on hadron and parton level, which were analysed with the program Rivet afterwards. A lot of observables with different sensitivity for non-perturbative effects were examined. Eventually by using RooUnfold a response matrix object could b e created, which contained information about the non-perturbative corrections. Finally another parton level distribution was unfolded with two different metho ds by using the response matrix object. The results of the unfolding was then used to compare these methods. The first method was the bin-by-bin method and the second one was the iterative unfolding