Kozhushko A. Searching for the signals of new heavy neutral vector boson in hadron scattering processes

In the present thesis, we investigate signals of a new heavy neutral gauge boson (Z' boson) in high-energy hadron scattering processes. We consider a model-independent parameterization of Z' interactions with Standard model particles and investigate Z' input to the Drell-Yan scattering at the LHC and Tevatron colliders. Using standard approach of quantum field theory and a set of popular tools for analytic calculations and computational simulation, we build a package for computation of Z' parameters in the considered scattering process. We calculate Z' contributions to the scattering cross section at energies over 2 TeV in the narrow width approximation and compare these results to the direct searches data collected at the LHC. It is shown that the available LHC data for 8 TeV collision energy will constrain the upper bound for axial and vector Z' couplings at least one order lower than the LEP experimental data did. The upper bound for mass mixing angle between standard-model Z boson and Z' boson is determined to be 10^(-4). We also consider the energy region corresponding to the Z boson resonance (60-120 GeV), where the leading Z' contribution arises from the Z-Z' mixing. We propose two-parametric observables for Z' searches at these energies. It is also shown that in case of generation-universal Z' couplings to the standard-model fermions it is possible to construct a one-parametric observable.