Books

This thesis presents the first global interpretation of the measurements of doubledifferentialcross sections of inclusive jet and top quark-antiquark pair (tt) productionin proton-proton collisions at the Large Hadron Collider (LHC) at the center ofmass energy of √s = 13TeV, together with inclusive measurements in Deep Inelasticelectron-proton Scattering (DIS) at HERA. The LHC data have been recordedby the Compact Muon Solenoid (CMS) experiment in 2016, and correspond to theintegrated luminosity of 33.5 fb−1 for inclusive jet measurement or 35.9 fb−1 for the ttmeasurement.This novel analysis is performed at next-to-leading order (NLO) of perturbative quantumchromodynamics (QCD), where the inclusive neutral and charged current DISmeasurements at HERA, the CMS jet measurements and the normalized triple-differentialcross sections of tt production are used together to constrain the parametersof QCD and impose constraints on new physics. [...]

In this thesis, measurements are presented using proton-proton collision data at s =13 TeV collected by the CMS experiment in the years 2016, 2017, and 2018, corresponding to an integrated luminosity of 138 fb−1. New results on single top quark production in association with a Z boson (tZq) are presented. [...]

This thesis deals with calculations of higher-order corrections in perturbative quantum chromodynamics(QCD). The two-mass contributions to the 3-loop, polarized twist-two operator matrixelements (OMEs) A(3),PSQq and A(3)gg,Q are calculated. [...]

The understanding of the theory of strong interactions in the context of the Standard Model is of great interest to particle physics and its developments. The measurements andthe improvement of the theoretical predictions would allow us to get closer to future findings of new physics by discriminating better between backgrounds produced mainly by stronginteractions. [...]