002842946 001__ 2842946 002842946 005__ 20230727181737.0 002842946 0248_ $$aoai:cds.cern.ch:2842946$$pcerncds:FULLTEXT$$pcerncds:THESES$$pcerncds:CERN:FULLTEXT$$pINIS$$pcerncds:CERN 002842946 037__ $$aCERN-THESIS-2022-233 002842946 041__ $$aeng 002842946 100__ $$0AUTHOR|(CDS)2216300$$0AUTHOR|(SzGeCERN)810921$$aPetersen, Henriette [email protected]$$uHamburg U. 002842946 245__ $$aMeasurements of differential cross sections for the production of top quark pairs in pp collisions at $\sqrt{s} = 13$ TeV with the CMS experiment 002842946 269__ $$c24/06/2022 002842946 300__ $$a362 p 002842946 500__ $$aPresented 24 Jun 2022 002842946 502__ $$aPhD$$bHamburg U.$$c2022 002842946 520__ $$aIn this thesis, measurements of differential cross sections of top quark pair ($t\bar{t}$) production in proton-proton (pp) collisions at $\sqrt{s}=13 \text{ TeV}$ are presented. The analysis is based on data obtained with the CMS experiment during 2016, 2017 and 2018 in Run 2 of the LHC, which corresponds to an integrated luminosity of 137.6 fb$^[-1]$. In this period of time more than 100 million $t\bar{t}$ pairs were produced in the pp collisions, facilitating an unprecedented precision in measurements of kinematic spectra and topologies in these events. The analysis is performed using the dileptonic decay channel. Differential $t\bar{t}$ production cross sections are measured in bins of the kinematic properties of the $t\bar{t}$ system, the top quarks and their visible decay products, the charged leptons and beauty flavoured jets. The cross section extraction is based on an event-counting method using reconstructed distributions, where detector effects such as resolutions, acceptances and efficiencies are corrected through a regularized unfolding procedure. The measurements are presented in the full phase-space at parton level and/or in the fiducial phase space at particle level. Both absolute and normalized cross sections are provided. All measurements are compared to alternative MC predictions based on next-to-leading order (NLO) QCD models matched to parton showers and some selected results are also compared to theoretical predictions beyond NLO precision in QCD. Most cross sections are measured single-differentially as functions of one kinematic observable, but also some double-differential cross sections are extracted as functions of two observables. 002842946 595__ $$aCERN EDS 002842946 65017 $$2SzGeCERN$$aParticle Physics - Experiment 002842946 690C_ $$aCERN 002842946 690C_ $$aTHESIS 002842946 693__ $$aCERN LHC$$eCMS 002842946 693__ $$sNot applicable 002842946 701__ $$aBehnke, Olaf$$edir.$$uHamburg U. 002842946 701__ $$aGallo, Elisabetta$$edir.$$uHamburg U. 002842946 710__ $$5EP 002842946 859__ [email protected] 002842946 8564_ $$82411788$$s22428011$$uhttps://cds.cern.ch/record/2842946/files/CERN-THESIS-2022-233.pdf$$yFulltext 002842946 916__ $$sn$$w202248$$ya2022 002842946 963__ $$aPUBLIC 002842946 960__ $$a14 002842946 980__ $$aTHESIS