# Jet energy calibration and triple differential inclusive cross section measurements with Z (→μμ) + jet events at 13 TeV recorded by the CMS detector

Berger, Thomas

## Abstract (englisch):

This thesis presents two substantial aspects of the analysis of Z boson production in association with jets, where the Z boson decays to a muon-antimuon pair: jet energy calibration and triple differential cross section measurements.
Data have been used that were recorded with the CMS detector in the year 2016 at a center-of-mass energy of 13 TeV. These data correspond to an integrated luminosity of 35.9 fb$^{-1}$ of proton-proton collisions at the LHC.

The first part of this thesis contributes to the jet energy calibration in CMS by estimating residual corrections that account for differences in jet reconstruction between measurement and simulation. Correction factors are extracted from Z (→ μμ) + jet events by comparing the transverse momentum of a jet to the one of a balancing Z boson, which can be reconstructed very precisely from muons.

The second part of this thesis presents triple differential measurements of inclusive cross sections for Z (→μμ) + jet production. The cross sections are measured as a function of the Z boson transverse momentum $p_T^Z$ or alternatively the variable $\phi^*_\eta$, the rapidity separation $y^*$ of the Z boson and the leading jet, and the boost $y_b$ of their center-of-mass system. ... mehr

 Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP) Publikationstyp Hochschulschrift Publikationsjahr 2019 Sprache Englisch Identifikator KITopen-ID: 1000104286 Verlag Karlsruher Institut für Technologie (KIT) Umfang III, 139 S. Art der Arbeit Dissertation Fakultät Fakultät für Physik (PHYSIK) Institut Institut für Experimentelle Teilchenphysik (ETP) Prüfungsdatum 25.10.2019 Referent/Betreuer Quast, G.
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