# Triple-Differential Measurement of the Dijet Cross Section at $\sqrt{s}$ = 13 TeV with the CMS Detector

Savoiu, Daniel

##### Abstract (englisch):
In light of the large quantity of data collected during the second operational run of the Large Hadron Collider (LHC) at CERN, which has made it possible to perform measurements at unprecedented energies with a high degree of statistical precision, the necessity of understanding and constraining the systematic effects on such measurements has become increasingly important. Precision measurements of jet observables in proton-induced collisions have proven instrumental in constraining the parton distribution functions (PDFs) which describe the internal structure of protons, and which remain one of the largest sources of uncertainty in many analyses performed at hadron colliders.

This thesis presents the first triple-differential measurement of the dijet production cross section performed in proton-proton collisions at a center-of-mass energy of 13 TeV, based on a data sample of 35.9 fb$^{-1}$ recorded by the CMS experiment at the Large Hadron Collider at CERN. The cross section is measured using anti-$k_\text{T}$ jets with radius parameters of R = 0.4 and R = 0.8 as a function of the dijet rapidity separation $y^{*}$ , the total boost of the dijet system $y_\text{b}$ , and either the average transverse momentum $\langle p_\text{T}\rangle_{1,2}$ or the invariant mass $m_\text{jj}$ of the dijet system as the third variable. ... mehr

 Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP) Publikationstyp Hochschulschrift Publikationsdatum 01.03.2021 Sprache Englisch Identifikator KITopen-ID: 1000129970 Verlag Karlsruher Institut für Technologie (KIT) Umfang vi, 140 S. Art der Arbeit Dissertation Fakultät Fakultät für Physik (PHYSIK) Institut Institut für Experimentelle Teilchenphysik (ETP) Prüfungsdatum 10.07.2020 Referent/Betreuer Prof. G. Quast Schlagwörter high-energy physics, particle physics, cern, lhc, jet physics, jets, hadronic jets, particle jets, cross section, quantum chromodynamics, qcd, cms, cms experiment, large hadron collider
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