November 16, 2022 Master Thesis Open Access

Verstege, Cedric

MARC21 XML Export

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    <subfield code="a">Measurement of the Triple-Differential Cross-Section of Z+Jet Production with the CMS Detector at 13 TeV</subfield>
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    <subfield code="a">&lt;p&gt;For understanding and interpreting particle interactions at hadron colliders, the description of the hadrons&amp;rsquo; constituents is essential, since hadrons are not fundamental particles. The constituents of a hadron, the partons, each carry a different momentum fraction of the total hadron. These momentum fractions are described by the so-called parton distribution functions (PDFs). Due to the factorization theorem of Quantum Chromodynamics (QCD), the PDFs are the same for all scattering processes.&lt;/p&gt;

&lt;p&gt;Multiple different production channels are expected to improve the precision of the experimentally obtained PDFs, including vector boson production in association with a jet. The presented analysis covers this crucial ingredient in the context of the Z boson production with at least one jet. A triple differential measurement provides an insight into the different contributions from the proton&amp;rsquo;s constituents to the Z+jet production in different regions of the analyzed phase space.&lt;/p&gt;

&lt;p&gt;The triple-differential inclusive cross-section is measured as a function of three different kinematic variables, namely the transverse momentum of the Z boson, the difference in rapidity between the Z boson and the jet, as well as the boost of the center-of-mass system. Those variables allow for a suitable division of the phase space in order to obtain a better sensitivity to the partonic sub-processes and the initial state parton momenta. The presented measurement is expected to contribute to a more precise determination of the PDFs, especially the gluon PDF.&lt;/p&gt;</subfield>
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