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Differential measurements of Z and γ bosons produced with jets at the CMS experiment

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Title: Differential measurements of Z and γ bosons produced with jets at the CMS experiment
Authors: Zecchinelli, Angelo Giacomo
Item Type: Thesis or dissertation
Abstract: This thesis presents measurements of the differential cross-sections of Z + jets and γ + jets, and their ratio, as a function of the boson transverse momentum. In addition, a description of measurements of the angular distribution between the Z boson direction and a jet in events where the Z boson is emitted collinear with a jet is reported. The analysis is based on a data sample of proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 inverse fb recorded by the CMS experiment at the LHC. The data are compared to different theoretical predictions after correcting for detector effects. In general, the predictions at higher orders in perturbation theory show better agreement with the data. These results represent the first measurement of the differential cross-section ratio of Z + jets and γ + jets at 13 TeV and the first explicit measurement of collinear Z emission.
Content Version: Open Access
Issue Date: Mar-2021
Date Awarded: Oct-2021
URI: http://hdl.handle.net/10044/1/92919
DOI: https://doi.org/10.25560/92919
Copyright Statement: Creative Commons Attribution NonCommercial Licence
Supervisor: Malik, Sarah
Davies, Gavin
Sponsor/Funder: The Royal Society
Department: Physics
Publisher: Imperial College London
Qualification Level: Doctoral
Qualification Name: Doctor of Philosophy (PhD)
Appears in Collections:Physics PhD theses

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