Measurement of the fiducial differential cross-section of top quark pair production in the dilepton final state at 8 TeV

Gul, Umar (2018) Measurement of the fiducial differential cross-section of top quark pair production in the dilepton final state at 8 TeV. PhD thesis, University of Glasgow.

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Printed Thesis Information: https://eleanor.lib.gla.ac.uk/record=b3304963

Abstract

The top quark is the most massive fundamental particle of the Standard Model of particle physics and being the only quark which decays before hadronization gives a unique opportunity for studying Quantum Chromodynamics (QCD). This dissertation presents a measurement of differential cross-sections of top quark pairs decaying in a purely leptonic mode as a function of the dilepton invariant mass, transverse momentum, difference in the pseudorapidity and azimuthal angle between two leptons in the same event at 8 TeV proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider. This data corresponds to an integrated luminosity of 20.3 fb−1. Events with top quark pair signatures are selected in the dilepton channel in the ATLAS acceptance (two leptons with pT < 25 GeV and |η| > 2.5). The measured cross-sections are compared to the Standard Model predictions generated using current Monte Carlo generators. All the measurements are found to be in agreement with the SM.

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Keywords: Fiducial differential cross-section.
Subjects: Q Science > QC Physics
Colleges/Schools: College of Science and Engineering > School of Physics and Astronomy
Supervisor's Name: Buttar, Professor Craig
Date of Award: 2018
Depositing User: Umar Gul
Unique ID: glathesis:2018-8858
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 12 Mar 2018 14:29
Last Modified: 24 Apr 2018 12:59
URI: http://theses.gla.ac.uk/id/eprint/8858

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