Search for Supersymmetric Electroweak Production and the Measurement of Higgs Production Cross-sections at the ATLAS Experiment
Date
2020
Authors
Oliver, Jason
Editors
Advisors
Jackson, Paul
White, Martin
White, Martin
Journal Title
Journal ISSN
Volume Title
Type:
Thesis
Citation
Statement of Responsibility
Conference Name
Abstract
This thesis presents a search for electroweak production of supersymmetric particles in two-lepton and three-lepton final states. The search uses the data collected from 2015 to 2018 by the ATLAS experiment in root s = 13 TeV proton–proton collisions at the CERN Large Hadron Collider, which corresponds to an integrated luminosity of 139.9 fb−1. We present the results of this search using model-independent upper limits. We also present a measurement of the Higgs boson gluon–gluon fusion production cross-section, via the H ->WW -> ℓvℓv final state, we use the data collected in 2015 by the ATLAS experiment, which corresponds to an integrated luminosity of 36.1 fb−1. We measure the cross-section of gluon–gluon fusion Higgs production and subsequent decay via WW to be 11.4+2.2 −2.1 pb (statistical and systematic). Finally, we outline prospects in future upgrade works, in the fast simulation of the Fast Tracker ATLAS subsystem and the development of digitisation software in the ATLAS Inner Tracker Strips Detector.
School/Discipline
School of Physical Sciences
Dissertation Note
Thesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 2020
Provenance
This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals