Higgs boson studies: associated production with a vector boson and decay into b-quarks using the ATLAS Run-2 dataset
| Autor: | Spiteri, Dwayne |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics::Instrumentation and Detectors
High Energy Physics::Experiment Physics Particle Physics Particle Physics Theory Standard Model SM Beyond Standard Model Physics BSM Higgs Boson Associated Production Higgsstrahlung Vector Bosons b-quarks LHC CERN The ATLAS Experiment ATLAS Upgrade Silicon Technologies Monte Carlo Simulations Tracking. Fake Tracks Combined Performance Statistical Analysis Multivariate Analysis MVA Boosted Decision Trees BDT Simple Template Cross Sections STXS Machine Learning Statistics Statistical Fitting Analysis Optimisation |
| DOI: | 10.5525/gla.thesis.81897 |
| Popis: | On the 4th July 2012, the Standard Model of Particle Physics received further validation with the discovery of the Higgs boson; ushering in a new age of Higgs physics. This thesis presents some of my contributions to the current research in this field as a member of the ATLAS experiment at CERN. It explains how the ATLAS experiment fits within the CERN accelerator complex and the structure of the ATLAS detector, leading to a description of some of the work that I did towards the upgrade of its hardware, and my studies on the reconstruction of tracks in the detector. The thesis goes on to present the results of two analyses I worked on: The VH, H -> bb (read: VHbb) Resolved Analysis and the VH, H -> bb Boosted Analysis. Specific attention will be drawn to my fit studies in the Resolved Analysis, and the new trigger strategy I designed for the Boosted Analysis. The analyses make use of 139fb^-1 of proton-proton collision data at the centre-of-mass energy of 13 TeV, collected by the ATLAS detector between 2015 and 2018, to observe the Higgs boson decay to b-quarks via associated Vector Boson production (VH, H -> bb), and go on to provide differential cross-section measurements in bins of the transverse momentum of the vector bosons. |
| Databáze: | OpenAIRE |
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