Measurements of Hadronic tt Differential Cross Sections with ATLAS and Unfolding with Gaussian Processes. / Bozson, Adam.

2020. 356 p.

Research output: ThesisDoctoral Thesis

Unpublished

Documents

Abstract

Measurements of tt production cross sections at the Large Hadron Collider are presented. Proton–proton collision data with a centre-of-momentum energy of 13 TeV were collected using the ATLAS detector, totalling an integrated luminosity of 36.1 fb-1. The measurements are performed for the fully hadronic decay channel where the jets can be resolved. This allows all tt decay components to be measured along with additional QCD radiation.

The results are presented as absolute and normalised unfolded differential cross sections at particle level, as functions of several kinematic variables. Some cross sections are also unfolded to parton level, and some two-dimensional differential cross sections are presented. These distributions are compared to several Monte Carlo simulations.
Potential uses for Gaussian processes in particle physics are discussed, and a novel method for unfolding with Gaussian processes is introduced. The method is derived and assessed in terms of the unfolded estimators, statistical covariance matrices, and flexibility of the model.
Original languageEnglish
QualificationPh.D.
Awarding Institution
Supervisors/Advisors
Thesis sponsors
  • Science and Technology Facilities Council
Award date1 May 2020
Publication statusUnpublished - 2020

Research outputs

This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 37866033