Rosenthal, Oliver: Evidence and cross section measurement of the process pp->ttbar+photon at a center-of-mass energy of 7 TeV with the ATLAS experimentEvidenz und Wirkungsquerschnittmessung des Prozesses pp->ttbar+photon bei einer Schwerpunktsenergie von 7 TeV mit dem ATLAS-Experiment. 2013
Inhalt
- Contents
- List of Tables
- List of Figures
- 0 Introduction
- 1 Particle Physics
- 1.1 Standard Model of Particle Physics
- 1.2 Quantum Electrodynamics and electroweak unification
- 1.3 CKM matrix
- 1.4 The Brout-Englert-Higgs mechanism
- 1.5 The BEH boson
- 1.6 Yukawa coupling
- 1.7 Quantum Chromodynamics
- 2 The Top Quark
- 2.1 Top quark pair production
- 2.2 Single top quark production
- 2.3 Top quark decay
- 2.4 Background processes for top quark pair events
- 2.5 Top quark properties
- 2.6 Top quark pair events associated with an additional photon
- 3 The Large Hadron Collider and the ATLAS experiment
- 3.1 The Large Hadron Collider
- 3.2 ATLAS Detector Layout
- 3.3 ATLAS Coordinate System
- 3.4 The Magnet System
- 3.5 The Inner Detector
- 3.6 The Calorimeter System
- 3.7 The Muon System
- 3.8 The ATLAS Trigger System
- 4 Physics objects
- 5 Data sample and Monte Carlo modeling
- 5.1 Dataset
- 5.2 Data streams
- 5.3 Event simulation
- 5.4 t¯tγ simulation
- 5.5 Background simulation
- 5.6 Signal phase space overlap
- 5.7 Monte Carlo event weights
- 6 Event selection and event yield
- 7 Analysis strategy to estimate the t¯tγ cross section
- 8 Derivation of signal and background templates
- 9 Estimation of the e → γ misidentification rate
- 9.1 Estimation of the e → γ misidentification rate
- 9.2 Derivation of the e → γ misidentification scale factors
- 10 Background contributions with a prompt photon and misidentified electron in the final state
- 10.1 QCD multijet+γ contribution
- 10.2 W+jets+γ contribution
- 10.3 Top quark pair background
- 10.4 Other contributions
- 11 Measurement of the t¯tγ cross section
- 12 Systematic uncertainties
- 12.1 Template Modeling
- 12.2 Prompt photon background
- 12.3 Monte Carlo modeling
- 12.4 Detector Modeling
- 12.5 Pileup dependence
- 12.6 Luminosity
- 12.7 Total systematic uncertainty
- 13 Signal significance
- 14 Summary and Outlook
- Appendix A Monte Carlo samples
- A.1 t¯t Monte Carlo samples
- A.2 W+jets+γ Monte Carlo samples
- A.3 W+jets Monte Carlo samples
- A.4 Z+jets Monte Carlo samples
- A.5 Diboson Monte Carlo samples
- A.6 Single top Monte Carlo samples
- A.7 Dijet Monte Carlo samples
- Appendix B Additional plots
- B.1 Additional plots of Chapter 6
- B.2 Additional plots of Chapter 8
- B.3 Additional plots of Chapter 9
- B.4 Additional plots of Chapter 10
- B.5 Additional plots of Chapter 12
- Bibliography