Measurement of the inclusive and fiducial tt̄ production cross-sections in the lepton+jets channel in pp collisions at s = 8 TeV with the ATLAS detect [...] / vorgelegt von Arwa Bannoura. Wuppertal, 20. Juli 2018
Content
Contents
Introduction
Theory
Experimental setup
Event generation and simulated samples
Objects reconstruction, identification and selection
Event selection, event reconstruction and backgrounds estimation
Overlap removal and event selection
tbart reconstruction
Signal and validation regions
Particle-level object reconstruction and selection
Backgrounds estimation
Events yield
Data-driven W+jets method
Discriminating observables
Sources of systematic uncertainties
Physics objects modelling
Signal modelling
Background modelling and normalisation
Background normalisation for non-fitted backgrounds
W+jets modelling
Multijet background modelling and normalisation
Luminosity
Statistical analysis
Maximum likelihood method
Evaluation of uncertainties using pseudo-experiments
Systematic uncertainties paramterised in the likelihood fit
Extraction of the tbart cross-section
Uncertainties in the inclusive and fiducial measurement
Results
Conclusion and outlook
Simulated samples
Shape uncertainties
Acceptance uncertainties
List of Figures
List of Tables
Bibliography