Measurement of the fiducial and total single top-quark t-channel production cross-sections with the ATLAS detector at s = 8 TeV / vorgelegt von M. Sc. Phillipp Tepel. Wuppertal, 12. März 2018
Inhalt
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- The Top-Quark within the Standard Model of Particle Physics
- The ATLAS Experiment at the Large Hadron Collider
- ATLAS Data and Monte Carlo Simulation
- Object Definition
- Object Definition at Reconstruction Level
- Track and Vertex Reconstruction
- Electron Candidates
- Muon Candidates
- Jet Candidates
- Missing Transverse Momentum
- b-Quark Jet Identification
- Object Definition at Particle Level
- Event Selection and Background Estimation
- Event Selection
- Removal of the m(b)-tail
- The Multijet Veto
- The Dilepton Veto
- Definition of Signal and Control Regions
- Background Estimation
- Composition of the Processes
- Event yields and Control Distributions
- Fiducial Volume and Cross-Section Predictions
- Construction of Neural Network Discriminant
- Reconstruction of the W boson and top quark
- Discriminating Variables
- Variable Preprocessing
- Neural Network Training
- Consolidation of Input Variable Set
- Final NN Discriminant Characteristics
- Measurement of t-channel single top-quark cross-sections
- Statistical Methods
- Binned Maximum-Likelihood Fit
- Uncertainty Estimation in the Frequentist Approach
- Post-fit Distributions
- Post-fit Distributions in a Highly Enriched Signal Region
- Estimation of Systematic Uncertainties
- Evaluation of Systematic Uncertainties
- Measurement Results
- Conclusions
- Bibliography
- Appendices
- Acceptance Uncertainties Considered in the Statistical Analysis