Search for partners of the top quark with the ATLAS experiment / Jan Küchler. Wuppertal, [2018]
Inhalt
- Introduction
- I Theory of particle physics
- The Standard Model
- Particles in the Standard Model
- Mathematical formulation
- Electroweak interactions
- Strong interactions
- Validation of the Standard Model
- Open questions in the Standard Model
- Vector-like quarks
- Supersymmetry
- Event simulation
- II The ATLAS experiment at the Large Hadron Collider
- III Searches for top quark partners
- Common aspects of the searches for top quark partners
- Analysis strategy
- Data sample
- Signal and background modelling
- Basic event selection
- Properties of signal and background
- Systematic uncertainties
- Comparison of data and simulation
- Statistical evaluation
- Search for vector-like top quarks in the TZt channel
- Signal modelling and properties
- Signal region
- Background estimation
- Background validation
- Impact of systematic uncertainties
- Results
- Comparison to similar searches
- Search for supersymmetric partners of the top quark
- Signal properties
- Signal region
- Background estimation
- Background validation
- Impact of systematic uncertainties
- Results
- Comparison to similar searches
- Combination with a soft-lepton selection
- Comparison and outlook
- Conclusion
- Appendix
- b-tagging in dense environments
- Vector-like top quarks
- Mass and decay mode dependency of the signal properties
- Additional control region distributions
- Additional validation region distributions
- Search for top squarks
- Additional control region distributions
- Additional validation region distributions
- Combination of tN_high and bCsoft_high
- Bibliography
- Acknowledgements