Measurement of the charged-current Drell-Yan single- and double-differential cross-sections at high transverse masses at √s=13TeV with the ATLAS detec [...] / Frederic Schröder. Wuppertal, 2022
Inhalt
- Introduction
- The W boson in the Standard Model
- Matter particles
- Gauge bosons and fundamental forces
- Peculiarities of the weak interaction
- Electroweak unification
- Higgs mechanism
- Predictions of the Standard Model
- The ATLAS experiment at the Large Hadron Collider
- Strategy for the measurement of the cross-section
- At a glance: Mathematical formulation of unfolding
- Data and Monte Carlo samples
- Analysed datasets
- Event generation at the Large Hadron Collider
- Simulated signal and background samples
- Validation of alternative Monte Carlo samples
- Event reconstruction with the ATLAS detector
- Trigger
- Electron selection
- Muon selection
- Small-R jet selection
- Missing transverse momentum MET
- Overlap removal
- Signal extraction
- Selection criteria at reconstructed level
- Selection criteria at truth level
- Definition of variables for the cross-section measurement
- Background estimation
- Matrix Method
- Dependence on the choice of objects in the MET calculation
- Different energy calibrations of objects and implications on MET
- Estimation of object- and phase-space dependent MET
- Measurement of the real efficiencies
- Measurement of the fake efficiencies
- Systematic uncertainties on the multijet background
- Background estimate of the multijet in two different regions
- Comparison of data and prediction
- Systematic uncertainties
- Unfolding
- Iterative Bayesian Unfolding
- Technical closure test
- Stress test
- Calculation of the covariance matrix
- Regularisation
- Residuals and statistical uncertainty w.r.t. the previous iteration
- chi2 tests
- Average global correlation coefficient test
- Conclusions on the number of iterations
- Unfolding of experimental and theoretical systematic uncertainties
- Systematic uncertainty of the unfolding procedure
- Results
- Unfolded single-differential cross-section in mTW
- Unfolded double-differential cross-section in mTW times eta
- Conclusion and Outlook
- MC samples and theoretical cross-sections
- Issues with large weights from the W MC sample
- Background estimation supplemental material
- Comparison of data with MC samples supplemental material
- Systematic uncertainties supplemental material
- Unfolding supplemental material
- Tabular presentation of the measured cross sections
- References