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Hüske, Nils Kristian: The Higgs boson in the Standard Model : theoretical constraints and a direct search in the WH channel at the Tevatron. 2010
Inhalt
0 Foreword
Acknowledgments
Contents
List of Figures
Theory
1 The Standard Model of Particle Physics
1.1 Introduction
1.2 Elementary Particles
1.3 Fundamental Forces
1.3.1 Electromagnetic Force
1.3.2 Weak Force
1.3.3 Strong Force
1.3.4 Gravity
1.4 Electroweak theory and spontaneous symmetry breaking
1.4.1 The Higgs mechanism
1.5 Quantum Chromodynamics
1.6 The Standard Model
2 The Higgs boson
2.1 Constraints on the Higgs Boson Mass
2.1.1 Direct Searches at LEP
2.1.2 Indirect constraints from EW Precision Measurements
2.1.3 Combining Direct and Indirect Constraints
2.2 Higgs Searches at the Tevatron
3 Implications of the Higgs Boson Mass for the SM and Cosmology
3.1 Renormalization
3.2 Evolution of the quark Yukawa couplings
3.2.1 Excerpt: Runge-Kutta method
3.3 Validity of the Standard Model
3.3.1 Calculating the Higgs mass bounds
3.3.2 Implications for cosmology and new physics beyond the SM
3.3.3 Cosmological inflation
Experiment
4 THE WH ANALYSIS
5 Experimental Apparatus
5.1 Fermilab
5.2 Accelerator Chain
5.3 The DØ Detector
5.3.1 Tracking System
5.3.2 Magnets
5.3.3 Preshower System
5.3.4 Calorimeter
5.3.5 Luminosity Monitor
5.3.6 Muon System
5.3.7 Triggers
5.3.8 Data Quality and Acquisition
5.4 Object Reconstruction
5.4.1 Tracks
5.4.2 Vertices
5.4.3 Electron reconstruction and identification
5.4.4 Muon reconstruction and identification
5.4.5 Jets
5.4.6 Missing Transverse Energy
5.5 Corrections
5.5.1 Lepton Identification
5.5.2 Lepton Resolution
5.5.3 Jet Energy Scale Correction
5.5.4 Vertex Confirmation
5.6 Tagging of b quark jets
5.6.1 Taggability
5.6.2 b Tagging
6 MODELING OF PHYSICS PROCESSES
6.1 Generators
6.1.1 PYTHIA
6.1.2 ALPGEN
6.1.3 CompHEP
6.2 Detector Simulation
6.3 Simulated Processes
6.3.1 Cross Section Correction
6.3.2 Simulated Event Tables
6.3.3 Experimental k factors and heavy flavor scale factors for W+jets and Z+jets samples
6.4 Event Correction
6.4.1 Trigger Correction
6.4.2 Luminosity Profile
6.4.3 z Position of the Primary Vertex
6.5 ALPGEN Reweighting
6.5.1 Z Boson Transverse Momentum
6.5.2 Jet det in the ICD region
6.5.3 Jet
6.5.4 Lepton
6.5.5 W pT and R
6.6 Multijet Background Estimation
6.6.1 Multijet background modeling
6.7 Jet Corrections in Simulated Events
6.8 Tagging Correction Factors
6.8.1 Taggability Correction Factors
6.8.2 b Tagging Correction Factors
7 ANALYSIS
7.1 W Boson Reconstruction
7.1.1 Lepton Reconstruction
7.1.2 ETReconstruction
7.1.3 W Boson Reconstruction
7.2 Higgs Boson Reconstruction
7.2.1 Pretag Level
7.2.2 b Tagging in the WH Analysis
7.3 Background Reduction
7.3.1 Improvement using a Random Forest
7.4 Signal Extraction
7.4.1 Procedure
7.4.2 Systematic Uncertainties in the WH Analysis
7.4.3 Final Result on WH Production
Conclusion and Outlook
8 CONCLUSION and OUTLOOK
Bibliography
Appendix
A Figures for the Three Jet Final State
A.1 Lepton Reconstruction
A.2 Missing Transverse Energy Reconstruction
A.3 W Boson Reconstruction
A.4 Higgs Boson Reconstruction
A.4.1 Pretag Level
A.4.2 Single Tag
A.4.3 Double Tag
A.5 Combined Figures for Three Jet Events
B Systematic Uncertainty Size Estimation
Abstract
Résumé