声明
摘要
Abstract
Acknowledgements
Contents
Chapter 1 Introduction
Chapter 2 Theoretical Framework
2．1 The Standard Model
2．2 The Higgs Mechanism
2．3 Physics at Hadron Colliders
2．4 Standard Model Higgs Boson Phenomenology at Hadron Colliders
2．4．1 Higgs Boson Production Mechanisms
2．4．2 Higgs Boson Decay Modes
Chapter 3 The Large Hadron Collider and the ATLAS detector
3．1 The Large Hadron Collider
3．2 The ATLAS Detector
3．2．1 Overview
3．2．2 Inner detector
3．2．3 Calorimetry
3．2．4 Muon spectrometer
3．2．5 Forward detectors
3．2．6 Trigger and data acquisition system
3．3 Luminosity
3．4 Pile-up
3．5 Monte Carlo Simulation
Chapter 4 Object Reconstruction
4．1 Tracks and Vertices
4．2 Electrons
4．2．1 Reconstruction
4．2．2 Identification
4．2．3 Isolation
4．2．4 Simulation Correction Factors from Efficiency Measurement
4．3 Muons
4．3．1 Reconstruction
4．3．2 Identification
4．3．3 Isolation
4．3．4 Simulation Correction Factors from Efficiency Measurement
4．5．1 Reconstruction
4．5．2 Calibration
4．5．3 Jet Cleaning and Pile-up Jets Suppression
4．6 B-jet Tagging
4．7 Missing Transverse Energy
Chapter 5 Search for the Standard Model VH(b(b))
5．1 Overview
5．2 Dataset and Simulated Event Samples
5．3 Object and Event Selection
5．3．1 Overlap removal procedure
5．3．2 Analysis specific object definition
5．3．3 Event selections
5．3．4 Additional selections for dijet mass analysis
5．3．5 Truth b-jets tagging
5．3．6 Jet energy corrections
5．3．7 Analysis regions
5．4 Multivariate Analysis
5．4．1 Input variables
5．4．2 Setup and training
5．4．3 BDT transformation
5．5 Estimation of The Multi-jet Background
5．5．1 0-lepton channel
5．5．2 1-lepton channel
5．5．3 2-lepton channel
5．6．1 W→ThadV channel study
5．6．2 Thad removal
5．6．3 t(t) reduction cut study
5．6．4 Pile-up jet suppression
5．6．5 Dijet-mass analysis selection and categorization optimization
5．7 Systematic Uncertainties
5．7．1 Experimental systematic uncertainties
5．7．2 Simulated background uncertainties
5．7．3 Signal uncertainties
5．8 Statistical Analysis
5．8．1 Likelihood function
5．8．2 Test statistics
5．8．3 Uncertainty on signal strength
5．8．4 Asimov dataset
5．8．5 Treatment of the nuisance parameters in the likelihood fit
5．9 Results
5．9．1 Results of the SM Higgs boson search at (s)=13 TeV
5．9．2 Results of the diboson analysis
5．9．3 Results of the dijet-mass analysis
5．9．4 Results of combination
5．10 Two Further Improvements in 1-lepton Channel
5．10．1 Adding 1-lepton medium PVT region in the fit
5．10．2 Using extended t(t) MC samples
Chapter 6 Conclusion and Outlook
References
