Matter anti-matter asymmetry

For more info about our services contact : help@bestpfe.com

Table of contents

1 Introduction 
2 The Theoretical Framework 
2.1 The Standard Model of Particle Physics
2.1.1 Fundamental Particles of Matter
2.1.2 Standard Model Lagrangian and Symmetry Group
2.1.3 QCD: SU(3) Lagrangian
2.1.4 Electroweak: SU(2) SU(1) Lagrangian
2.2 Scalar Sector of the Standard Model: Higgs Mechanism
2.2.1 Construction of the Scalar Sector
2.2.2 Scalar Field Potential
2.2.3 Higgs Mechanism
2.2.4 Main Standard Model features involving the Higgs scalar sector .
2.3 SM Higgs Boson Phenomenology at Hadron Colliders
2.3.1 Higgs Production Mechanisms
2.3.2 Higgs Decay Modes
2.3.3 Phenomenology of pp ! V H;H ! bb+leptons processes
2.4 Standard Model Issues and Open Points
2.4.1 Higgs/Hierarchy problem
2.4.2 Gravity problem
2.4.3 Dark matter and dark energy
2.4.4 Matter anti-matter asymmetry
2.4.5 Strong CP problem
2.4.6 Unification of coupling constants
2.4.7 Electromagnetic charge quantization
2.4.8 Hierarchy of fermionic families
2.4.9 Neutrino masses
2.5 Beyond the Standard Model Extensions: Two Higgs Doublet Models
2.5.1 Scalar potential in 2HDM
2.5.2 Flavour Changing Neutral Currents (FCNC) in 2HDM
2.5.3 Relevant phenomenology for Type I and II 2HDM
3 ATLAS and LHC 
3.1 Large Hadron Collider LHC
3.1.1 LHC Experiments
3.2 ATLAS Detector
3.2.1 Detector structure
3.2.2 Magnet System
3.2.3 The Inner Detector
3.2.4 The Calorimeter System
3.2.5 The Muon Spectrometer
3.2.6 The ATLAS Forward Detectors
3.2.7 The ATLAS Trigger and Data Acquisition System
4 Statistical Analysis: The Methodology 
4.1 Physics search as a statistical test
4.2 Treatment of the nuisance parameters in the Likelihood Fit
4.2.1 Smoothing and pruning of systematic uncertainties
4.2.2 Stability of the Likelihood fit: post-fit NPs and rankings
4.2.3 Nuisance parameters correlation
5 Event and Object Reconstruction 
5.1 Physics objects reconstruction
5.1.1 Tracks and vertexes
5.1.2 Leptons
5.1.3 Hadronic Jets
5.1.4 B-Jets
5.1.5 Missing Transverse Energy
5.2 Event reconstruction
5.2.1 Dijet mass resolution: b-jets energy corrections
5.2.2 Kinematic fit
5.2.3 Overlap removal
5.2.4 Truth-tagging
5.3 Objects and event reconstruction in the analysis of p s = 7 TeV data
6 Search for Standard Model V H(bb): Run-1 data 
6.1 Introduction: The Analysis Strategy
6.2 Data and Simulated Samples
6.3 Event selection
6.4 Multivariate Analysis: Boosted Decision Trees
6.4.1 Boosted Decision Trees
6.5 Background Estimate and Modeling
6.5.1 Estimate of the multijet background
6.5.2 Modeling of the EW backgrounds: corrections and reweightings .
6.5.3 Modeling of VH signal: NLO EW differential corrections
6.5.4 Background composition in the V H(bb) analysis
6.6 Systematic Uncertainties
6.6.1 Experimental systematic uncertainties
6.6.2 Uncertainties on the modeling of the multi-jet background
6.6.3 Uncertainties on the MC modeling of signal and backgrounds
6.7 Analysis of the p s = 7 TeV dataset
6.7.1 Main features of the 7 TeV analysis
6.8 Statistical Analysis: the Likelihood fit
6.8.1 The Likelihood function: categories and variables
6.8.2 Nuisance parameters in the Likelihood fit
6.8.3 Combination of p s = 7 TeV and p s = 8 TeV analyses
6.8.4 Measurement of the diboson V Z(bb) signal strength
6.9 Results
6.9.1 Nominal results for the V H(bb) search
6.9.2 Dijet-mass analysis as cross-check of the MVA approach
6.9.3 Diboson V Z(bb) measurement
7 Search for a CP-odd A boson decaying to Zh(bb) with data collected at p s = 13 TeV during the 2015 LHC data-taking 
7.1 Introduction: The Analysis Strategy
7.2 Data and Simulated Samples
7.3 Event selection
7.4 Background Estimate and Modeling
7.5 Systematic Uncertainties
7.5.1 Experimental systematic uncertainties
7.5.2 MC modeling systematic uncertainties
7.6 Statistical Analysis
7.7 Results and Interpretation
8 Search for Standard Model V H(bb): Run-2 data 
8.1 Introduction: The Analysis Strategy
8.2 Data and Simulated Samples
8.3 Event selection
8.4 Multivariate Analysis: Boosted Decision Trees
8.5 Background Estimate and Modeling
8.5.1 Estimate of the multijet background
8.5.2 Modeling of VH signal: NLO EW differential corrections
8.6 Systematic Uncertainties
8.6.1 Experimental systematic uncertainties
8.6.2 Uncertainties on the modeling of the multijet background
8.6.3 Uncertainties on the MC modeling of signal and backgrounds .
8.7 Statistical Analysis: the Likelihood fit
8.8 Results
9 Conclusions and Outlook