声明
摘要
Abstract
TABLE OF CONTENTS
CHAPTER 1 Introduction
1．1 Quantum Chromodynamics
1．1．1 Asymptotic Freedom and Confinement
1．1．2 Quark-gluon Plasma
1．1．3 QCD Phase Diagram
1．2 Heavy Ion Collisions
1．2．1 Time Evolution
1．2．2 Transverse Azimuthal Anisotropy
1．3 QCD Vacuum Transition and Local Parity Violation
1．4 Online Event Selection with High Performance Computing
CHAPTER 2 The STAR Experiment
2．1 The Relativistic Heavy Ion Collider
2．2 The STAR Detectors
2．2．1 Time Projection Chamber
2．2．2 Fast Detectors
2．2．3 STAR Trigger System
CHAPTER 3 The STAR High Level Trigger
3．1 Overview
3．1．1 TPC Track Reconstruction
3．1．2 Calibration
3．1．3 Online monitoring
3．1．4 Event Selection and Physics Results
3．2 Upgrade plan for the STAR HLT
3．2．1 Hardware upgrade
3．2．2 Software upgrade：Cellular Automaton Tracking，Kalman Filter track fitting and Kalman Filter particle reconstruction
3．2．3 Integration
3．3 High Performance Computing
3．3．1 Vectorization
3．3．2 Multithreading
3．3．3 Heterogeneous Computing
3．3．4 A Prototype of GPU Accelerated Secondary Vertex Finder
CHAPTER 4 Charge Asymmetry Dependency of Pion Event Anisotropy in Au+Au Collisions
4．1 Introduction
4．1．1 Chiral Magnetic Effect and Chiral Separation Effect
4．1．2 Chiral Magnetic Wave
4．1．3 Measure Local Parity Violation at STAR
4．2 Event Selection and Particle Identification
4．3 Event-by-event Charge Asymmetry
4．4 v2 Measurement
4．4．1 Event Plane Method
4．4．2 Q-Cumulant Method
4．5 Results
4．5．1 Charge Asymmetry dependency of v2(π-)and v2(π+)
4．5．2 Centrality and Energy Dependency of Slope Parameter
4．6 Systematic Uncertainties
CHAPTER 5 Discussion
5．1 Multi-Component Coalescence Model
5．2 AMPT Model with Hardonic and Partonic Potential
5．3 Test Chiral Magnetic Effects in U+U Collisions
CHAPTER 6 Summary and Outlook
6．1 Summary
6．2 Future Development of the STAR High-Level Trigger
6．3 Outlook for the Charge Asymmetry Dependency of Pion Event Azimuthal Anisotropy
References
PRESENTATIONS AND PUBLICATION LIST
ACKNOWLEDGMENTS
