声明
摘要
Abstract
TABLE OF CONTENTS
CHAPTER 1 Introduction
1.1 Introduction to Quantum Chromodynamics
1.1.1 Deconfinement and phase diagrmm
1.2 Heavy Ion Collisions and Quark-Gluon Plasma(QGP)
1.2.1 Jet quenching
1.2.2 Collective motion
1.3 Heavy flavor production at RHIC energies
1.3.1 Previous non-photonic electron measurements at RHIC
1.4 Thesis outline
CHAPTER 2 Exoeriment Set-Up
2.1 Relativistic Heavy Ion Collider(RHIC)
2.2 STAR experiment
2.3 STAR detectors
2.3.1 Heavy Flavor Tracker(HFT)
2.3.2 Time Projection Chamber(TPC)
2.3.3 Time Of Flight detector(TOF)
2.3.4 Electro-Magnetic Calorimeter(BEMC)
CHAPTER 3 Non-photonic electron production in p+p collisions at √s=200 GeV
3.1 The procedure for this analysis
3.2 Dataset and event selection
3.3 Inclusive and photonic electrons selection from data
3.3.1 Track quality cuts
3.3.2 Electron identification cuts
3.4 Efficiency correction to the raw spectra
3.4.1 TPC Tracking efficiency
3.4.2 Electron identification efficiency
3.4.3 BEMC trigger efficiency correction
3.4.4 Photonic electron reconstruction
3.4.5 hadron fraction estimation from electron purity fit
3.5 Result and discussion
3.5.1 Non-photonic electron cross section in p+p collisions at √s=200 GeV
3.5.2 Non-photonic electron nuclear modification factor
4 Measurements of open bottom and charm hadron production in Au+Au collisions at √sNN=200 GeV
4.1 The motivation and procedures for this analysis
4.1.1 Dataset and event selection
4.2 Inclusive electrons selection from data
4.2.1 Track quality cuts
4.2.2 Electron identification cuts
4.3 The charm and bottom hadron decayed electrons template from data driven simulation
4.3.1 EvtGen simulation
4.3.2 Electrons and hadrons DCAxy comparison from full detector Geant simulation
4.3.3 Data driven fast simulation
4.4 Background DCA template
4.4.1 Photonic electrons background
4.4.2 Hijing simulation
4.4.3 Hadron background DCAXY from data
4.4.4 hadron fraction estimation from electron purity fit
4.5 Fraction fit to the data inclusive electrons based on the template
4.5.1 Basic concepts of Minut
4.5.2 Systematic uncertainty
4.5.3 The fraction of B-decayed electrons
4.5.4 Nuclear modification factors RAA for D-and B-decayed electrons
CHAPTER 5 Summary and Outlook
5.1 Summary
5.2 Outlook
5.2.1 Detector upgrade proposals
5.2.2 Future measurements
References
PRESENTATIONS AND PUBLICATION LIST
Acknowledge