文摘
英文文摘
ACKNOWLEDGMENTS
CHAPTER1 Introduction: Quantum Chromodynamics and Heavy Ion Collisions.
1.1 Quantum Chromodynamics
1.1.1 QCD running coupling constant αs
1.1.2 Perturbative QCD (pQCD)
1.1.3 Confinement and chiral symmetry breaking
1.1.4 QCD Phase transition
1.2 Heavy Ion Collisions
1.2.1 Nucleon stopping power and initial energy density
1.2.2 Jet quenching
1.2.3 Collective motion
1.2.4 Transverse azimuthal anisotropy
1.2.5 Heavy flavor production in HIC
1.2.6 What have we learned so far?
CHAPTER2 Experimental Set-up
2.1 RHIC accelerator
2.2 STAR detector
2.3 Main tracker - TPC
2.4 Prototype TOF detector
CHAPTER3 Single electron transverse momentum distributions
3.1 Single electrons from d + Au and p + p collisions at √SNN = 200 GeV
3.1.1 Data sets and Trigger
3.1.2 Electron identification and hadron contamination
3.1.3 Acceptance, Efficiency and Trigger bias
3.1.4 Photonic background contribution
3.1.5 Signal extraction
3.1.6 Background subtraction check
3.1.7 Electron dN/dy and implications for total charm production cross section
3.1.8 Systematic error study
3.2 Single electrons from Au + Au collisions at √SNN = 62.4 GeV
3.2.1 Data set and electron PID
3.2.2 Non-photonic background estimation in Au t Au
3.2.3 Spectra from Au t Au collisions at √SNN = 62.4 GeV
CHAPTER4 Single electron azimuthal anisotropy distributions
4.1 Event plane and its resolution
4.2 Elliptic flow of stable hadrons
4.3 Elliptic flow of inclusive and photonic background electrons
CHAPTER5 Discussion
5.1 Open charm production in high energy collisions
5.1.1 Total charm cross section
5.1.2 Spectrum comparison
5.1.3 Bottom contribution
5.1.4 Cronin effect of charm hadrons in d + Au
5.2 Closed charm production
5.2.1 J/ψ production in p+p collisions
5.2.2 J/ψ production in heavy ion collisions
5.3 Elliptic flow of charm quarks and thermalization
CHAPTER6 Outlook
6.1 Detector upgrade proposals
6.2 Open charm measurements
6.3 Low mass e+e- spectrum
APPENDIX A QCD Lagrangian
A.1 Notations
A.2 SU(3)c invariant QCD Lagrangian
A.3 Chiral symmetry and effective chiral Lagrangian
APPENDIX B Kinematic variables
APPENDIX C Low energy charm cross section data points selection
APPENDIX D Presentations and publication list
References
