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RHIC能区铀核铀核对撞中双轻子产生

摘要第5-7页
ABSTRACT第7-9页
Chapter 1 Introduction第27-47页
    1.1 Standard Model第27-28页
    1.2 Quantum Chromodynamics第28-33页
        1.2.1 Asymptotic Freedom and Confinement第28-29页
        1.2.2 Quark Gluon Plasma and Phase Transition第29-31页
        1.2.3 Chiral Symmetry第31-33页
    1.3 Dilepton Production in Heavy-ion Collisions第33-34页
    1.4 Previous Dilepton Measurements第34-44页
        1.4.1 HADES Experiment第35-36页
        1.4.2 CERES/NA45 Experiment第36-37页
        1.4.3 NA60 Experiment第37-40页
        1.4.4 PHENIX Experiment第40-42页
        1.4.5 STAR Experiment第42-44页
    1.5 Advantage of Dielectron Measurements in U+U Collisions at (?)= 193 GeV第44-47页
Chapter 2 Experimental Setup第47-57页
    2.1 Relativistic Heavy Ion Collider第47-49页
    2.2 STAR Detector第49-57页
        2.2.1 Time Projection Chamber第51-55页
        2.2.2 Time of Flight第55-57页
Chapter 3 Muon Telescope Detector第57-69页
    3.1 MTD Configuration第57-60页
    3.2 MTD Trigger Logic第60-63页
        3.2.1 QT Algorithm第60-62页
        3.2.2 DSM Algorithm(MT101→TF201→TCU)第62-63页
    3.3 MTD Performance and Physics Results第63-69页
Chapter 4 Dielectron Analysis Details第69-97页
    4.1 Event Selection and Centrality Definition第69-70页
    4.2 Electron Identification第70-73页
        4.2.1 Track Selection第70页
        4.2.2 Electron Identification Cuts第70-72页
        4.2.3 Electron Purity第72-73页
    4.3 Pair Reconstruction and Background Subtraction第73-80页
        4.3.1 Like-sign Technique第76-77页
        4.3.2 Mixed-Event Technique第77-78页
        4.3.3 Photon Conversion Removal第78-80页
        4.3.4 Raw Signal第80页
    4.4 Efficiency and Acceptance Corrections第80-87页
        4.4.1 Single Track Efficiency第80-84页
        4.4.2 Pair Efficiency and Acceptance第84-87页
    4.5 Hadronic Cocktail Simulation第87-93页
    4.6 Systematic Uncertainties第93-97页
Chapter 5 Results and Discussion第97-109页
    5.1 Dielectron Invariant Mass Spectra in Minimum-Bias Collisions第97-99页
    5.2 p_T Dependence of The Dielectron Spectra第99页
    5.3 Centrality Dependence of The Dielectron Spectra and Low-Mass Excess Yields第99-101页
    5.4 STAR Acceptance-corrected Dielectron Spectrum and Excess Yields第101-103页
    5.5 Low p_T Dielectron Production in U+U Peripheral Collisions第103-109页
        5.5.1 The p_T Dependence of Dielectron Mass Spectra for Different Centralizes第104-105页
        5.5.2 The p_T Spectra for Different Mass Regions in Different Centralities第105-109页
Chapter 6 R&D of Gaseous Detectors for Particle Identification第109-123页
    6.1 THGEM for TRD第109-115页
        6.1.1 The THGEM Chamber第109-110页
        6.1.2 Cosmic Ray Test System Setup第110-111页
        6.1.3 Performance of The THGEM Chamber第111-114页
        6.1.4 Summary of The THGEM Cosmic Ray Test第114-115页
    6.2 MRPC for Beijing Spectrometer eTOF Upgrade第115-123页
        6.2.1 The MRPC Modules第117页
        6.2.2 Beam Test System Setup第117-118页
        6.2.3 Performance of The MRPC Modules第118-120页
        6.2.4 Summary of The MRPC Beam Test第120-123页
Chapter 7 Summary and Outlook第123-133页
    7.1 Summary第123-124页
    7.2 Outlook第124-133页
        7.2.1 Inner Time Projection Chamber(iTPC)Upgrade第125-127页
        7.2.2 End-cap Time of Flight(eTOF) Upgrade第127-128页
        7.2.3 Dielectron Measurements in BES Ⅱ Program第128-133页
References第133-139页
Appendix A The Trigger Map of The MTD System for Run14 andRun15第139-143页
Appendix B The Trigger Map of The MTD System for Run16第143-147页
ACKNOWLEDGEMENTS第147-149页
Presentations and Publication List第149-150页

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