动量转移区间（0.55GeV/c≤|q|≤1.0GeV/c）电子准弹性散射的纵向和横向响应函数R_L和R_T的精确测量

论文摘要

JLab A大厅的库仑求和实验在较宽的转移三动量区间0.55GeV/c<|q|<1.0GeV/c,精确测量了单举散射过程中电子在准弹性散射区域内的散射截面,所用的靶有4He; 12C,56Fe和208Pb。本文主要基于对JLab A大厅右臂12C靶的分析,分别提取出核子的纵向和横向响应函数RL和RT,填补了这个区间的数据空白。同时计算出12C靶的库仑求和值并与世界上已有的数据进行了比较。目前的结果非常初步,仍有待进一步降低误差得到更可靠的结果。当我们完成对所有右臂和左臂的数据分析后,期待能证明短程下核介质中纵向响应函数RL的“淬灭”问题,以及研究库仑求和规则(CSR)基于转移三动量|q|的演变。

论文目录

• 摘要
• ABSTRACT
• Table of Cotnetns
• Acknowledgements
• 1 Introduction
• 1.1 Overview
• 1.1.1 Inclusive Electron Scattering
• 1.1.2 Quasi-elastic Eleetron Seattering
• 1.2 Rosenbluth Formula and Coulomb Sum Rule
• 1.2.1 Kinematics and Rosenbluth Formula
• 1.2.2 Coulomb Sum Rule
• L,R_T and Theoretical Models'>1.3 Existing Data of R_L,R_T and Theoretical Models
• 1.3.1 Previous Measurements
• 1.3.2 Theoretical Models
• 2 The Experiment Setup
• 2.1 The Accelerator and the Electron Source
• 2.2 Experiment Kinematic settings
• 2.3 Hall-A Overview
• 2.4 Beamline
• 2.5 Beam Energy Measurement
• 2.5.1 Arc Measurement
• 2.5.2 eP Measurement
• 2.6 BCM System
• 2.7 Raster and Beam Position Monitor
• 2.8 Target Configuration
• 2.8.1 The scattering chamber
• 2.8.2 Cryogenic targets
• 3 The Hall A Spectrometers
• 3.1 Hall A Spectrometers
• 3.1.1 High Resolution Momentum Spectrometers
• 3.1.2 Detector Package
• 3.1.3 Vertical Drift Chambers
• 3.1.4 Scintillators and Trigger Electronics
• 3.1.5 Gas Cerenkov Detector
• 3.1.6 Lead Glass Counters
• 3.1.7 NaI Detector
• 3.2 Data Acquisition System
• 4 Data analysis
• 4.1 Analysis Procedure
• 4.2 Data Analysis
• 4.2.1 BCM Calibration
• 4.2.2 NaI（Tl） Detector Calibration and Background analysis
• 4.2.3 Cerenkov Calibration and Efficiency
• 4.2.4 Preshower and Shower Calibration and Efficiency
• 4.2.5 HRS Optics
• 4.2.6 Acceptance Cut
• 4.3 Cross Sections
• 4.3.1 Cross Sections
• 4.3.2 Systematic Errors
• 4.4 RL and RT separation
• 4.5 Coulomb Sum Rule
• 5 Results and Conclusion
• Appendices
• A Rosenbluth Formula
• B Radiative Corrections
• B.1 Overview
• B.2 Radiative Correction for Quasielastic Data
• B.2.1 Formulae
• B.2.2 Procedure
• B.3 Radiative Correction for Elastic Data
• C Carbon Cross Sections with Only Systematic Error
• C.1 Carbon Cross Sections with Only Systematic Error at 15 degree
• C.2 Carbon Cross Sections with Only Systematic Error at 60 degree
• C.3 Carbon Cross Sections with Only Systematic Error at 90 degree
• C.4 Carbon Cross Sections with Only Systematic Error at 120 degree
• D Research Achievements
• E List of Tables and List of Figures
• List of Tables
• List of Figures
• Bibliography