Measurements of the nucleon electromagnetic form factors at high momentum transfer in experimental hall A at Jefferson Lab

本项目的重点是弹性电子-核子散射的一系列测量，以确定核子的电磁形状因子。自20世纪50年代霍夫施塔特（Hofstadter）的开创性研究以来，通过先前对核子形状因子的测量，人们对强子的结构和强相互作用有了很多了解。美国的杰斐逊实验室是CEBAF电子加速器的所在地，它可以向四个实验大厅提供能量高达12 GeV的连续波，高电流极化电子束。实验大厅A的SBS项目的目标是提取四种动量传递的最高测量值下的核子形式因子，以便更好地理解导致这些亚核子尺度上形式因子演变的夸克-胶子动力学。博士生将参与这个正在进行的实验项目的各个方面，从测试和安装新的硬件和探测器系统，通过在杰斐逊实验室的数据采集中发挥积极作用，到运行粒子传输蒙特卡罗模拟和分析实验数据。预计学生的论文将集中在2024个实验中的一个特定的运动学设置上。

The focus of this project is a series of measurements of elastic electron-nucleon scattering to determine the nucleon's electromagnetic form factors. Much has been learned on the structure of hadrons and the strong interaction through previous measurements of the nucleon's form factors since the pioneering research of Hofstadter in the 1950s. Jefferson Lab in the USA is home to the CEBAF electron accelerator, which delivers continuous-wave, high current polarised electron beams with energies up to 12 GeV to four experimental halls. The goal of the SBS programme in experimental Hall A is extracting the nucleon form factors at the highest ever measured values of four momentum transfer in order to gain a better understanding of the quark-gluon dynamics that give rise to evolution of the form factors at these sub-nucleonic scales. The PhD student will be involved in all aspects of this ongoing experimental programme, from testing and installation of new hardware and detector systems, through paying an active role in the data-taking at Jefferson Lab, to running particle transport Monte Carlo simulations and analysing the experimental data. It is anticipated that the student's thesis will focus on one particular kinematic setting from one of the 2024 experiments.