Electromagnetic Structure of the Neutron

9722533麦迪中子和质子是物质的两个基本组成部分。了解中子的电荷结构对于理解物质的结构是必不可少的。这方面的知识是需要详细的电磁核结构的微观计算，用于测试粒子结构的组分夸克模型，并从宇称破坏电子散射实验中提取质子的奇异夸克含量。目前对中子电荷结构的了解不足以满足这些需要。杰斐逊实验室（JLab）实验93-038解决了这个关于中子电荷结构性质的基本问题：中子中组成夸克的空间分布是什么？在这个实验中，纵向极化的电子从氘中的中子准弹性散射。 JLab E93-038将使用专门设计用于测量中子侧向极化分量散射不对称性的中子偏振计探测器。 氘的准弹性散射的另一个优点是对结果的解释对涉及氘结构的理论模型不敏感。JLab E93-038具有比其他技术更小的统计和系统不确定性的科学潜力。

9722533MadeyThe neutron and the proton are the two basic building blocks of matter.Knowledge of the charge structure of the neutron is essential to understanding the structure of matter. This knowledge is needed for detailed microscopic calculations of electromagnetic nuclear structure, for testing evolving constituent quark models of particle structure, and for extraction of the strange quark content of the proton from parity-violating electron scattering experiments. Current knowledge of the neutron charge structure is insufficient to meet these needs. Jefferson Laboratory (JLab) Experiment 93-038 addresses this fundamental question regarding the nature of the charge structure of the neutron: What is the spatial distribution of the constituent quarks within the neutron? In this experiment, longitudinally polarized electrons scatter quasielastically from a neutron in deuterium. JLab E93-038 will utilize a neutron polarimeter detector designed specifically for the measurement of the scattering asymmetry from the sideways polarization component of the neutron. Another advantage of quasielastic scattering from deuterium is that the interpretation of the results is insensitive to theoretical models involving the structure of the deuteron. JLab E93-038 has the scientific potential for achieving smaller statistical and systematic uncertainties than other techniques at this time.