Nuclear Force and Nucleon Structure Studies at Intermediate Energies

这项为期三年的资助将支持三名教师，两名博士后研究员和三名研究生的研究，以进行各种中能核物理实验。 该小组的大部分活动都集中在中子极化的测量上。 这些实验包括在印第安纳州大学回旋加速器设施的中子极化设施中，对极化质子与各种靶反应中的全套自旋可观测量的研究。 这些实验使用由肯特州立大学开发的专用探测器来同时测量中子的正常极化和侧向极化。 用2 H、3 He和4 He靶进行的测量将研究由单个π介子或ρ介子介导的核子-核子相互作用部分。 其他实验将研究核连续谱的等矢量响应和等矢量巨偶极共振。 在麻省理工学院贝茨实验室和托马斯杰斐逊国家加速器设施（TJNAF）使用极化电子束通过中子极化测量来确定中子的电形状因子。 其他实验包括对三体力的研究和对π介子场效应的研究。 这笔赠款还将支持布鲁克海文国家实验室AGS的水晶球和TJNAF大厅B的CLAS探测器的实验，以分别研究中性重子共振和核子共振。

This three-year grant will support the research of three faculty members, two post-doctoral fellows, and three graduate students to perform a variety of experiments in medium-energy nuclear physics. Much of the activity of the group is focused around measurements of the neutron polarization. These experiments include studies of the complete set of spin observables in the reaction of polarized protons with a variety of targets at the neutron polarization facility at the Indiana University Cyclotron Facility. These experiments use specialized detectors developed by Kent State to measure normal and sideways polarizations of the neutron simultaneously. Measurements with 2H 3He, and 4He targets would study the nucleon-nucleon interaction part that is mediated by a single pion or rho meson. Other experiments would study the isovector response of the nuclear continuum and the isovector giant dipole resonance. The determination of the electric form factor of the neutron would be obtained from neutron polarization measurements using polarized electron beams at the MIT-Bates Laboratory and the Thomas Jefferson National Accelerator Facility (TJNAF). Other experiments include a search for three-body forces and a search for pion-field effects. This grant would also support experiments with the Crystal Ball at the Brookhaven National Laboratory AGS and the CLAS detector at Hall B at TJNAF in order to study neutral baryon resonances and nucleon resonances, respectively.