Scattering and Reactions of Intermediate Energy Projectiles

本提案将支持罗格斯大学中能实验核物理组实验研究计划的继续进行。这三位教员与世界各地的许多物理学家合作，在弗吉尼亚州纽波特纽斯的杰斐逊实验室进行实验，该实验室是CEBAF的所在地，CEBAF是一个能量高达6 GeV的连续束流电子加速器。为了与实验室的使命保持一致，该组的实验旨在揭示原子核和核子的夸克结构。即将到来的拨款期的主要工作将集中在杰斐逊实验室的以下测量：深度虚拟康普顿散射，中子自旋结构和核子弹性形状因子。前两次测量旨在探索核子的子结构——测量构成核子的夸克的位置和动量分布。最后的弹性测量研究了核子作为一个整体的性质。这些测量和其他测量的结合将帮助我们理解复杂的区域，在这个区域中，由夸克和胶子组成的核子的描述转变为介子云包围的核子图像。在拨款期间，该小组的活动也将扩大到伊利诺斯州巴达维亚费米实验室的中微子相互作用研究。这些目标与杰斐逊实验室所追求的目标相似。然而，与电子和光子相比，中微子对核子的子结构有不同的灵敏度。对中微子相互作用的研究使我们对核子结构有了更全面的了解。除了提高我们对自然的基本认识外，这个项目还将有助于培养学生的基础研究技术。该小组培养的过去的学生已经在不同的领域为社会做出了贡献，包括医学物理学，核废料管理和最先进的真空仪器的发展。

This proposal will support the continuation of the experimental researchprogram of the intermediate energy experimental nuclear physics group atRutgers University. The three faculty members collaborate with a largenumber of physicists throughout the world on experiments at JeffersonLaboratory in Newport News, Virginia, home to CEBAF, a continuous beamelectron accelerator with energies available up to 6 GeV. In keepingwith the mission of the Laboratory, the experiments of the group aredesigned to unfold the quark structure of nuclei and nucleons. The majorwork for the coming grant period will be concentrated on the followingmeasurements at Jefferson Laboratory: deep virtual Compton scattering,neutron spin structure, and the nucleon elastic form factors. The firsttwo measurements are intended to explore the substructure of the nucleonmeasuring the position and momentum distributions of the quarks makingup the nucleon. The last elastic measurements study the properties ofthe nucleon as a whole. The combination of these measurements andothers will help us understand the complex region where the descriptionof a nucleon as composed of quarks and gluons transforms into a pictureof nucleons surrounded by clouds of mesons. This grant period will alsosee an expansion of the group's activities to the study of neutrinointeractions at Fermilab, in Batavia, Illinois. The goals are similarto those being pursued at Jefferson Lab. However, neutrinos have adifferent sensitivity to the substructure of the nucleon than doelectrons and photons. The study of neutrino interactions allows us todevelop a more complete understanding of the nucleon structure.Beyond improving our basic understanding of nature, this project willhelp train students in the techniques of basic research. Past studentstrained by this group have gone on to contribute to society in diversefields including medical physics, management of nuclear waste and,development of state of the art vacuum instrumentation.