Towards a Quark-Gluon Description of the Nucleon

核子的夸克-胶子描述

• 批准号: 1002644
• 负责人: Michael Christy
• 金额: $ 78.9万
• 依托单位: Hampton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-15 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1002644&HistoricalAwards=false
• 关键词: Towards; Quark; Gluon; Description; Nucleon

This award will support the continued efforts of the Hampton University intermediate energy nuclear physics group. This group was formed nearly two decades ago to address a critical need in a science where African-Americans are severely under-represented. Since that time the group has significantly expanded the scientific program, while facilitating the successful careers of a number of minority scientists. The group is recognized for leadership in studies of the structure of the nucleon (proton or neutron), in particular in kinematics where the quarks in the substructure carry a large fraction of the total momentum of the system. Precision measurements of nucleon structure in this regime provide critical information regarding the mysterious transition from a scale where only quarks and gluons matter, to the scale where only nucleons and mesons need to be considered. The group has spearheaded efforts to utilize global data sets for a more comprehensive understanding, and to better model the observed phenomena. The group will continue to focus on electron scattering experiments at the nearby Thomas Jefferson National Accelerator Facility, in particular looking in anticipation to the planned energy upgrade of this laboratory. The group will, as well, broaden to focus on the MINERvA experiment at the Fermi National Accelerator Laboratory. This experiment will use the unique properties of neutrinos, which experience only the weak force, as opposed to the electromagnetic probe provided by an electron beam, and carry a neutral charge, as opposed to the negatively charged electrons. Neutrino scattering is a largely uncharted realm in nucleon structure studies, and promises to provide new insights into the quark-gluon structure of the nucleon. The group is also planning further into the future, investigating the possibilities for nucleon structure studies at the energy frontier of a proposed future new electron-ion collider.

该奖项将支持汉普顿大学中能核物理小组的持续努力。 该小组成立于近二十年前，旨在解决非洲裔美国人严重代表不足的科学的关键需求。 从那时起，该小组大大扩大了科学计划，同时促进了一些少数民族科学家的成功职业生涯。 该小组在核子（质子或中子）结构的研究中被公认为领导者，特别是在子结构中的夸克携带系统总动量的大部分的运动学方面。 精确测量核子结构在这一制度提供了关键信息的神秘过渡，从一个规模，只有夸克和胶子的问题，只有核子和介子需要考虑的规模。 该小组率先努力利用全球数据集，以更全面地了解和更好地模拟观察到的现象。 该小组将继续专注于附近的托马斯杰斐逊国家加速器设施的电子散射实验，特别是期待该实验室计划的能源升级。 该小组还将扩大到关注费米国家加速器实验室的MINERvA实验。 这个实验将使用中微子的独特性质，中微子只经历弱力，而不是由电子束提供的电磁探针，并携带中性电荷，而不是带负电的电子。 中微子散射是核子结构研究中一个很大程度上未知的领域，有望为核子的夸克-胶子结构提供新的见解。 该小组还计划进一步走向未来，调查在拟议的未来新电子离子对撞机的能源前沿进行核子结构研究的可能性。