Investigations in Lattice Field Theory

格场论研究

• 批准号: 0704171
• 负责人: James Hetrick
• 金额: --
• 依托单位: University of the Pacific
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0704171&HistoricalAwards=false
• 关键词: Investigations; Lattice; Field; Theory

The research effort will have three main themes connected with Lattice Gauge Theory (LGT). The phenomenology of excited and exotic hadrons is work directly relevant to experimental efforts at medium/high energy at Fermilab, Jefferson Lab, Cornell, and Stanford. For example, the Glue-X experiment proposed at Jefferson Lab is aimed at looking for "exotic" hadrons in the near future. The differences between excited and exotic particles requires theoretical understanding which only LGT can provide. In 2007, CERN's Large Hadron Collider will come online and presumably give us information about the most elusive aspect of the Standard Model (SM), the Higgs sector. Unraveling the implications of these experiments for physics beyond the SM requires a non-perturbative understanding of the theory. The PIs intend to explore this by developing a detailed understanding of a Higgs-Top-Gluon model using LGT. This model captures the essential couplings of the SM as the regularization cutoff is pushed to high energy and will help us see where the SM breaks down, heralding new physics. The third major inquiry by our group is into the nature of quark confinement. There is much LGT evidence showing confinement to be related to topological excitations of the gauge field, such as instantons, vortices, and monopoles. This proposal represents the inauguration of a new lattice gauge theory (LGT) group at the University of the Pacific. This will bring research possibilities to undergraduates in an accessible field that stresses computational physics.

研究工作将有三个主要主题与格点规范理论（LGT）。受激强子和奇异强子的现象学是与费米实验室、杰斐逊实验室、康奈尔大学和斯坦福大学的中/高能实验直接相关的工作。例如，杰斐逊实验室提出的GIG-X实验旨在寻找不久的将来的“奇异”强子。激发态粒子和奇异粒子之间的差异需要理论上的理解，只有LGT可以提供。2007年，欧洲核子研究中心的大型强子对撞机将上线，并可能为我们提供有关标准模型（SM）最难以捉摸的方面的信息，希格斯部门。解开这些实验对SM之外的物理学的影响需要对理论有非微扰的理解。PI打算通过使用LGT开发对Higgs-Top-Gluon模型的详细理解来探索这一点。这个模型捕捉到了SM的基本耦合，因为正则化截止被推到高能量，并将帮助我们看到SM在哪里崩溃，预示着新的物理学。我们小组的第三个主要研究是夸克禁闭的性质。有许多LGT证据表明禁闭与规范场的拓扑激发有关，如瞬子、涡旋和单极子。这一提议代表了太平洋大学一个新的格点规范理论（LGT）小组的成立。这将为本科生在一个强调计算物理的可访问领域带来研究可能性。