Lattice Field Theory and Hadronic Physics

晶格场论和强子物理

• 批准号: 0555375
• 负责人: Rajamani Narayanan
• 金额: --
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0555375&HistoricalAwards=false
• 关键词: Lattice; Field; Theory; Hadronic; Physics

Quarks carry a color charge and nuclear matter is formed from thebinding of colored quarks mediated by gluons. Quantum Chromo-Dynamics(QCD) is the theory that describes the interaction of these colorcharges. Experiments have shown than quarks come in three colors butall nuclear matter is color neutral. Separation of nuclear matter intoquarks and gluons needs very large energies similar to what waspresent in the early universe. Since solving QCD with three colorshave proven to be very difficult and since qualitative properties donot depend on the number of colors, an attempt following 't Hooft ismade to solve QCD for a very large number of colors. We have alreadyshown that quarks form a colorless condensate and we have alsosucceeded in computing the properties of the lightest colorlessparticle - the pion. We will attempt to compute the masses of otherheavier colorless particles as part of this proposal. We will alsoattempt to study the effect of temperature thereby showing evidencefor the formation of nuclear matter from a primordial soup of quarksand gluons.The scientific methods involve analytical calculations and numericalcomputations. A graduate student and several undergraduate students atFIU will make significant contributions. Large scale computer clustersat national labs will be used for numerical computations and theresults obtained as part of this proposal will be presented atinternational conferences in nuclear and particle physics.

夸克携带色荷，核物质是由胶子介导的有色夸克结合形成的。量子色动力学（QCD）是描述这些色荷相互作用的理论。实验表明夸克有三种颜色，但所有的核物质都是中性的。将核物质分离成夸克和胶子需要非常大的能量，类似于早期宇宙中存在的能量。由于用三种颜色求解QCD已被证明是非常困难的，并且由于定性性质不依赖于颜色的数量，因此我们尝试在Hooft之后求解大量颜色的QCD。我们已经证明了夸克形成了一种无色的凝聚体，我们还成功地计算出了最轻的无色粒子——介子的性质。我们将尝试计算其他较重的无色粒子的质量，作为这个提议的一部分。我们还将尝试研究温度的影响，从而为从夸克和胶子的原始汤中形成核物质提供证据。科学方法包括解析计算和数值计算。一名研究生和几名本科生将做出重大贡献。大型计算机集群和国家实验室将用于数值计算，作为该提案的一部分获得的结果将在核物理和粒子物理的国际会议上发表。