The hadron spectrum from QCD sum-rules

QCD 求和规则的强子谱

• 批准号: 327548-2010
• 负责人: Harnett, Derek
• 金额: $ 1.09万
• 依托单位: Fraser Valley
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=481773
• 关键词: hadron; spectrum; QCD; sum; rules

Particle physics is the study of matter and forces at the smallest known distance scales. As we move to smaller and smaller distances, a certain hierarchy emerges: matter is made of molecules, molecules are made of atoms, atoms are made of electrons and nuclei, and nuclei are made of protons and neutrons. It was realized in the 1970's that protons and neutrons themselves are made of even smaller particles called quarks. The force responsible for holding the quarks together is called the strong nuclear force and the corresponding physical theory is called quantum chromodynamics (QCD). Quark combinations aside from protons and neutrons are also possible, and the resulting bound states are collectively referred to as hadrons. An important problem currently being researched in particle physics is that of trying to predict the properties of these hadrons based on known properties of the quarks that each contains. Such properties include mass, lifetime, and decay modes. In particular, I am investigating an as yet undiscovered class of particles called hybrids whose existence is predicted by theory. However, such particles have yet to be conclusively identified in experiment.

粒子物理学是对最小的已知距离尺度上物质和力的研究。 随着我们转移到越来越小的距离时，出现了一定的层次结构：物质是由分子制成的，分子是由原子制成的，原子是由电子和核制成的，核是由质子和中子制成的。 在1970年代，质子和中子本身是由称为夸克的较小颗粒制成的。 负责将夸克组合在一起的力称为强核力量，相应的物理理论称为量子染色体动力学（QCD）。 除质子和中子外，夸克组合也可能是可能的，并且由此产生的约束状态共同称为Hadron。 当前在粒子物理学中研究的一个重要问题是，试图根据每个夸克的已知特性来预测这些黑龙的特性。 这样的属性包括质量，生命周期和衰减模式。 特别是，我正在研究一种尚未发现的粒子类，称为杂种，其存在是通过理论预测的。 但是，在实验中尚未确定此类粒子。