The QCD Mass Spectrum

QCD 质谱

• 批准号: 327548-2007
• 负责人: Harnett, Derek
• 金额: $ 0.73万
• 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: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=397831
• 关键词: QCD; Mass; Spectrum

Quantum chromodynamics (QCD) is the theory of physics that describes the strong nuclear force. The strong force is responsible for binding together protons and neutrons to form atomic nuclei. However, we now know that protons and neutrons themselves are made up of even smaller particles known as quarks and so, in this light, the strong force ought to be thought of as the interaction responsible for binding quarks together. Particles like protons and neutrons which are comprised of quarks are collectively referred to as hadrons, and, in the last 75 years, loads of new hadrons have been discovered. A major goal in particle physics today then is to predict hadron properties from known properties of quarks. This is a lot tougher than it sounds! The whole is not simply the sum of the parts here.

量子色动力学(QCD)是描述强核力的物理理论。这种强大的力负责将质子和中子结合在一起，形成原子核。然而，我们现在知道，质子和中子本身是由被称为夸克的更小的粒子组成的，因此，从这个角度来看，这种强大的力应该被认为是负责将夸克结合在一起的相互作用。像质子和中子这样由夸克组成的粒子被统称为强子，在过去的75年里，发现了大量新的强子。因此，今天粒子物理学的一个主要目标是根据夸克的已知性质来预测强子性质。这比听起来难多了！整体并不是这里各个部分的简单总和。