Interactions of Particles, Fields and Strings

粒子、场和弦的相互作用

• 批准号: 0244821
• 负责人: Howard Georgi
• 金额: $ 195.05万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0244821&HistoricalAwards=false
• 关键词: Interactions; Particles; Fields; Strings

The proposed research involves group research in Particle, Fields and Strings. The group proposes to explore physics beyond the standard model with an eye on understanding two important fine-tuning problems, the hierarchy problem (why are the masses of the particles very different (much lighter) than the Planck mass) and the cosmological constant problem. In the context of higher dimensions, the hierarchy problem becomes why are the extra dimensions so large? The PI's intend to explore discretized extra dimensions as a method of constructing new classes of field theories using the principle of deconstruction. This is an entirely new method of model building. As an alternative to Supersymmetry and its inherent doubling of the spectrum of particles being the relevant physics expected at new colliders such as LHC, the PI's are exploring a qualitatively new approach to the hierarchy problem based on having a light Higgs that is a pseudo-Goldstone Boson. This approach is called the "little Higgs" model and it has new predictions for TeV Physics. The PI's intend to continue their exploration of duality symmetries as well as the geometric engineering of quantum field theories using string geometry.

提议的研究涉及粒子、场和弦的小组研究。该小组建议探索超越标准模型的物理学，着眼于理解两个重要的微调问题，即层次问题（为什么粒子的质量与普朗克质量差别很大（轻得多））和宇宙常数问题。在高维的情况下，层次问题变成了为什么额外的维度如此之大？PI打算探索离散的额外维度，作为使用解构原理构建新类别场论的方法。这是一种全新的模型构建方法。作为一种替代方案，超对称及其固有的粒子谱加倍是新型对撞机（如大型强子对撞机）所期望的相关物理，PI正在探索一种定性的新方法来解决层次问题，该方法基于拥有一个轻希格斯粒子，即伪戈德斯通玻色子。这种方法被称为“小希格斯”模型，它对TeV物理学有了新的预测。PI计划继续探索对偶对称性以及使用弦几何的量子场论的几何工程。