Research in High Energy Physics: Theory and Phenomenology of Supersymmetry

PI计划研究高能对撞机物理前沿的问题。目前，已知基本亚原子粒子的性质和相互作用被一种叫做标准模型的理论非常精确地描述了。然而，随着实验探测更高能量的相互作用，标准模型几乎肯定需要扩展。PI计划详细了解超越标准模型的下一层物理学最有希望的可能性，即超对称。超对称的关键预测是，对于每一个已知的基本粒子，必须有一个具有非常相似性质但自旋（或固有角动量）不同的超级伙伴。新的超级伴侣粒子被认为比目前已知的粒子重得多，也更不稳定，这解释了为什么它们到目前为止还没有被发现。提出的研究的主要目标之一是研究超对称预测的新粒子可能在当前和未来的实验中被探测和研究的精确方式。PI还将开发精确的计算和工具，这将有助于解释和理解未来超对称的潜在发现。他将提出更精确的公式，把新粒子的质量与基础理论的参数联系起来。这对于理解超对称破缺是至关重要的，这是导致这些新粒子非常重的机制。PI还计划研究最小超对称理论的各种变体，这些变体可以做出独特的预测，如果发现超级伙伴，这些预测可以通过实验进行验证。该研究将影响正在升级的费米实验室Tevatron -反质子对撞机、即将启动的CERN LHC质子-质子对撞机以及未来可能的线性电子-正电子对撞机或超大型强子对撞机的实验规划和解释。该提案包括一个项目，将超对称粒子谱的当前和未来精确计算整合到一个公开可用的计算机程序中。他还参与编写了一本关于超对称的教科书。

The PI proposes to investigate problems at the frontiers of high-energy collider physics. At present, the properties and interactions of the known fundamental subatomic particles are very accurately described by a theory called the Standard Model. However, the Standard Model will almost certainly need to be extended as experiments probe interactions at ever higher energies.The PI plans to pursue detailed understanding of the most promising possibility for the next layer of physics beyond the Standard Model, namely, supersymmetry. The key prediction of supersymmetry is that for each of the known fundamental particles, there must be a superpartner with very similar properties but different spin (or intrinsic angular momentum). The new superpartner particles are thought to be much heavier and more unstable than the presently known particles, which explains why they have eluded discovery so far. One of the main goals of the proposed research is to study the precise manner in which the new particles predicted by supersymmetry might be detected, and then studied, in present and future experiments. The PI will also develop precise alculations and tools that will aid in the interpretation and understanding of a future potential discovery of supersymmetry. He will produce more accurate formulas relating the masses of the new particles to the parameters of the underlying theory. This will be essential for understanding supersymmetry breaking, which is the mechanism that causes these new particles to be very heavy. The PI also plans to investigate variations of the minimal supersymmetric theory that make distinctive predictions which can be experimentally tested if superpartners are discovered. The proposed research will affect the planning and interpretation of experimentsat the upgraded Fermilab Tevatron proton-antiproton collider in progress, the imminent CERN LHC proton-proton collider, and a possible future linear electron-positron collider or very large hadron collider. This proposal includes a project to integrate present and future precise calculations of the supersymmetric particle spectrum into a publicly available computer program. He is also co- writing a textbook on Supersymmetry.