Theoretical Particle Physics

本小组提案的PI计划开展以下项目。格罗斯曼计划研究风味物理学的不同方面。这包括传统的探测，如B介子，D介子和K介子物理学，但也有新的，如顶部生产和衰变，以及标准模型之外的物理学方面的味道。Csaki和Perelstein计划将他们的注意力集中在理解电弱对称性破缺和层次稳定模型的结构和特征上，包括超对称、额外维度和小希格斯模型。一旦LHC实验开始，他们希望专注于数据的理论解释，最终目标是确定电弱对称性破缺的机制。他们还将研究粒子物理学和宇宙学的接口问题，旨在了解LHC数据对宇宙学问题的影响，如暗物质的性质和电弱相变的动力学。在弦理论中，麦卡利斯特和泰伊建议研究导致稳定模的证明，并使用这些设置来找到弦理论中膨胀的现实实现。这为解决暴胀的理论问题提供了一个严格的框架，也为弦理论的实验约束提供了最好的前景。麦卡利斯特和泰伊将追求这两个方面的联系。Lepage建议使用晶格模拟在百分之几的水平上寻找B和D介子物理观测值的理论预测，其中一些将与CLEO-c的即将到来的结果进行比较。Kinoshita建议计算轻子g - 2的八阶和十阶QED贡献，这将使精细结构常数的最精确确定成为可能，并给出QED最严格的检验。在更正式的方面，勒克莱尔提议研究低维量子场论，并将其应用于凝聚态系统和弦理论。该小组致力于培养下一代理论物理学家，特别是在LHC物理学和宇宙学领域。康奈尔大学粒子理论小组定期在当地高中和SPS的当地分会演讲，并参加当地和国外的广泛推广活动。作为康奈尔大学基本粒子物理实验室（LEPP）的一部分，为与在LHC从事CLEO-c和CMS实验的实验同事进行互动提供了独特的机会，该小组为实验计划提供了理论支持。

The PIs on this group proposal intend to work on the following projects. Grossman plans to study different aspects of flavor physics. This includes traditional probes like B meson, D meson and K-meson physics, but also new ones, like top production and decays, and flavor aspects of physics beyond the standard model. Csaki and Perelstein plan to focus their attention on understanding the structure and signatures of models of electroweak symmetry breaking and of hierarchy stabilization, including supersymmetric, extra-dimensional and little Higgs models. Once the LHC experiments start, they expect to focus on theoretical interpretation of the data, with the ultimate goal of determining the mechanism of electroweak symmetry breaking. They will also work on issues at the interface of particle physics and cosmology, aiming to understand the implications of the LHC data for cosmological questions such as the nature of dark matter and the dynamics of the electroweak phase transition. In string theory, McAllister and Tye propose to study certifications that result in stabilized moduli, and to usethese setups to find realistic implementations of inflation in string theory. This provides a rigorous framework for resolving theoretical issues in inflation, and also provides the best prospect for experimental constraints on string theory. McAllister and Tye will pursue both aspects of this connection. Lepage proposes to use lattice simulations to finnd theoretical predictions for B and D meson physics observables at the few percent level, some of which will be compared to forthcoming results from CLEO-c. Kinoshita is proposing to calculate the eighth and tenth order QED contributions to the lepton g - 2,which will enable the most precise determination of the fine structure constant and also give the most stringent tests of QED. On the more formal side, LeClair is proposing to study quantum field theories in lower dimensions, with potential applications to condensed matter systems and string theory. The group is committed to training the next generation of theoretical physicists especially in the areas of LHC Physics and Cosmology. The Cornell particle theory group regularly lecture at the local high school and at the local chapter of SPS, and participate in a wide range of outreach activitiesboth locally and abroad. Being part of the Laboratory for Elementary Particle Physics (LEPP) at Cornell provides unique opportunities for interactions with experimental colleagues working on CLEO-c and the CMS experiment at the LHC and the group provides theoretical support for the experimental program.