Investigations in High Energy Physics

该奖项资助匹兹堡大学的Ayres Freitas教授和Adam Leibovich教授的研究活动。这个项目的目的是开发改进的理论工具和计算方法，以便对当前和未来粒子物理实验的结果进行可靠的、独立于模型的解释，无论是在最高能量的对撞机上，如大型强子对撞机上，还是在较低能量的精确测量上。识别新物理学中潜在的小信号需要对已知粒子和相互作用有很好的了解。此外，我们将使用一个称为“有效场论”的框架，研究与模型无关的描述新物理效应的技术。因此，这一领域的研究通过促进科学最基本的方向之一--发现和理解新的物理定律--来促进国家利益。在这项努力的同时，国际和平研究所还将教授一门关于有效场论和精确物理的专题课程。这两者都是典型的粒子物理教科书中经常被忽视的主题。从技术上讲，该研究计划可以分为三个主要部分：(1)发展对弱电性精密观测的三环修正的计算技术，并将这些观测的现有和新的理论结果整合到一个灵活的、面向对象的计算机程序中；(2)有效场论，特别是软共线有效理论，应用于强子对撞机上尚未解决的问题，如喷注、夸克产生和低x物理过程；以及(3)综合研究有效场论在希格斯物理、电弱物理和味物理中的应用，重点研究算符之间的关联、不同质量尺度在新物理学领域中的作用以及暗物质模型中出现的复杂性。这项研究计划是由正在进行和计划中的实验高能物理努力指导的，结果将以适当的形式提供给实验界。

This award funds the research activities of Professors Ayres Freitas and Adam Leibovich at the University of Pittsburgh.This purpose of this project is to develop improved theoretical tools and calculational methods for the robust, model-independent interpretation of results from current and future particle-physics experiments, both at the highest-energy colliders, such as the Large Hadron Collider, and for lower-energy precision measurements. The identification of a potentially small signal of new physics requires an excellent understanding of known particles and interactions. Furthermore, we will investigate techniques for model-independent descriptions of the effects of new physics, using a framework called "effective field theories". As a result, research in this area advances the national interest by promoting the progress of science in one of its most fundamental directions: the discovery and understanding of new physical laws. In conjunction with this effort, the PI's will also teach a special-topics course on effective field theories and precision physics. Both are topics that are often neglected in typical particle-physics textbooks. More technically, the research program can be divided into three main parts: (1) The development of calculational techniques for three-loop corrections to electroweak precision observables, and the integration of existing and new theoretical results for these observables into a flexible, object-oriented computer program; (2) The application of effective field theories, in particular Soft-Collinear Effective Theory, to unresolved questions at hadron colliders, such as processes involving jets, quarkonium production, and low-x physics; and (3) A comprehensive study of the use of effective field theories for new physics in Higgs, electroweak and flavor physics, with a focus on investigating correlations between operators, the role of different mass scales in the new-physics sector, and complications that arise in models of dark matter. This research plan is guided by ongoing and planned experimental high-energy physics efforts, and results will be made available to the experimental community in a suitable form.