Investigations in High Energy Physics

该奖项资助匹兹堡大学教授Ayres Freitas和Adam Leibovich的研究活动。 作为他们研究的一部分，Freitas和Leibovich教授的目标是开发改进的理论工具和计算方法，用于对当前和未来粒子物理实验的结果进行稳健的解释，无论是在最高能量的对撞机还是在寻找暗物质的专用实验中。 特别是，他们将开发先进的技术来识别一个潜在的小的新的物理信号-这需要对已知粒子和相互作用有非常精确的理解。 此外，Freitas和Leibovich教授将研究各种类型的暗物质模型的现象学意义，特别关注在大多数搜索实验中极难探测的场景。 因此，为了约束这些模型，将联合收割机的实验室研究与天体物理学和宇宙学的约束结合起来是至关重要的。 因此，这一领域的研究通过促进美国基础科学的发展和扩大我们对基本物理定律的知识来促进国家利益。 该项目还将涉及教育几名博士生和一名博士后研究员掌握尖端的计算和分析工具。 Freitas和Leibovich教授还计划与天体物理学家和高能实验学家密切合作，开发新的搜索和分析策略，以帮助寻找新的物理学，并提高我们目前理解的精度和理论鲁棒性。 Freitas教授和Leibovich教授还将帮助组织研讨会和暑期学校，向更多的学生和年轻研究人员传播现代研究成果。从技术上讲，Freitas教授和Leibovich教授的研究计划可以分为三个主要部分：（1）发展与计划中的未来e+e-相关的电弱精密观测量高阶修正的计算技术。（2）应用有效场论，特别是软共线有效场论，在大型强子对撞机上产生喷流，将部分子碎裂成强子，以及新的物理特征;以及（3）对标准模型的各种暗区扩展的研究，包括轻弱耦合信使场，这些场可以用非传统的实验装置而不是高能对撞机更有效地探测。 这项研究计划是由正在进行的和计划中的实验粒子物理学的努力，结果将提供给实验社区在一个合适的形式。这个奖项反映了NSF的法定使命，并已被认为是值得通过评估使用基金会的知识价值和更广泛的影响审查标准的支持。

This award funds the research activities of Professors Ayres Freitas and Adam Leibovich at the University of Pittsburgh. As part of their research, Professors Freitas and Leibovich aim to develop improved theoretical tools and calculational methods for the robust interpretation of results from current and future particle-physics experiments, both at the highest-energy colliders and at dedicated experiments searching for dark matter. In particular, they will develop advanced techniques for identifying a potentially small new physics signal --- an endeavor that requires an extremely precise understanding of known particles and interactions. Furthermore, Professors Freitas and Leibovich will investigate the phenomenological implications of various types of dark-matter models, with particular attention to scenarios that will be extremely difficult to probe in most search experiments. To constrain these models, it is therefore crucial to combine laboratory searches with constraints from astrophysics and cosmology. As such, research in this area advances the national interest by fostering the development of basic science within the United States and expanding our knowledge of fundamental physical laws. This project will also involve educating several PhD students and a postdoctoral researcher in cutting-edge calculational and analysis tools. Professors Freitas and Leibovich also plan to work closely with astrophysicists and high-energy experimentalists to develop new search and analysis strategies that will aid in the search for new physics and improve the precision and theoretical robustness of our present understanding. Professors Freitas and Leibovich will also help to organize workshops and summer schools to disseminate results from modern research to a larger audience of students and young researchers.More technically, the research program of Professors Freitas and Leibovich can be divided into three main parts: (1) The development of calculational techniques for higher-order corrections to electroweak precision observables which are relevant for planned future e+e- colliders as well as for several low-energy precision experiments currently in development at Jefferson Laboratory and the MESA accelerator; (2) The application of effective field theories, in particular Soft-Collinear Effective Theory, for production of jets at the Large Hadron Collider, fragmentation of partons into hadrons, and new physics signatures; and (3) An investigation of a varied class of dark-sector extensions of the Standard Model, including light weakly coupled messenger fields that could be more efficiently probed with non-traditional experimental setups rather than at high-energy colliders. This research plan is guided by ongoing and planned experimental particle-physics efforts, and results will be made available to the experimental community in a suitable form.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.