The Fate of Celestial Symmetries
演讲者
时间
2023年11月07日 10:00 至 12:00
地点
A3-2-301
线上
Zoom 518 868 7656
(BIMSA)
摘要
In this talk, we start by introducing celestial symmetries and using these symmetries to organize the data in phase space. Specifically, a systematic cataloging of the generators of celestial symmetries on phase space is presented, which contains a semi-infinite tower of higher-spin light-ray operators. Moreover, in the phase space representation, the emergence of two-particle and multi-particle operators is a natural consequence, essential for the algebra to close. To study the multi-particle states in celestial CFT, in the second part of this talk, we discuss the holomorphic multi-collinear limit of amplitudes and derive celestial 3-OPEs. In particular, in $\phi^3$ theory, celestial 3-OPE contains a term with a branch cut. This term addresses an ongoing debate in the literature about Jacobi identity and associativity of the celestial OPEs. We further use this result to deduce a new (multi-particle) term in celestial two-particle OPE.
演讲者介绍
Dr. Yangrui Hu is an Assistant Professor at BIMSA from 2025. She earned her Ph.D. in physics from Brown University in 2022, and was a postdoctoral fellow at the Perimeter Institute from 2022 to 2024 and at University of Waterloo from 2024 to 2025. Her research interests center on theoretical physics, specifically in the areas of AI+quantum, quantum information, and high-energy theory.