报告题目：New Structures and Formulations for S-matrices

报告人：何颂 副研究员 （中国科学院理论物理研究所）

报告时间：2019年1月9日（周三）上午10:00  

报告地点：物理学院新楼多功能厅

报告摘要:

In the past decades and especially the last one, powerful new tools and remarkable new structures for perturbative scattering amplitudes in QFT have been discovered. Apart from playing a prominent role in high-energy particle physics, these developments have important implications in a wide range: from string perturbation theory to multi-loop calculations in (super)-gravity, from new mathematics to all-loop amplitudes in N=4 SYM. I will review some recent progress, with focus on two topics: (1) a string-inspired new formulation for amplitudes in gauge theories and gravity, and double-copy between them (2) new geometric structures underlying amplitudes which may hint at a "theory at infinity" for S-matrices.

邀请人：杜一剑副教授