Time: 14:00 (UTc/GMT+8:00,Beijing/Shanghai), Dec. 10 (Thur.), 2020
Venue: KITS Seminar Room, 4th floor, No. 7 Building, UCAS Zhong-Guan-Cun Campus [View on maps]
Speaker: Song He (ITP, CAS)
In the past decades, powerful computational tools and remarkable new structures for perturbative scattering amplitudes in QFT have been discovered. These developments have important implications not only for high-energy particle physics, but also for a wide range of subjects: from string perturbation theory to multi-loop calculations in (super)-gravity, from new mathematics to AdS/CFT. I will review some recent progress, focusing 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.