张扬 教授学术报告
Title: Frontiers of Multiloop and Multileg Feynman integrals: 2loop 6point and 3loop 5point
Speaker: Yang Zhang (张扬)
Affiliation: University of Science and Technology of China (中国科学技术大学)
Time: 14:00-16:00, Wednesday, 14th May, 2025 (UTC+8, Beijing Time)
Venue: Room 1502, Shing-Tung Yau Center, Yifu Architecture Building, Sipailou Campus of Southeast University, Nanjing（东南大学四牌楼校区逸夫建筑馆丘成桐中心1502室）
Inviter: Zhengwen Liu(刘正文)
Abstract
With the development on canonical differential equation, UT integral basis, NeatIBP for generating short IBP systems, the era of analytic computations of multi-loop multi-leg multi-scale Feynman integrals is coming. We analytically computed all 2loop 6point planar massless Feynman integrals. This is the first two-loop analytic Feynman integral computation with eight scales. We also computed the 3loop pentagon-box-box integral family, which is the most complicated Feynman integral family calculated analytically.
Speaker
Zhang Yang has been a Professor at the University of Science and Technology of China (USTC) since 2019, specializing in theoretical high-energy particle physics. He received his BSc in Physics from USTC in 2005 and his PhD in Physics from Cornell University in 2011. He subsequently held postdoctoral research positions at the Niels Bohr Institute in Denmark (2011–2014) and at ETH Zurich in Switzerland (2014–2015). In 2015, he was awarded a prestigious Ambizione Fellowship by the Swiss National Science Foundation to conduct research at ETH Zurich (2015–2018), becoming the first Chinese recipient of this fellowship. From 2017 to 2018, he served as a group leader (Projektgruppenleiter, EG15) at JGU Mainz, and from 2018 to 2019 he held a similar position at the Max Planck Institute for Physics in Munich, Germany. His research interests include scattering amplitudes, perturbative quantum chromodynamics (QCD), particle physics, integrable systems, and computational algebraic geometry.