Universal Methods for High-Order Feynman Diagram Computations

by Zheng-Yang Li (Theory & Computational Physics Division at Jefferson Lab)

Saturday 14 Jun 2025, 14:00 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N4F-N400 - meeting room (Tsung-Dao Lee Institute)

Abstract： Feynman diagrams are a cornerstone of perturbative quantum field theory, providing a powerful tool for calculating correlation functions and scattering amplitudes. In this talk, I will present a set of broadly applicable methods for addressing high-loop Feynman diagram computations with intricate features—including those involving Wilson lines defined in position space and problems with multiple scales. These methods include differential equations, difference equations, and finite-field techniques. I will illustrate these methods with concrete examples, demonstrating their effectiveness in enabling high-order computations and extracting physically meaningful results.

 

Biography： Zheng-Yang Li (李正阳) received the B.S. degree in Mechanical Engineering and Automation from University of Science and Technology of China in 2013 and the Ph.D. degree in Theoretical Physics from Peking University in 2021. He served as a Post-Doctoral Fellow at Theory & Computational Physics Division at Jefferson Lab between 2021 and 2025. His research interests include High Energy Physics - Phenomenology and High Energy Physics - Lattice.

 

Tencent Meeting ID: 389198843

Password: 630979