报告题目：Constructing canonical Feynman integrals using intersection theory 

报  告 人：  杨李林   教授（浙江大学）

报告时间：2020 年 11 月 05 日（周四）15：30

报告地点：在线报告（ 腾讯会议 ID : 537 4946 4937）

报告摘要：

Canonical Feynman integrals are of great interest in the study of scattering amplitudes at the multi-loop level. In this talk, I introduce our recent proposal to construct dlog-form integrals of the hypergeometric type, which satisfy canonical differential equations. In order to relate them to Feynman integrals, I introduce the concept of intersection theory, and use it to project the dlog-form integrals into canonical master integrals. This provides a constructive way to find a basis of Feynman integrals whose differential equations can be solved easily. I present several examples of both maximally cut integrals and uncut ones at one and two loops, and demonstrate the applicability of our method in problems with multiple scales.

报告人简介：杨李林，2007年毕业于北京大学物理学院，随后赴德国美因茨大学和瑞士苏黎世大学做博士后研究。2012年至2019年于北京大学物理学院任研究员。2020年至今于浙江大学物理学系任教授。