To simplify analytic coefficients in multi-loop Feynman integral reduction

by Prof. Yang Zhang (USTC)

Thursday 3 Jun 2021, 10:30 → 11:30 Asia/Shanghai

CHEP

Feynman integral reduction is a key problem in the computation of multi-loop scattering amplitude and cross section. One of the difficulty for the integral reduction is that the reduction may produce very complicated coefficients. We present our algebraic geometry based partial fraction method for the analytic coefficient reduction, and show that for complicated cases, our method can reduce the coefficient size by two orders of magnitudes. Our method can also be used for the simplification of other analytic results related to multi-loop computations. Introduction of the speaker: 张扬，中国科学技术大学教授，瑞士自然科学基金会Ambizione Fellow获得者。他于美国康奈尔大学获得博士学位，曾先后在丹麦玻尔研究所、瑞士ETH-Zurich、德国马克思•普朗克研究所从事研究工作，致力于量子场论中高圈振幅计算。 Tencent Meeting: https://meeting.tencent.com/s/8d7ydoCug7fi ID: 602 207 103