Effective operators are the building blocks of effective field theories (EFT), which describe all sorts of interactions among the low energy degrees of freedom under the symmetry constraints. Recent studies manifest the great potential of on-shell techniques for the computations related to effective operators. In this talk, I will show the basic applications of on-shell techniques, including the operator/amplitude correspondence, operator basis construction and the j-basis analysis. In particular, a systematic reduction rule for effective operators is built, which involves a thorough treatment of the field redefinition ambiguity. The rule allows for a clear organization of the results from EFT computations such as matching and running. Future studies on the amplitude construction in EFT may also be introduced.

报告人简介

肖明磊，主要研究方向为高能物理理论，发表论文19篇，主持博士后面上项目1项。研究领域涵盖粒子物理唯象学、宇宙学、量子引力的全息原理、量子信息、散射振幅与有效场论。近年来在有效场论的散射振幅方法上获得了突破性成果，解决了有效场论算符基的冗余问题。

邀请人

于江浩 研究员