專題演講

2021/04/09(Fri)     11:00 -12:00    五樓第一會議室5th Floor(1st meeting room)

Title

An On-shell Formulation of Chiral Perturbation Theory

Speaker

Prof. Ian Low

Department of Physics and Astronomy, Northwestern University

Abstract

We will discuss an entirely on-shell formulation of the mesonic sector of Chiral Perturbation Theory (ChPT), without recourse to the Lagrangian, which is based on recent progresses in understanding the infrared structure of Nambu-Goldstone bosons. The construction provides an efficient method to enumerate the low-energy constants of ChPT, in which operators relations such as those arising from equations of motion, integration-by-parts, hermiticity, and symmetry structure, manifest themselves in simple ways.