理论物理所

Talks

Location: Home>Activities>Talks

(Seminar) The Infrared Structures of Scalar Effective Field Theories

09/05 2018
  • Title (Seminar) The Infrared Structures of Scalar Effective Field Theories
  • Speaker
  • Date
  • Venue
    • Abstract

    CAS Key Laboratory of Theoretical Physics

    Institute of Theoretical Physics

     Chinese Academy of Sciences

    Seminar

    Title

    题目

    		 The Infrared Structures of Scalar Effective Field Theories

    Speaker

    报告人

    Zhewei Yin

    Affiliation

    所在单位

    Northwestern University

    Date

    日期

    		 2:30pm, Sep 5, 2018, Wednesday

    Venue

    地点

    		 Conference Room 6420, ITP new building

    Abstract

    摘要

    		 There is a rich history of research on effective field theories (EFTs) of scalar fields, and recent development shows that several such theories can be entirely fixed by minimal assumptions including the soft behavior of the amplitudes. By treating the soft behavior as a consequence of the Ward identity of the shift symmetry, we are able to realize this "soft bootstrap" idea by constructing the Lagrangian of the nonlinear sigma model. This approach enables us to study new soft theorems of scalar EFTs, and take a step further toward understanding the underlying structures of the mysterious "extended theories" first discovered in the amplitude program.

    Contact person

    所内联系人

    		 Song He