Double soft theorems and shift symmetry in nonlinear sigma models

Ian Low*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We show that both the leading and subleading double soft theorems of the nonlinear sigma model follow from a shift symmetry enforcing Adler's zero condition in the presence of an unbroken global symmetry. They do not depend on the underlying coset G/H and are universal infrared behaviors of Nambu-Goldstone bosons. Although nonlinear sigma models contain an infinite number of interaction vertices, the double soft limit is determined entirely by a single four-point interaction, together with the existence of Adler's zeros.

Original languageEnglish (US)
Article number045032
JournalPhysical Review D
Volume93
Issue number4
DOIs
StatePublished - Feb 25 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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