Simplest phonons and pseudo-phonons in field theory

Abstract We study the emergence of Nambu–Goldstone modes due to broken translation symmetry in field theory. Purely spontaneous breaking yields a massless phonon which develops a mass upon introducing a perturbative explicit breaking. The pseudo-phonon mass agrees with Gell Mann-Oakes-Renner relatio...

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Bibliographic Details
Main Author: Daniele Musso
Format: Article
Language:English
Published: SpringerOpen 2019-12-01
Series:European Physical Journal C: Particles and Fields
Online Access:https://doi.org/10.1140/epjc/s10052-019-7498-5