On strongly coupled quenched QED4, again: chiral symmetry breaking, Goldstone mechanism and the nature of the continuum limit

TL;DR

This paper investigates whether strongly coupled quenched QED4 can have a trivial continuum limit, analyzing chiral symmetry breaking and Goldstone mechanisms, and finds evidence against triviality based on their data.

Contribution

It provides a detailed analysis of chiral symmetry breaking and Goldstone mechanisms in quenched QED4, clarifying previous ambiguities and contrasting results with Nambu--Jona Lasinio models.

Findings

Data does not support a trivial continuum limit scenario.

Detailed interplay between chiral symmetry breaking and Goldstone modes clarified.

Past puzzling features of quenched QED4 results are addressed.

Abstract

We explore the possibility of a trivial continuum limit of strongly coupled quenched QED4 by contrasting our results with a Nambu--Jona Lasinio equation of state. The data does not compare favorably with such scenario. We study in detail the interplay of chiral symmetry breaking with the Goldstone mechanism, and clarify some puzzling features of past results.