Chiral condensate beyond one-loop approximation

TL;DR

This paper investigates a two-dimensional fermion-scalar model with Yukawa interaction beyond one-loop, revealing phase transitions and decay of excited scalar states, thus providing deeper insight into non-perturbative effects.

Contribution

It extends the analysis of the chiral condensate beyond one-loop approximation, uncovering new phenomena such as scalar state decays and phase transitions.

Findings

Discovery of phase transitions in the model

Identification of decays of excited scalar states

Insights into non-perturbative effects beyond one-loop

Abstract

We study two-dimensional model with a fermion field and a self-interaction scalar field with the Yukawa interaction beyond the framework of the one-loop approximation. We show that in the model besides a phase transitions appear decays of the excited scalar states.