Gauged Nambu-Jona-Lasinio model and axionic QCD string

TL;DR

This paper introduces an axionic QCD string model integrated with a gauged NJL framework, exploring axial anomaly effects through topological couplings and vortex structures, emphasizing the role of quark condensate phases.

Contribution

It develops a novel combined model of axionic QCD strings and gauged NJL, linking flux-tube concepts with topological anomaly mechanisms.

Findings

Topological couplings from the string perspective elucidate axial anomaly.

The 't Hooft vortex is incorporated into the NJL model to study anomaly effects.

The phase distribution of the quark condensate is crucial in the proposed scenario.

Abstract

We propose an axionic QCD string scenario based on the original flux-tube model by Kogut and Susskind, and then incorporate it into a gauged Nambu-Jona-Lasinio (NJL) model. Axial anomaly is studied by a new topological coupling from the string side, and by the 't Hooft vortex from the NJL side, respectively. The nontrivial phase distribution of the quark condensate plays an important role in this scenario.