Perturbing QCD with external fields

TL;DR

This paper investigates how external chromomagnetic and monopole background fields influence the QCD phase transition, revealing that monopole fields do not alter the critical temperature, while chromomagnetic fields do, based on lattice simulations.

Contribution

The study provides updated lattice simulation results on the impact of external fields on QCD phase transition parameters, especially refining estimates in chromomagnetic backgrounds.

Findings

Monopole background fields do not change the QCD critical temperature.

Chromomagnetic fields modify the QCD critical temperature.

Refined estimates of QCD critical parameters in chromomagnetic backgrounds.

Abstract

We present some up-to-date results on QCD phase transition in a chromomagnetic constant background field and in an abelian monopole background field. Our results indicate that the QCD critical temperature is not modified by a monopole background field, whilst it is modified by a constant chromomagnetic field. We improve our earlier estimate of the QCD critical parameters in a chromomagnetic background field by performing lattice simulations with weaker fields.