The chiral crossover, static-light and light-light meson spectra, and the deconfinement crossover

TL;DR

This paper investigates the effects of finite temperature on chiral crossover, meson spectra, and deconfinement transition using a confining, chiral invariant quark model with temperature-dependent parameters.

Contribution

It introduces a temperature-dependent analysis of meson spectra and quark masses within a confining quark model related to Coulomb gauge QCD, focusing on linear confinement effects.

Findings

Temperature influences on constituent quark mass and meson spectra.

Correlation between string tension and deconfinement transition.

Polyakov loop behavior at finite temperature.

Abstract

We study the chiral crossover, the spectra of light-light and of static-light mesons and the deconfinement crossover at finite temperature T. Our framework is the confining and chiral invariant quark model, related to truncated Coulomb gauge QCD. Since we are dealing with light quarks, where the linear potential dominates the quark condensate and the spectrum, we only specialize in the linear confining potential for the quark-antiquark interaction. We utilize T dependent string tensions previously fitted from lattice QCD data, and a fit of previously computed dynamically generated constituent quark masses. We scan the T effects on the constituent quark mass, on the meson spectra and on the polyakov loop.