Light tetraquark state at nonzero temperature

TL;DR

This paper investigates how a light tetraquark state influences the chiral phase transition at finite temperature, showing it lowers the critical temperature and causes mixing effects with quarkonium.

Contribution

It introduces a scenario where the $f_{0}(600)$ resonance is modeled as a tetraquark, analyzing its impact on chiral symmetry restoration at nonzero temperature.

Findings

Critical temperature is lowered by the tetraquark presence

Transition becomes softer with the tetraquark influence

Mixing effects between tetraquark and quarkonium are significant

Abstract

We study the implications of a light tetraquark on the chiral phase transition at nonzero temperature $T$: The behavior of the chiral and four-quark condensates and the meson masses are studied in the scenario in which the resonance $f_{0}(600)$ is described as a predominantly tetraquark state. It is shown that the critical temperature is lowered and the transition softened. Interesting mixing effects between tetraquark, and quarkonium configurations take place.