Holographically emulating sequential versus instantaneous disappearance of vector mesons in a hot environment

TL;DR

This paper uses holographic models to simulate how vector mesons disappear at high temperatures, mimicking the deconfinement transition in QCD, and explores different disappearance scenarios influenced by thermodynamic properties.

Contribution

It introduces extended soft-wall holographic models to study sequential and instantaneous meson disappearance at finite temperature, highlighting the impact of the blackness function.

Findings

Models can emulate deconfinement at QCD-like temperatures.

Different disappearance scenarios are achievable within the model.

The blackness function critically influences meson behavior at high temperatures.

Abstract

Descent extensions of the soft-wall model are used to accommodate two variants of Regge trajectories of vector meson excitations. At non-zero temperatures, various options for either sequential or instantaneous disappearance of vector mesons as normalisable modes are found, thus emulating deconfinement at a certain temperature in the order of the (pseudo-) critical temperature of QCD. The crucial role of the blackness function, which steers the thermodynamic properties of the considered system, is highlighted.