Holographic melting and related properties of mesons in a quark gluon plasma

TL;DR

This paper uses holographic models to study how mesons behave at finite temperature in a quark-gluon plasma, revealing their dissociation patterns, chiral symmetry restoration, and velocity limits for large-spin mesons.

Contribution

It provides a holographic analysis of meson melting, spin-dependent dissociation temperatures, and velocity constraints, extending understanding of meson properties in quark-gluon plasma.

Findings

Meson masses depend on temperature similarly to lattice results.

Higher-spin mesons dissociate at lower temperatures.

Large-spin mesons do not experience drag but have a maximum velocity.

Abstract

We analyse mesons at finite temperature in a chiral, confining string dual. The temperature dependence of low-spin as well as high-spin meson masses is shown to exhibit a pattern familiar from the lattice. Furthermore, we find the dissociation temperature of mesons as a function of their spin, showing that at a fixed quark mass, mesons with larger spins dissociate at lower temperatures. The Goldstone bosons associated with chiral symmetry breaking are shown to disappear above the chiral symmetry restoration temperature. Finally, we show that holographic consideration imply that large-spin mesons do not experience drag effects when moving through the quark gluon plasma. They do, however, have a maximum velocity for fixed spin, beyond which they dissociate.