Meson Thermalization by Baryon Injection in D4/D6 Model

TL;DR

This paper investigates how baryon injection and magnetic fields influence meson thermalization in a strongly coupled quark-gluon plasma using holographic duality, revealing that higher energy scales and magnetic fields delay thermalization.

Contribution

It introduces a holographic model for meson thermalization considering baryon injection and magnetic fields, highlighting their effects on thermalization time.

Findings

Higher energy scales prolong thermalization time.

Magnetic fields make mesons more stable and delay thermalization.

Baryon injection induces horizon formation on flavor branes.

Abstract

We study meson thermalization in a strongly coupled plasma of quarks and gluons using AdS/CFT duality technique. Four dimensional large-Nc QCD is considered as a theory governing this quark-gluon plasma (QGP) and D4/D6- brane model is chosen to be its holographic dual theory. In order to investigate meson thermalization, we consider a time-dependent change of baryon number chemical potential. Thermalization in gauge theory side corresponds to horizon formation on the probe flavor brane in the gravity side. The gravitational dual theory is compactified on a circle that the inverse of its radius is proportional to energy scale of dual gauge theory. It is seen that increase of this energy scale results in thermalization time dilation. In addition we study the effect of magnetic field on meson thermalization. It will be seen that magnetic field also prolongs thermalization process by making mesons more stable.