The masses of vector mesons in holographic QCD at finite chiral chemical potential

TL;DR

This paper investigates how topological charge fluctuations in heavy-ion collisions affect vector meson masses using holographic QCD models, revealing polarization-dependent mass shifts and stability constraints.

Contribution

It introduces a holographic framework to describe topological charge effects on vector mesons and proposes models capturing polarization-dependent mass modifications.

Findings

Different polarizations have distinct effective masses.

Stability constraints limit model choices.

The approach models topological charge effects in holographic QCD.

Abstract

Central heavy-ion collisions may induce sizeable fluctuations of the topological charge. This effect is expected to distort the dispersion relation for the hadron masses. We construct a general setup for a compact description of this phenomenon in the framework of bottom-up holographic approach to QCD. A couple of soft wall holographic models are proposed for the vector mesons. The states having different circular polarizations are shown to have different effective mass. The requirement of stability imposes strong constraints on the possible choice of models.