On the possibility of rho-meson condensation in neutron stars

TL;DR

This paper investigates the potential for rho meson condensation in neutron star cores, emphasizing the influence of strong magnetic fields and in-medium effects on the condensation process.

Contribution

It introduces the possibility of rho meson condensation in neutron stars considering in-medium mass reduction and magnetic field effects, which was not thoroughly explored before.

Findings

Rho meson condensates can form in neutron star cores under certain conditions.

Strong magnetic fields can facilitate rho meson condensation.

In-medium effects reduce rho meson mass, promoting condensation.

Abstract

The possibility of meson condensation in stars and in heavy-ion collisions has been discussed in the past. Here, we study whether rho meson condensation ($\rho^{-}$) can occur in very dense matter and determine the effect of strong magnetic fields on this condensation. We find that rho meson condensates can appear in the core of the neutron star assuming a rho mass which is reduced due to in-medium effects. We find that the magnetic field has a non-negligible effect in triggering condensation.