Magnetized color superconducting quark matter under compact star conditions: Phase structure within the SU(2)f NJL model

TL;DR

This paper investigates the phase structure of magnetized color superconducting quark matter in compact stars using an SU(2)f NJL model, analyzing how magnetic fields, chemical potential, and neutrality conditions affect phases.

Contribution

It extends previous zero-field studies by analyzing the phase diagram under magnetic fields with realistic stellar conditions using a magnetic field independent regularization scheme.

Findings

Magnetic fields modify the phase structure of quark matter.

Neutrality conditions significantly influence phase boundaries.

The model confirms known phases and reveals new features under stellar conditions.

Abstract

The properties of magnetized color superconducting cold dense quark matter under compact star conditions are investigated using a $SU(2)_f$ Nambu Jona-Lasinio (NJL)-type model in which the divergences are treated using a magnetic field independent regularization scheme in order to avoid unphysical oscillations. We study the phase diagram for several model parametrizations. The features of each phase are analyzed through the behavior of the chiral and superconducting condensates together with the different particle densities for increasing chemical potential or magnetic field. While confirming previous results derived for the zero magnetic field or isospin symmetric matter case, we show how the phases are modified in the presence of $\beta$-equilibrium as well as color and electric charge neutrality conditions.