Model of the Phase Transition Mimicking the Pasta Phase in Cold and Dense Quark-Hadron Matter

TL;DR

This paper develops a simple mixed phase model that mimics pasta phases in the quark-hadron transition and examines its impact on neutron star properties, aligning with observational data.

Contribution

It introduces a novel mixed phase model for the quark-hadron transition that reproduces pasta phases and applies it to neutron star structure analysis.

Findings

The model affects the mass-radius relation of neutron stars.

Results are consistent with observational constraints.

The model provides insights into the quark-hadron phase transition in dense matter.

Abstract

A simple mixed phase model mimicking so-called "pasta" phases in the quark-hadron phase transition is developed and applied to static neutron stars for the case of DD2 type hadonic and NJL type quark matter models. The influence of the mixed phase on the mass-radius relation of the compact stars is investigated. Model parameters are chosen such that the results are in agreement with the observational constraints for masses and radii of pulsars.