From $\chi$EFT to Multi-Region Modeling: Neutron star structure with a polytropic extension of $\chi$EFT and MUSES Calculation Engine multi-layer modeling

TL;DR

This paper compares two neutron star modeling approaches—Chiral Effective Field Theory and the MUSES Calculation Engine—analyzing their mass-radius predictions to evaluate their effectiveness in dense nuclear matter research.

Contribution

It introduces a comparative analysis of Chiral EFT and multi-region MUSES modeling for neutron star structure, highlighting their respective strengths and limitations.

Findings

Different mass-radius relations from the two methods

Advantages of multi-region modeling in dense matter

Limitations of Chiral EFT at high densities

Abstract

Neutron stars provide a unique environment to probe the properties of dense nuclear matter. In this work, we present a comparative study between two approaches to modeling the neutron star structure: a Chiral Effective Field Theory based approach and the MUSES Calculation Engine framework, which uses three different approaches for the three density regions. We analyze the resulting mass-radius relations, discussing the respective advantages and limitations of the two methods.