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

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.

The manuscript is being withdrawn by the author because, after further evaluation and referee feedback, its scientific scope and novelty were found to be too limited in its present form. The work requires substantial reformulation before it can provide a sufficiently clear and relevant contribution to the field