Improbability of DUrca process constraints EOS

TL;DR

This paper discusses how recent observational and experimental evidence challenges the inclusion of the DUrca process in neutron star cooling models, offering a new method to test the neutron star equation of state.

Contribution

It proposes that the exclusion of the DUrca process can serve as an independent test for the neutron star EOS based on recent data.

Findings

DUrca process likely excluded from neutron star cooling

Soft EOSs like FPS may be ruled out

Provides a new testing method for the EOS

Abstract

According to recent observational and theoretical progresses, the DUrca process (direct Urca process) may be excluded from the category of neutron star cooling mechanisms. This result combined with the latest nuclear symmetry energy experiments, will provide us an independent way of testing the EOS (equation of state) for supranormal density. For example, soft EOSs such as FPS will probably be excluded.