Strangeness production in neutron star matter

TL;DR

This paper investigates the production and proportion of strange particles in neutron star matter using a dynamical model, revealing significant strangeness fractions at high densities and minimal impact from neutron-proton asymmetry.

Contribution

It introduces a dynamical model analysis of strangeness production in neutron star matter, highlighting the density-dependent fractions of strange baryons.

Findings

Strangeness fraction is small at twice saturation density.

Strange baryons can constitute 25-50% at five times saturation density.

Neutron-proton asymmetry has little effect on strangeness fraction.

Abstract

Based on a dynamical model on particle production, the production and fraction of exotic components in neutron star matter are analyzed. It is found that there exists a small fraction of strangeness in twice saturation density matter. For five times saturation density matter, the fraction of strange baryons can be as high as 25-50\%, depending on the equation of state used. The neutron-proton asymmetry of dense matter does not significantly impact the strangeness fraction in neutron star matter. This research provides new insights into the strange components in neutron stars.