Kaon properties in (proto)neutron stars
Amruta Mishra, Arvind Kumar, Sambuddha Sanyal, V. Dexheimer, Stefan, Schramm
TL;DR
This paper investigates how kaon and antikaon properties are modified within (proto-)neutron star interiors using a chiral SU(3) model, considering hyperons, temperature, and neutrino effects to understand potential antikaon condensation.
Contribution
It introduces a comprehensive study of kaon/antikaon medium modifications in (proto-)neutron stars, incorporating hyperons and various thermodynamic conditions within a chiral SU(3) framework.
Findings
Hyperons significantly affect kaon and antikaon optical potentials.
Antikaon condensation is possible under certain conditions in neutron star matter.
Medium modifications depend on temperature, neutrino content, and hyperon presence.
Abstract
The modification on kaon and antikaon properties of in the interior of (proto-)neutron stars is investigated using a chiral SU(3) model. The parameters of the model are fitted to nuclear matter saturation properties, baryon octet vacuum masses, hyperon optical potentials and low energy a kaon-nucleon scattering lengths. We study the kaon/antikaon medium modification and explore the possibility of antikaon condensation in (proto-)neutron star matter at zero as well as finite temperature/entropy and neutrino content. The effect of hyperons on kaon and antikaon optical potentials is also investigated at different stages of the neutron star evolution.
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