May 26 – 28, 2025
Universidad de Alcalá
Europe/Madrid timezone

Moat hyperons in cold neutron stars

May 28, 2025, 4:10 PM
20m
Universidad de Alcalá

Universidad de Alcalá

Colegio de San Ildefonso, Plaza de San Diego, s/n, 28801 Alcalá de Henares, Madrid.

Speaker

Hristijan Kochankovski (Univ. Barcelona)

Description

We investigate the hyperonic equation of state (EoS) within the non-linear derivative model that incorporates a momentum dependence on the interactions, with a special emphasis on properly establishing the conditions for hyperon appearance in neutron star matter. We demonstrate that hyperons can appear at finite momentum, forming a so-called “moat” region, even when they are
absent at zero momentum. Our study shows that this phenomenon significantly alters the composition and EoS of hyperonic matter as compared to the cases when it is not taken into account, highlighting the importance of treating the momentum dependence of
the baryon fields in dense matter appropriately.

Primary authors

Hristijan Kochankovski (Univ. Barcelona) Angels Ramos (University of Barcelona)

Presentation materials