Heavy baryons in hot stellar matter with light nuclei and hypernuclei

TL;DR

This paper investigates how light nuclei, hypernuclei, hyperons, and Δ-baryons behave in hot stellar matter, revealing their interactions influence cluster stability and abundance in environments like supernovae.

Contribution

It introduces a relativistic mean-field model to study the coexistence of heavy baryons with light nuclei and hypernuclei in stellar matter, highlighting the effects of hyperons and Δ-baryons on cluster dissolution.

Findings

Hyperons and Δ-baryons delay cluster dissolution to higher densities.

Presence of hyperons and Δ-baryons increases cluster abundance.

Effects are more pronounced at lower charge fractions and higher temperatures.

Abstract

The production of light nuclei and hypernuclei together with heavy baryons, both hyperons and $\Delta$-baryons, in low density matter as found in stellar environments such as supernova or binary mergers is studied within relativistic mean-field models. Five light nuclei were considered together with three light hypernuclei. The presence of both hyperons and $\Delta$-baryons shift the dissolution of clusters to larger densities and increase the abundance of clusters. This effect is larger the smaller the charge fraction and the higher the temperature. The couplings of the $\Delta$-baryons were chosen imposing that the nucleon effective mass remains finite inside neutron stars.