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Title: Light hyperclusters and hyperons in low-density hot stellar matter
Authors: Custódio, Tiago
Pais, Helena 
Providência, Constança 
Keywords: Nuclear Theory; astro-ph.HE
Issue Date: 23-Jun-2021
Publisher: American Physical Society
Project: POCI-01-0145-FEDER-029912 
Serial title, monograph or event: Physical Review C
Volume: 104
Issue: 3
Abstract: The abundance of light nuclei and hyperons, that are produced in stellar environments such as supernova or binary mergers, is calculated within a relativistic mean-field model with density dependent couplings in low-density matter. Five light nuclei are considered, together with three light hyper-nuclei. We show that the presence of hyperons shifts the dissolution of clusters to larger densities, and increases the amount of clusters. This effect is larger the smaller the charge fraction, and the higher the temperature. The abundance of hyperons is also affected by the cluster formation: neutral and positively charged hyperons suffer a reduction, and the negatively charged ones an increase. We also observe that the dissolution of the less-abundant clusters occurs at larger densities due to smaller Pauli-blocking effects. Overall, hyper-nuclei set in at temperatures above 25 MeV, and depending on the temperature and chemical composition, they may be more abundant than $\alpha$-particles, or even more abundant than other heavier clusters.
Description: 12 pages, 8 figures
ISSN: 2469-9985
Rights: openAccess
Appears in Collections:I&D CFis - Artigos em Revistas Internacionais

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