Utilize este identificador para referenciar este registo: https://hdl.handle.net/10316/95926
Título: Light hyperclusters and hyperons in low-density hot stellar matter
Autor: Custódio, Tiago
Pais, Helena 
Providência, Constança 
Palavras-chave: Nuclear Theory; astro-ph.HE
Data: 23-Jun-2021
Editora: American Physical Society
Projeto: POCI-01-0145-FEDER-029912 
UID/FIS/04564/2020 
Título da revista, periódico, livro ou evento: Physical Review C
Volume: 104
Número: 3
Resumo: 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.
Descrição: 12 pages, 8 figures
URI: https://hdl.handle.net/10316/95926
ISSN: 2469-9985
2469-9993
DOI: http://arxiv.org/abs/2106.12245v1
http://arxiv.org/abs/2106.12245v1
10.1103/PhysRevC.104.035801
http://arxiv.org/abs/2106.12245v1
Direitos: openAccess
Aparece nas coleções:I&D CFis - Artigos em Revistas Internacionais

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