Hyperon-meson and delta-meson coupling to protoneutron stars structure using the nonlinear Walecka model

37th Brazilian Meeting on Nuclear Physics

Souto, W.A.^1 ; Oliveira, J.C.T.^2 ; Rodrigues, H.^3 ; Duarte, S.B.^4 ; Chiapparini, M.^5

Govemo Do Estado de Roraima, Secretaria de Segurança Pública, Instituto de Criminalistica, Rua José Pinheiro 952, Roraima

69.300-000, Brazil^1

Departamento de Física, Universidade Federal de Roraima, Campus do Paricarana s/n, Roraima

69310-270, Brazil^2

Centro Federal de Educação Tecnológica Do Rio de Janeiro, Av. Maracanã 229, Rio de Janeiro, RJ

20271-110, Brazil^3

Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, Rio de Janeiro, RJ

22290-180, Brazil^4

Instituto de Física, Universidade Do Estado Do Rio de Janeiro, Rua São Francisco Xavier 524, Rio de Janeiro, RJ

20550-900, Brazil^5

关键词: Coupling constants;    Equation of state;    Neutron stars;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/630/1/012031/pdf
DOI  :  10.1088/1742-6596/630/1/012031

来源: IOP

【 摘 要 】

In this work we determine the equation of state and the population of baryons and leptons and discuss the effects of the hyperon-meson coupling constants to the formation of delta resonances in the stellar medium. We also discuss the structure of the protoneutron stars including the delta matter in their composition, and compared the results of a cooled neutron star, after escape of neutrinos. For protoneutron stars structure and composition, the neutrinos are considered trapped.