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Delta baryons in neutron-star matter under strong magnetic fields

Dexheimer, Veronica ; Marquez, Kauan D. ; Menezes, Débora P.

The European physical journal. A, Hadrons and nuclei, 2021-07, Vol.57 (7), Article 216 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Delta baryons in neutron-star matter under strong magnetic fields
Autor: Dexheimer, Veronica ; Marquez, Kauan D. ; Menezes, Débora P.
Assuntos: Baryons ; Hadrons ; Heavy Ions ; Hyperons ; Magnetic fields ; Mesons ; Neutron stars ; Neutrons ; Nuclear Fusion ; Nuclear Physics ; Particle and Nuclear Physics ; Physics ; Physics and Astronomy ; Quarks ; Regular Article - Theoretical Physics ; Relativistic effects ; The QCD Phase Diagram in Strong Magnetic Fields
É parte de: The European physical journal. A, Hadrons and nuclei, 2021-07, Vol.57 (7), Article 216
Descrição: In this work, we study magnetic field effects on neutron star matter containing the baryon octet and additional heavier spin 3/2 baryons (the Δ ’s). We make use of two different relativistic hadronic models that contain an additional vector-isovector self interaction for the mesons: one version of a relativistic mean field (RMF) model and the chiral mean field (CMF) model. We find that both the additional interaction and a strong magnetic field enhance the Δ baryon population in dense matter, while decreasing the relative density of hyperons. At the same time that the vector-isovector meson interaction modifies neutron-star masses very little ( < 0.1 M Sun ), it decreases their radii considerably, allowing both models to be in better agreement with observations. Together, these features indicate that magnetic neutron stars are likely to contain Δ baryons in their interior.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Delta baryons in neutron-star matter under strong magnetic fields

Dexheimer, Veronica ; Marquez, Kauan D. ; Menezes, Débora P.

Berlin/Heidelberg: Springer Berlin Heidelberg

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