https://doi.org/10.1140/epja/s10050-021-00532-6
Regular Article - Theoretical Physics
Delta baryons in neutron-star matter under strong magnetic fields
1
Department of Physics, Kent State University, 44243, Kent, OH, USA
2
Depto de Física, CFM, Universidade Federal de Santa Catarina, CP. 476, 88040-900, Florianopolis, SC, Brazil
Received:
17
March
2021
Accepted:
19
June
2021
Published online:
1
July
2021
In this work, we study magnetic field effects on neutron star matter containing the baryon octet and additional heavier spin 3/2 baryons (the 
’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 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 (
), 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 baryons in their interior.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
