https://doi.org/10.1140/epjp/s13360-025-06145-y
Regular Article
Effects of 
and 
-meson on properties of hyperon stars including 
resonance
1
Xingzhi College, Zhejiang Normal University, 321004, Jinhua, Zhejiang, China
2
College of Science, University of Shanghai for Science and Technology, 200093, Shanghai, China
Received:
31
October
2024
Accepted:
17
February
2025
Published online:
4
March
2025
In this work, we research the properties of neutron stars using the nonlinear relativistic mean-field theory and consider multiple degrees of freedom inside neutron stars, including hyperons and resonances. We investigate different coupling parameters 
between resonances and nucleons and compare the differences between neutron stars with and without strange mesons 
and These effects include particle number distributions, equations of state (EOS), mass–radius relations, and tidal deformabilities. To overcome the “hyperon puzzle,” we employ the 
scheme to obtain neutron stars with masses up to 
. We find that strange mesons appear at around 3
and reduce the critical density of baryons in the high-density region. With increasing coupling parameter , the resonances suppress hyperons, leading to a shift of the critical density toward lower values. The early occurrence of resonances may play a crucial role in the stability of neutron stars. Strange mesons soften the EOS slightly, while resonances predominantly soften the EOS in the low-density region. By calculating tidal deformabilities and comparing with astronomical event GW170817, we find that the inclusion of resonances decreases the radius of neutron stars.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
