2013/09/30 by Luiz L. Lopes, Débora P. Menezes, Debora P. Menezes · 4 citations
Physics and Astronomy · #Group (periodic table) #Nuclear physics #Nuclear physics research studies #Particle physics #Physics #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Symmetry (geometry) #Theoretical physics #astro-ph.HE #nucl-th
paper · pdf · doi:10.1103/physrevc.89.025805
published as Phys. Rev. C 89, 025805 (2014) · REVtex, 16 pages, 10 figures. v4
arxiv created 2013/11/16 · openalex publication_date 2014/02/19 · arxiv updated 2014/02/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using the well-known quantum hadrodynamics, we study the effects of meson-hyperon coupling constants on the onset of hyperons in dense nuclear matter. We use the SU(3) symmetry group to fix all these coupling constants, constrained to experimental nuclear matter results and astrophysical observations. While the discovery of massive pulsars PSR J1614-2230 and PSR J0348+0432 points towards a very stiff equation of state at very large densities, results from heavy-ion collisions point in the opposite direction for densities below 5 times the nuclear saturation density. We study some well-known parametrizations and see that most of them cannot satisfy both types of constraints. Indeed, although in our model we can simulate a 2.25 M_\ensuremath\bigodot hyperonic neutron star, the heavy-ion collision constraints limit the maximum mass around 2.06 M_\ensuremath\bigodot.