Including the delta meson in relativistic mean-field models widens the allowed symmetry energy slope and curvature, changing low-mass neutron star radii while leaving maximum mass nearly fixed.
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Impact of the Scalar Isovector $\delta$-meson on the description of nuclear matter and neutron star properties
Including the delta meson in relativistic mean-field models widens the allowed symmetry energy slope and curvature, changing low-mass neutron star radii while leaving maximum mass nearly fixed.