A nuclear matter model based on chiral-scale effective theory with a dilatonic meson reproduces saturation properties and yields a stiff high-density equation of state with neutron star masses near 2.8 to 3 solar masses.
Nuclear symmetry energy at subnormal densities from measured nuclear masses
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The symmetry energy coefficients for nuclei with mass number A=20~250 are extracted from more than 2000 measured nuclear masses. With the semi-empirical connection between the symmetry energy coefficients of finite nuclei and the nuclear symmetry energy at reference densities, we investigate the density dependence of symmetry energy of nuclear matter at subnormal densities. The obtained results are compared with those extracted from other methods.
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Nuclear matter properties from chiral-scale effective theory including a dilatonic scalar meson
A nuclear matter model based on chiral-scale effective theory with a dilatonic meson reproduces saturation properties and yields a stiff high-density equation of state with neutron star masses near 2.8 to 3 solar masses.