In baryon- and neutron-rich matter the isospin symmetry energy drops substantially once a small fraction of antinucleons is included, with intrinsically larger isospin splitting for antinucleon potentials than for nucleon potentials.
Constraints on the density dependence of the symmetry energy from heavy ion collisions
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abstract
Constraints on the Equation of State for symmetric matter (equal neutron and proton numbers) have been extracted from energetic collisions of heavy ions over a range of energies. Collisions of neutron-deficient and neutron-rich heavy ions now provide initial constraints on the EoS of neutron-rich matter at sub-saturation densities from isospin diffusions and neutron proton ratios. This article reviews the experimental constraints on the density dependence of Symmetry Energy at sub-saturation density.
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Symmetry energy of baryon- and neutron-rich nuclear matter
In baryon- and neutron-rich matter the isospin symmetry energy drops substantially once a small fraction of antinucleons is included, with intrinsically larger isospin splitting for antinucleon potentials than for nucleon potentials.