http://arxiv.org/abs/1703.08743
Within a modified Gogny-Hartree-Fock (GHF) energy density functional (EDF) encapsulating the nucleon-nucleon short-range correlations (SRC)-induced high momentum tail (HMT) in the single-nucleon momentum distribution, we investigate effects of the SRC-induced HMT on the density dependence of nuclear symmetry energy $E_{\rm{sym}}(\rho)$. After re-optimizing the modified GHF-EDF by reproducing the same empirical properties of symmetric nuclear matter (SNM), symmetry energy $E_{\rm{sym}}(\rho_0)$ and its slope $L$ as well as major features of nucleon optical potential at saturation density $\rho_0$, the \esym is found to decrease at both sub-saturation and supra-saturation densities, leading to a reduced curvature $K_{\rm{sym}}$ of \esym and subsequently a smaller coefficient $K_{\tau}$ for the isospin-dependence of nuclear incompressibility in better agreement with its experimental value. Astrophysical implications of the SRC-modified symmetry energy are also discussed. In particular, the SRC effects are found to decrease the proton fraction as well as the core-crust transition density and pressure in neutron stars at $\beta$ equilibrium. Moreover, the SRC-modified EOS and single-nucleon potentials can be used in future transport model simulations of heavy-ion collisions to investigate SRC effects in dense neutron-rich matter in terrestrial laboratories.
B. Cai and B. Li
Tue, 28 Mar 17
60/68
Comments: 7 pages including 2 figures
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