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arXiv · 1512.02395

Nuclear symmetry energy in a modified quark meson coupling model

R. N. Mishra·H. S. Sahoo·P. K. Panda·N. Barik·T. Frederico
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Abstract

We study nuclear symmetry energy and the thermodynamic instabilities of asymmetric nuclear matter in a self-consistent manner by using a modified quark-meson coupling model where the confining interaction for quarks inside a nucleon is represented by a phenomenologically averaged potential in an equally mixed scalar-vector harmonic form. The nucleon-nucleon interaction in nuclear matter is then realized by introducing additional quark couplings to $σ$, $ω$, and $ρ$ mesons through mean-field approximations. We find an analytic expression for the symmetry energy ${\cal E}_{sym}$ as a function of its slope $L$. Our result establishes a linear correlation between $L$ and ${\cal E}_{sym}$. We also analyze the constraint on neutron star radii in $(pn)$ matter with $β$ equilibrium.

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R. N. Mishra, H. S. Sahoo, P. K. Panda, N. Barik, T. Frederico. 2015-12-08. Nuclear symmetry energy in a modified quark meson coupling model. https://doi.org/10.1103/physrevc.92.045203

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