Effect of tensor force on density dependence of symmetry energy within the BHF Framework

TL;DR

This paper investigates how the tensor force influences the density dependence of nuclear symmetry energy using the Brueckner-Hartree-Fock approach, highlighting the dominant role of tensor interactions from meson exchanges.

Contribution

It demonstrates that the tensor force, especially from $ ho$-meson exchange, significantly affects the symmetry energy's density dependence within a microscopic framework.

Findings

Tensor force affects symmetry energy via the $^3SD_1$ channel.

Increasing $ ho$-meson tensor strength reduces symmetry energy.

Tensor force from meson exchanges dominates the density dependence.

Abstract

The effect of tensor force on the density dependence of nuclear symmetry energy has been investigated within the framework of the Brueckner-Hartree-Fock approach. It is shown that the tensor force manifests its effect via the tensor $^3SD_1$ channel. The density dependence of symmetry energy $E_{sym}$ turns out to be determined essentially by the tensor force from the $\pi$ meson and $\rho$ meson exchanges via the $^3SD_1$ coupled channel. Increasing the strength of the tensor component due to the $\rho$-meson exchange tends to enhance the repulsion of the equation of state of symmetric nuclear matter and leads to reduction of symmetry energy. The present results confirm the dominant role played by the tensor force in determining nuclear symmetry energy and its density dependence within the microscopic BHF framework.