Rho Meson spectral function in hot asymmetric nuclear matter

TL;DR

This paper investigates how the spectral function of rho mesons changes in hot, dense, and asymmetric nuclear matter, revealing mode splitting and the effects of tensor coupling within an effective chiral SU(3) model.

Contribution

It provides a detailed analysis of rho meson spectral functions considering density, temperature, and asymmetry effects using an effective chiral SU(3) framework.

Findings

Clear splitting of longitudinal and transverse modes observed.

Spectral functions depend on density, temperature, and asymmetry.

Role of tensor coupling significantly influences spectral features.

Abstract

The rho meson spectral function in hot and dense asymmetric nuclear matter (number densities of proton and neutron different) is evaluated in an effective chiral SU(3) model within the mean field approximation (MFA). The dependence of the vector meson masses on density and temperature, their variation with the asymmetry parameter, the form of the spectral function when the p <-> n symmetry is broken are studied. One can observe clear splitting of the longitudinal and the transverse modes among the rho isospin multiplets. The role of a running tensor coupling on the spectral function is also studied.