Sigma meson mass and width at finite density

TL;DR

This paper investigates how the mass and width of the sigma meson change at finite baryonic density using a chiral unitary approach that accurately models meson interactions and resonances.

Contribution

It extends the chiral unitary approach to finite density, providing new insights into the behavior of the sigma meson in dense nuclear matter.

Findings

Sigma meson mass decreases with increasing density

Sigma meson width broadens at higher densities

Model reproduces vacuum meson phase shifts and resonances

Abstract

The sigma meson mass and width are studied at finite baryonic density in the framework of a chiral unitary approach which successfully reproduces the meson meson phase shifts and generates the f0 and sigma resonances in vacuum.