Properties of the $ω$ Meson at Finite Temperature and Density

Details Properties of the $ω$ Meson at Finite Temperature and Density Properties of the $ω$ Meson at Finite Temperature and Density

2004-04-20

arxiv.org/abs/nucl-th/0404057v1

Phys.Rev. C69 (2004) 065206

Physics

Nuclear Physics

Nuclear Theory

5 pages revtex4, 3 figure

Scientific paper

10.1103/PhysRevC.69.065206

The mass shift, width broadening, and spectral density for the $\omega$ meson in a heat bath of nucleons and pions is calculated using a general formula which relates the self-energy to the forward scattering amplitude. We use experimental data to saturate the scattering amplitude at low energies with resonances and include a background Pomeron term, while at high energies a Regge parameterization is used. The peak of the spectral density is little shifted from its vacuum position, but the width is considerably increased due to collisional broadening. At normal nuclear matter density and a temperature of 150 MeV the spectral density of the $\omega$ meson has a width of 140 MeV. Zero temperature nuclear matter is also discussed.

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