2004/04/20 by A. T. Martell, P.J. Ellis, P. J. Ellis · 23 citations
Physics and Astronomy · #Amplitude #Atomic physics #High-Energy Particle Collisions Research #Meson #Nuclear matter #Nuclear physics #Nucleon #Omega #Parametrization (atmospheric modeling) #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scattering #Spectral line #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.69.065206
published in Physical Review C 69(6) (American Institute of Physics) · 5 pages revtex4, 3 figure
arxiv created 2004/04/20 · openalex publication_date 2004/06/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The mass shift, width broadening, and spectral density for the \ensuremathω 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 parametrization 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\phantom\rule0.3em0exMeV the spectral density of the \ensuremathω meson has a width of 140\phantom\rule0.3em0exMeV. Zero temperature nuclear matter is also discussed.