1998/10/15 by V. L. Eletsky, V.L. Eletsky, J. I. Kapusta +1 · 2 citations
Physics and Astronomy · #Amplitude #Dispersion relation #High-Energy Particle Collisions Research #Meson #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Resonance (particle physics) #Scattering #Scattering amplitude #Vector meson dominance #nucl-th
paper · pdf · doi:10.1103/physrevc.59.2757
published as Phys. Rev. C 59, 2757 (1999) · 7 pages, 5 figures
arxiv created 1998/10/15 · openalex publication_date 1999/05/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The \ensuremathρ meson mass shift, width broadening, and spectral density at finite temperature and nucleon density are estimated using a general formula which relates the self-energy to the real and imaginary parts of the forward scattering amplitude on the constituents of the medium. We saturate the scattering amplitude at low energies with resonances, while at high energies a Regge approach is taken in combination with vector meson dominance; experimental data is used wherever possible. The main result is that the \ensuremathρ meson becomes increasingly broad with increasing nucleon density. The spectral density is suppressed in the resonance region 600<M<900MeV and enhanced in the subresonance region M<600MeV.