2006/07/31 by P. Muehlich, V. Shklyar, Stefan Leupold +3 · 3 citations
Physics and Astronomy · #Amplitude #Condensed matter physics #High-Energy Particle Collisions Research #Meson #Nuclear density #Nuclear matter #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Resonance (particle physics) #Saturation (graph theory) #Scattering #Spectral function #Unitary state #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2006.10.037
published as Nucl.Phys.A780:187-205,2006 · 26 pages, 10 figures, added short discussion
arxiv created 2006/10/25 · openalex publication_date 2006/10/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate the spectral function of the omega meson in nuclear matter at zero temperature by means of the low-density theorem. The omega N forward scattering amplitude is calculated within a unitary coupled-channel effective Lagrangian model that has been applied successfully to the combined analysis of pion- and photon-induced reactions. While the peak of the omega spectral distribution is shifted only slightly, we find a considerable broadening of the omega meson due to resonance-hole excitations. For omega mesons at rest with respect to the surrounding nuclear medium, we find an additional width of about 60 MeV at saturation density.