2004/04/30 by C. L. Korpa, M. F. M. Lutz, Matthias F. M. Lutz · 2 citations
Physics and Astronomy · #Amplitude #Condensed matter physics #Hadron #High-Energy Particle Collisions Research #Hyperon #Nuclear matter #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Saturation (graph theory) #Scattering #Scattering amplitude #Spectral function #nucl-th
paper · pdf · doi:10.1556/aph.22.2005.1-2.4
published as Acta Phys.Hung.A22:21-28,2005 · 8 pages, 4 figures, submitted to Heavy Ion Physics
openalex publication_date 2005/03/01 · arxiv created 2005/04/27 · arxiv updated 2010/12/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present results of a self-consistent calculation for the kaon and antikaon spectral functions in cold nuclear matter, using as input the kaon-nucleon and antikaon-nucleon scattering amplitudes of the vacuum. We investigate the effect of in-medium pion dressing on the antikaon-nucleon scattering amplitudes and antikaon spectral function. We find the influence of pion dressing to be minor on the antikaon spectral function and limited on the hyperon resonances causing only a small additional broadening. An exception is the Σ(1690). At nuclear saturation density an attractive mass shift of about 20 MeV and width of about 130 MeV is obtained. The kaon shows a repulsive mass increase of 36 MeV and a small width of the quasiparticle peak at saturation density.