Kaon and antikaon properties in cold nuclear medium

Abstract

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.

8 pages, 4 figures, submitted to Heavy Ion Physics

References in corpus (6)

• Relativistic chiral SU(3) symmetry, large N_c sum rules and meson-baryon scattering
• The antikaon nuclear potential in hot and dense matter
• Self consistent propagation of hyperons and antikaons in nuclear matter based on relativistic chiral SU(3) dynamics
• Migdal's short range correlations in a covariant model
• Self consistent and covariant propagation of pions, nucleon and isobar resonances in cold nuclear matter
• Self-consistent antikaon dynamics in isospin-asymmetric nuclear medium

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