We present results of a self-consistent calculation for the kaon and antikaon spectral functions in cold nuclear matter, using as input the kaonnucleon 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 20MeV 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.
|Number of pages||8|
|Journal||Acta Physica Hungarica, Series A: Heavy Ion Physics|
|Publication status||Published - Apr 7 2005|
- Nuclear medium
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy(all)