MEDIUM EFFECTS ON CHARGED PION RATIO IN HEAVY ION COLLISIONS
MEDIUM EFFECTS ON CHARGED PION RATIO IN HEAVY ION COLLISIONS
We have recently studied in the delta-resonance–nucleon-hole model the dependence of the pion spectral function in hot dense asymmetric nuclear matter on the charge of the pion due to the pion p-wave interaction in nuclear medium. In a thermal model, this isospin-dependent effect enhances the ratio of negatively charged to …