Medium Modification of The Pion-Pion Interaction at Finite Density
arXiv:nucl-th/9909032 · doi:10.1103/PhysRevC.62.024604
Abstract
We discuss medium modifications of the unitarized pion-pion interaction in the nuclear medium. We incorporate both the effects of chiral symmetry restoration and the influence of collective nuclear pionic modes originating from the p-wave coupling of the pion to delta-hole configurations. We show in particular that the dropping of the sigma meson mass significantly enhances the low energy structure created by the in-medium collective pionic modes.
26 pages, 7 figures included, Latex file