In-medium Pion-Pion Interaction and Chiral Symmetry Restoration

Details In-medium Pion-Pion Interaction and Chiral Symmetry Restoration In-medium Pion-Pion Interaction and Chiral Symmetry Restoration

2000-02-11

arxiv.org/abs/nucl-th/0002032v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 3 Postscript figures, contribution to the `International Workshop XXVIII on Gross Properties of Nuclei and Nuclear Ex

Scientific paper

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 how the resulting strong enhancement of the sigma-meson spectral function is related to large fluctuations of the condensate associated with the partial restoration of chiral symmetry.

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