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28 March 2024
 
  » arxiv » nucl-th/0002032

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In-medium Pion-Pion Interaction and Chiral Symmetry Restoration
D. Davesne ; Y.J. Zhang ; G.Chanfray ; J. Wambach ;
Date 11 Feb 2000
Subject nucl-th
AffiliationInstitut de Physique Nucleaire, Lyon, France), Y.J. Zhang (Joint Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai, China), G.Chanfray (Institut de Physique Nucleaire, Lyon, France), J. Wambach (I
AbstractWe 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.
Source arXiv, nucl-th/0002032
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