Dropping Sigma-Meson Mass and In-Medium S-Wave pion-pion Correlations

Details Dropping Sigma-Meson Mass and In-Medium S-Wave pion-pion Correlations Dropping Sigma-Meson Mass and In-Medium S-Wave pion-pion Correlations

1999-08-26

arxiv.org/abs/nucl-th/9908076v2

Physics

Nuclear Physics

Nuclear Theory

Short note submitted to PRC, 3 pages, 2 Postscript figures, using revtex. (correction to author's address)

Scientific paper

10.1103/PhysRevC.61.012202

The influence of a dropping sigma-meson mass on previously calculated in-medium pion-pion correlations in the J=I=0 (sigma-meson) channel is investigated. It is found that the invariant-mass distribution around the vacuum threshold experiences a further strong enhancement with respect to standard many-body effects. The relevance of this result for the explanation of recent $A(\pi,2\pi)X$ data is pointed out.

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