arXiv:nucl-th/0002031·v1·Nuclear Theory
Dropping Sigma-Meson Mass and In-Medium Pion-Pion Correlations
P. SchucK (Institut des Sciences Nucleaires, Grenoble, France)🇫🇷 · Z. Aouissat (IKP, Technische Universitat, Darmstadt, Germany)🇩🇪 · G. Chanfray (Institut de Physique Nucleaire, Lyon, France)🇫🇷 · J. Wambach (IKP, Technische Universitat, Darmstadt, Germany)🇩🇪
Abstract
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 over and above the standard many-body effects. The relevance of this result for the theoretical interpretation of this result for the theoretical interpretation of recent A(pi-2 pi)X data is pointed out.
Comments: 7 pages, 2 Postscript figures, contribution to the `International Workshop XXVIII on Gross Properties of Nuclei and Nuclear Excitations', Hirschegg, Austria, January 16-22 2000