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Reduced $\sigma$-meson mass and in-medium S-wave $\pi-\pi$ correlations

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 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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Submitted on : Thursday, January 6, 2000 - 4:20:50 PM
Last modification on : Thursday, November 19, 2020 - 12:58:26 PM

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Z. Aouissat, G. Chanfray, P. Schuck, J. Wambach. Reduced $\sigma$-meson mass and in-medium S-wave $\pi-\pi$ correlations. Physical Review C, American Physical Society, 2000, 61, pp.012202.1-012202.2. ⟨in2p3-00003757⟩



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