Authors: Shuntaro Sakai Daisuke Jido
Publish Date: 2015/03/25
Volume: 234, Issue: 1-3, Pages: 71-76
Abstract
The η ′ mass reduction in the nuclear medium is expected owing to the degeneracy of the pseudoscalarsinglet and octet mesons in the restoration of the spontaneous chiral symmetry breaking In this study we investigate the η ′ N 2body interaction which is the fundamental interaction of the inmedium η ′ properties using the linear sigma model as a chiral effective model The η ′ N interaction in the linear sigma model comes from the scalar meson exchange with U A 1 symmetry effect and is found to be fairly strong attraction The transition amplitude of η ′ N to the η N channel is relatively small compared to that of elastic channel From the analysis of the η ′ N 2body system we find a η ′ N bound state with the binding energy 12333iMeV We expect that this strongly attractive two body interaction leads to a deep and attractive optical potential
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