Nuclear bound state of eta'(958) and partial restoration of chiral symmetry in the eta' mass

Details Nuclear bound state of eta'(958) and partial restoration of chiral symmetry in the eta' mass Nuclear bound state of eta'(958) and partial restoration of chiral symmetry in the eta' mass

2011-09-02

arxiv.org/abs/1109.0394v2

Phys. Rev. C85, 032201 (R), 2012

Physics

Nuclear Physics

Nuclear Theory

5 pages, 2 figures, accepted version

Scientific paper

10.1103/PhysRevC.85.032201

The in-medium mass of the $\eta^{\prime}$ meson is discussed in a context of partial restoration of chiral symmetry in nuclear medium. The $\eta^{\prime}$ mass is expected to be reduced by order of 100 MeV at the saturation density. The reduction is a consequence of the suppression of the anomaly effect on the $\eta^{\prime}$ mass induced by partial restoration of chiral symmetry. This strong attraction in $\eta^{\prime}$ nuclear systems does not accompany large absorption of $\eta^{\prime}$ into nuclear matter. This leads to the possibility of so narrow bound states of the $\eta^{\prime}$ meson in nuclei to be seen in hadronic reactions with light nuclear targets.

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