Revisiting η'(958) nuclear states

2025/07/08 by Friedman, E., Gal, A.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2507.05832

Abstract

Observing η'-nuclear quasibound states requires that the η'-nuclear potential is both sufficiently attractive and weakly absorptive, as confirmed by the CBELSA/TAPS collaboration analysis of inclusive η' production experiments on nuclear targets, including liquid hydrogen (LH₂). Here we present an alternative derivation of the η'-nuclear potential, constrained by near-threshold pp→ ppη' and γp→η' p production experiments on a free proton. The resulting η'-nuclear potential is weakly attractive and strongly absorptive, to the extent that observation of clear signals of η'-nuclear quasibound states is unlikely. Possible exceptions resulting from the dynamics of the nearby I=(1)/(2) J=((1)/(2))^- nucleon resonance N^∗(1895) are briefly discussed.

Citations

• Compatibility of recent Ξ-nuclear bound state signals
• Meson-nucleus potentials and the search for meson-nucleus bound states

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