Formation of η′(958) Bound States in Nuclei

Abstract

We calculate theoretically the formation spectra of η (958)-nucleus systems in the (p, d) reaction for the investigation of in-medium modification of the η properties. We show the numerical results of the formation spectra on three target nuclei 12 C, 16 O and 40 Ca with various strength of the η -nucleus interaction. We conclude that one finds evidence of a possible attractive interaction between η and the nucleus in the spectrum as a peak structure around the production threshold in light nuclei such as carbon. Spectroscopy of the (p, d) reaction is expected to be performed experimentally at GSI in near future.