Exotic multi-quark states and baryon spectroscopy workshop

Coherent neutral-pion and eta-meson photoproduction on the deuteron studied at ELPH

27 Jun 2024, 10:30

1h

Wolfgang Paul Hörsaal (Universitätsclub Bonn, the University of Bonn)

Speaker

Takatsugu Ishikawa (Research Center for Nuclear Physics (RCNP), Osaka University)

Description

We have studied the interaction between the eta meson and deuteron from measurement of cross sections for coherent neutral-pion and eta-meson photoproduction on the deuteron. We have found a narrow resonance-like bump in the eta-deuteron subsystem at the vicinity of the threshold, suggesting strong eta-deuteron attraction. The sharp backward-peaking angular dependence of deuteron emission, predicted by the existing theoretical calculations, does not appear. We discuss the possibilities of using coherent neutral-pion and eta-meson photoproduction on a nucleus to study the eta-nuclear interaction.

References:
Phys. Rev. C 104, L052201 (2021); Phys. Rev. C 105, 045201 (2022).

Presentation materials

ishikawa20240627f.pdf