The ηd Interaction Studied in γd→π0ηd |
| T. Ishikawa
Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan |
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| We have studied the interaction between the eta meson and deuteron (ηd interaction) from measurement of cross-sections for coherent neutral-pion and eta-meson photoproduction on the deuteron (γd→π0ηd) using the photon beam at the Research Center for Electron Photon Science (ELPH), Tohoku University, Japan. We have found a narrow resonance-like peak in the ηd subsystem in the vicinity of the threshold, suggesting strong ηd attraction. The sharp backward-peaking angular dependence of deuteron emission, predicted by the existing theoretical calculations, does not appear. We discuss a possible production mechanism of the γd→π0ηd reaction and the possibility of using coherent π0 and η photoproduction on a nucleus to study the η-nuclear interaction. |
DOI:10.12693/APhysPolA.146.687 topics: ηd interaction, dibaryonic resonance, coherent meson photoproduction |