The η-meson photoproduction cross sections have been measured on C and Cu targets for the photon energies between 600 and 1100 MeV to investigate the behavior of the S11 (1535) resonance in a nucleus. The excitation functions of the cross section as well as the angular and momentum distributions of η-mesons are in quantitative agreement with the Quantum Molecular Dynamics (QMD) model calculations in which the η-meson emission processes other than the S11 (1535) resonance are also incorporated. It is shown that the η production in the γ N → π η N reaction and the D15 (1675) resonance formation in the γ n → η n reaction play an important role for Eγ > 900 MeV.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2006 Aug 17|
ASJC Scopus subject areas
- Nuclear and High Energy Physics