Φ meson transparency in nuclei from ΦN resonant interactions

摘要

We investigate the Φ meson nuclear transparency using some recent theoretical developments on the Φ in medium self-energy. The inclusion of direct resonant ΦN scattering and the kaon decay mechanisms leads to a Φ width much larger than in most previous theoretical approaches. The model has been confronted with photoproduction data from CLAS and LEPS and the recent proton induced Φ production from COSY finding an overall good agreement. The results support the need of a quite large direct ΦN-scattering contribution to the self-energy.