Study of in-Medium omega-Meson Properties in Ap and pA Collisions

摘要

The possibility to investigate the in-medium properties of the vector omega mesons at normal nuclear density is considered. The folding model and simulations with the RQMD generator have been used for studying of the omega-resonance production in Ap and pA reactions and its omega -> pi(0)gamma -> 3 gamma decay. We show that measurements in the inverse Ap kinematics is an effective way to get information about the omega-meson mass modification especially in not yet explored range of small meson momenta relative to the projectile nuclei where the strength of the effect is expected to be most strong. The traditional pA kinematics appears to be more preferable for the investigation of the in-medium omega-meson width. Using of compact electromagnetic calorimeter provides the possibility to collect large statistics and study the momentum dependencies of both the omega-meson mass and width at the density of normal nuclei.