Abstract
We predict a narrow resonance structure (Γ≃10 MeV) in the excitaton function of (,) double-charge-exchange reactions at a pion kinetic energy of ∼419 MeV. This structure is due to the interference between the usual →→ double-charge-exchange amplitudes, which have a smooth energy dependence, and a resonant →→ high-energy double-charge-exchange amplitude associated with the formation of a strongly bound η-nucleus system. The latter process leads to a novel feature of the pion-nucleus interaction, the mesonic compound nucleus resonance.
- Received 9 April 1987
DOI:https://doi.org/10.1103/PhysRevC.36.1636
©1987 American Physical Society