Isoscalar-isovector interferences in πN↦Ne+e- reactions as a probe of baryon resonance dynamics

Abstract:The isoscalar-isovector (ρ-ω) interferences in the exclusive reactions π-p↦ne+e- and π+n↦pe+e- near the ω threshold leads to a distinct difference of the dielectron invariant-mass distributions depending on beam energy. The strength of this effect is determined by the coupling of resonances to the nucleon vector-meson channels and other resonance properties. Therefore, a combined analysis of these reactions can be used as a tool for determining the baryon resonance dynamics.