Radiative corrections to ee̅ →ψππ and ee̅ →ρππ

Abstract

We calculate the radiative corrections to ee̅ →ψ′→ψππ, and predict that the ratio of the rate for ee̅ →ψ′→ψππ⁺π^- to that for ee̅ →ψ′→ψπ⁰π⁰ should be about 1.86. We show that the asymmetry in the π⁺π^- distribution for ee̅ →ρ⁰π⁺π^- is quite large, about 15%, but it goes through zero for the π⁺π invariant mass near mρ. On the other hand, for ee̅ →ψ′→ψπ⁺π^-, the asymmetry is negligibly small, less than 1%.