Measurement of the $e^+e^- \to π^+π^-π^0η$ cross section below $\sqrt{s}=2$ GeV

Abstract

The process $e^+e^- \to π^+π^-π^0η$ is studied in the center-of-mass energy region below 2 GeV with the SND detector at the VEPP-2000 $e^+e^-$ collider. The four intermediate states contribute to this process: $ωη$, $ϕη$, $a_0(980)ρ$, and a structureless $π^+π^-π^0η$ state. We measure the total $e^+e^- \to π^+π^-π^0η$ cross section and the cross sections for its components: $ωη$, $ϕη$, and a sum of $a_0(980)ρ$ and the structureless state. Our results are in agreement with previous measurements and have comparable or better accuracies.

17 pages, 11 figures, 3 tables. arXiv admin note: text overlap with arXiv:1607.00371