Investigation of the reaction π‑p → η'π0n at the VES spectrometer

Results obtained by investigating the reaction π^‑p → η'π⁰n at the VES spectrometer (Institute for High Energy Physics, Protvino) are presented. The effective-mass spectrum and angular distributions of η'π⁰ events are compared with their counterparts for ηπ⁰ and η'π^‑ events selected from the same data sample. The ratio R of the branching fractions for the decays of a₂⁰(1320) mesons into η'π and ηπ is measured. The result is R=0.047±0.018, which agrees with the value measured previously for a₂^‑. An investigation of P-wave production in the η'π⁰ and ηπ⁰ systems over the effective-mass interval 1.45–1.9 GeV/c2 leads to the conclusion that the coupling of the exotic object π₁ (1600) to the ρπ channel is suppressed in relation to its coupling to the η'π or the b₁(1235)π channel.