Ablikim M.MIN-ZU WANGet.al.2025-01-132025-01-132022-12-27https://scholars.lib.ntu.edu.tw/handle/123456789/724784Using data samples with an integrated luminosity of 19 fb−1 at twenty-eight center-of-mass energies from 3.872 GeV to 4.700 GeV collected with the BESIII detector at the BEPCII electron-positron collider, the process e+e− → ηπ+π− and the intermediate process e+e− → ηρ0 are studied for the first time. The Born cross sections are measured. No significant resonance structure is observed in the cross section lineshape. [Figure not available: see fulltext.].Charm Physicse+-e− Experiments[SDGs]SDG7journal article10.1007/JHEP12(2022)153