Ablikim, M.Achasov, M.N.Adlarson, P.Çetin, Serkant AliKolcu, Onur BuğraUman, Igor2025-04-182025-04-182025Ablikim, M., Achasov, M. N., Adlarson, P., Afedulidis, O., Ai, X. C., Aliberti, R., ... & Huang, L. Q. (2025). Measurement of the Born cross section for e+ e-→ η hc at center-of-mass energies between 4.1 and 4.6 GeV. Physical Review D, 111(1), L011101.24700010http://dx.doi.org/10.1103/PhysRevD.111.L011101https://hdl.handle.net/20.500.12713/7169We measure the Born cross section for the reaction e+e-→ηhc from s=4.129 to 4.600 GeV using datasets collected by the BESIII detector running at the BEPCII collider. A resonant structure in the cross-section line shape near 4.200 GeV is observed with a statistical significance of 7σ. The parameters of this resonance are measured to be M=4188.8±4.7±8.0 MeV/c2 and Γ=49±16±19 MeV, where the first uncertainties are statistical and the second systematic. © 2025 authors. Published by the American Physical Society.eninfo:eu-repo/semantics/openAccessArticle11112-s2.0-8521721802010.1103/PhysRevD.111.L011101Q1