Ablikim, M.Achasov, M. N.Adlarson, P.Ai, X. C.Aliberti, R.Amoroso, A.Çetin, Serkant Ali2024-05-192024-05-1920232470-00102470-0029https://doi.org10.1103/PhysRevD.108.112014https://hdl.handle.net/20.500.12713/5836Using a sample of (27.12 +/- 0.14) x 108 psi(3686) events collected with the BESIII detector, the decay psi(3686) -> A over bar A eta' with eta' subsequently decaying into gamma pi+pi- and eta pi+pi- is observed for the first time. The branching fraction of psi(3686) -> A over bar A eta' is measured to be (7.34 +/- 0.94(stat) +/- 0.43(sys)) x 10-6. No resonant structures are evident in the A eta', over bar A eta' and AA over bar mass spectra.eninfo:eu-repo/semantics/openAccessE(+)E(-)TofArticle10811WOS:0011849704000122-s2.0-85182146448N/A10.1103/PhysRevD.108.112014Q1