Ablikim, M.Achasov, M.N.Adlarson, P.Ahmed, S.Albrecht, M.Aliberti, R.Amoroso, A.An, M.R.An, Q.Bai, X.H.Bai, Y.Bakina, O.Çetin, Serkant AliKolcu, Onur Buğra2022-05-232022-05-232022Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., . . . (BESIII Collaboration). (2022). Partial wave analysis of J/ψ →γη η. Physical Review D, 105(7) doi:10.1103/PhysRevD.105.0720022470-0010https://doi.org/10.1103/PhysRevD.105.072002https://hdl.handle.net/20.500.12713/2709Using a sample of (10.09±0.04)×109 J/? events collected with the BESIII detector, a partial wave analysis of J/???? ? is performed. The masses and widths of the observed resonances and their branching fractions are reported. The main contribution is from J/???f0(2020) with f0(2020)?? ? , which is found with a significance of greater than 25?. The product branching fraction B(J/???f0(2020)) B(f0(2020)?? ? ) is measured to be (2.63±0.06(stat.)+0.31-0.46(syst.))×10-4. © 2022 American Physical Society. All rights reserved.eninfo:eu-repo/semantics/openAccessArticle1057WOS:0008106128000022-s2.0-85129457100Q110.1103/PhysRevD.105.072002Q1