Ablikim, M.Achasov, M. N.Adlarson, P.Albrecht, M.Aliberti, R.Amoroso, A.Çetin, Serkant Ali2024-05-192024-05-1920231029-8479https://doi.org10.1007/JHEP05(2023)069https://hdl.handle.net/20.500.12713/5050Using (447.9 +/- 2.3) million (3686) events collected with the BESIII detector, the decays of chi(cJ) -> phi phi (J = 0, 1, 2) have been studied via the decay psi(3686) ->gamma chi(cJ). The branching fractions of the decays chi(cJ) -> phi phi (J = 0, 1, 2) are determined to be (8.59 +/- 0.27 +/- 0.20) x 10(-4), (4.26 +/- 0.13 +/- 0.15) x 10(-4), and (12.67 +/- 0.28 +/- 0. 33) x 10(-4), respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process psi(3686) -> gamma chi(cJ), chi(cJ) -> phi phi, phi -> K+K-, the polarization parameters of the chi(cJ) -> phi phi decays are determined for the first time.eninfo:eu-repo/semantics/openAccessE(+)-E(-) ExperimentsArticle5WOS:0009927283000012-s2.0-85159612198N/A10.1007/JHEP05(2023)069Q2