Helicity amplitude analysis of ${\chi }_{cJ}\to \varphi \varphi$

BESIII Collaboration, M. Ablikim, M. N. Achasov +567

Using (447.9 $\pm$ 2.3) million $\psi$(3686) events collected with the BESIII detector, the decays of ${\chi }_{cJ}\to \varphi \varphi$ ($J$=0, 1, 2) have been studied via the decay $ψ(3686)\ri…