Measurements of the branching fractions of ${χ}_{cJ}→ϕϕη,\text{ }ϕϕ{η}^{′}$ and $ϕ{K}^{+}{K}^{−}η$

Author(s): M. Ablikim et al. (BESIII Collaboration)Using a sample of (2712.4±14.3)×106 ψ(3686) events collected by the BESIII detector at the BEPCII collider, we measure the branching fractions of the decays χcJ→ϕϕη,ϕϕη′, and ϕK+K−η (J=0, 1, 2). The obtained branching fractions are B(χc0→ϕϕη)=(7.40±0.23±0.55)×10−4, B(χc1→ϕϕη)=(3.33±0.14±0.25)×10−4,…[Phys. Rev. D 113, 092018] Published Fri May 29, 2026