Using (447.9 ± 2.3) million ψ(3686) events collected with the BESIII detector, the decays of χcJ → ϕϕ (J = 0, 1, 2) have been studied via the decay ψ(3686) → γχcJ. The branching fractions of the decays χcJ → ϕϕ (J = 0, 1, 2) are determined to be (8.59 ± 0.27 ± 0.20) × 10−4, (4.26 ± 0.13 ± 0.15) × 10−4, and (12.67 ± 0.28 ± 0.33) × 10−4, respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process ψ(3686) → γχcJ , χcJ → ϕϕ, ϕ → K + K −, the polarization parameters of the χcJ → ϕϕ decays are determined for the first time.
Helicity amplitude analysis of χcJ → ϕϕ
Garzia, I.;Scodeggio, M.;
2023
Abstract
Using (447.9 ± 2.3) million ψ(3686) events collected with the BESIII detector, the decays of χcJ → ϕϕ (J = 0, 1, 2) have been studied via the decay ψ(3686) → γχcJ. The branching fractions of the decays χcJ → ϕϕ (J = 0, 1, 2) are determined to be (8.59 ± 0.27 ± 0.20) × 10−4, (4.26 ± 0.13 ± 0.15) × 10−4, and (12.67 ± 0.28 ± 0.33) × 10−4, respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process ψ(3686) → γχcJ , χcJ → ϕϕ, ϕ → K + K −, the polarization parameters of the χcJ → ϕϕ decays are determined for the first time.File in questo prodotto:
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