Helicity amplitude analysis of χ cJ → ϕϕ

Journal article

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.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Albrecht, M; Aliberti, R

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2023
• Issue: 5
• Article number: 69
• Publication date: 2023-05-09
• Acceptance date: 2023-04-11
• DOI: 10.1007/jhep05(2023)069
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: e+-e− Experiments