Amplitude analysis of ψ 3686 → γ K S 0 K S 0

Journal article

Using (2712 ± 14) × 106ψ(3686) events collected with the BESIII detector, we perform the first amplitude analysis of the radiative decay ψ3686→γKS0KS0 within the mass region MKS0KS0<2.8 GeV/c2. Employing a one-channel K-matrix approach for the description of the dynamics of the KS0KS0 system, the data sample is well described with four poles for the f0-wave and three poles for the f2-wave. The determined pole positions are consistent with those of well-established resonance states. The observed f0 and f2 states are found to be in agreement with those produced in radiative J/ψ decays. The production behaviors of f0 and f2 poles in ψ3686→γKS0KS0 are qualified with their residues and the converted branching fractions. By comparing with J/ψ→γKS0KS0 decay, the ratios Bψ3686→γf0, 2BJ/ψ→γf0, 2 are determined, which provides crucial experimental inputs on the internal structure of the f0, 2 states, especially their potential mixing with glueball components.

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

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2025
• Issue: 10
• Article number: 81
• Publication date: 2025-10-09
• Acceptance date: 2025-07-16
• DOI: 10.1007/jhep10(2025)081
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: Spectroscopy; e+-e− Experiments; Particle and Resonance Production; Quarkonium