DOE OSTI · 3004778
Amplitude analysis of ψ3686→γKS0KS0
Abstract
Using (2712 ± 14) × 106ψ(3686) events collected with the BESIII detector, we perform the first amplitude analysis of the radiative decay ψ3686→γKS0KS0$$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$ within the mass region MKS0KS0<2.8$$ {M}_{K_S^0{K}_S^0}<2.8 $$ GeV/c2. Employing a one-channel K-matrix approach for the description of the dynamics of the KS0KS0$$ {K}_S^0{K}_S^0 $$ 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$$ \psi (3686)\to \gamma {K}_S^0{K}_S^0 $$ are qualified with their residues and the converted branching fractions. By comparing with J/ψ→γKS0KS0$$ J/\psi \to \gamma {K}_S^0{K}_S^0 $$ decay, the ratios Bψ3686→γf0,2BJ/ψ→γf0,2$$ \frac{\mathcal{B}\left(\psi (3686)\to \gamma {f}_{0,2}\right)}{\mathcal{B}\left(J/\psi \to \gamma {f}_{0,2}\right)} $$ are determined, which provides crucial experimental inputs on the internal structure of the f0,2 states, especially their potential mixing with glueball components.
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Ablikim, M, Achasov, M N, Adlarson, P, Ai, X C, Aliberti, R, Amoroso, A, An, Q, Bai, Y, Bakina, O, Ban, Y, Bao, H-R, Batozskaya, V, Begzsuren, K, Berger, N, Berlowski, M, Bertani, M, Bettoni, D, Bianchi, F, Bianco, E, Bortone, A, Boyko, I, Briere, R A, Brueggemann, A, Cai, H, Cai, M H, Cai, X, Calcaterra, A, Cao, G F, Cao, N, Cetin, S A, Chai, X Y, Chang, J F, Che, G R, Che, Y Z, Chelkov, G, Chen, C H, Chen, Chao, Chen, G, Chen, H S, Chen, H Y, Chen, M L, Chen, S J, Chen, S L, Chen, S M, Chen, T, Chen, X R, Chen, X T, Chen, X Y, Chen, Y B, Chen, Y Q, Chen, Z J, Chen, Z K, Choi, S K, Chu, X, Cibinetto, G, Cossio, F, Cottee-Meldrum, J, Cui, J J, Dai, H L, Dai, J P, Dbeyssi, A, de Boer, R E, Dedovich, D, Deng, C Q, Deng, Z Y, Denig, A, Denysenko, I, Destefanis, M, De Mori, F, Ding, B, Ding, X X, Ding, Y, Ding, Y X, Dong, J, Dong, L Y, Dong, M Y, Dong, X, Du, M C, Du, S X, Duan, Y Y, Duan, Z H, Egorov, P, Fan, G F, Fan, J J, Fan, Y H, Fang, J, Fang, S S, Fang, W X, Fang, Y Q, Farinelli, R, Fava, L, Feldbauer, F, Felici, G, Feng, C Q, Feng, J H, Feng, L, Feng, Q X, Feng, Y T, Fritsch, M, Fu, C D. 2025-10-01. Amplitude analysis of ψ3686→γKS0KS0. https://doi.org/10.1007/jhep10(2025)081
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