Study of $e^+e^-\toωX(3872)$ and $γX(3872)$ from 4.66 to 4.95 GeV
Creators: name: BESIII Collaboration
name: Ablikim, M.
name: Achasov, M. N.
name: Adlarson, P.
name: Afedulidis, O.
name: Ai, X. C.
name: Aliberti, R.
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name: Batozskaya, V.
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name: Berger, N.
name: Berlowski, M.
name: Bertani, M.
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name: Chelkov, G.
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name: Chen, Chao
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name: Chen, S. L.
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name: Chen, T.
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name: Cossio, F.
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name: de Boer, R. E.
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name: Deng, Z. Y.
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name: Destefanis, M.
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name: Dong, J.
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name: Dong, X.
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name: Duan, Y. Y.
name: Duan, Z. H.
name: Egorov, P.
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name: Feldbauer, F.
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name: Fu, Y. W.
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name: Gao, Yang
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name: Garzia, I.
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Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using data samples with an integrated luminosity of $4.5~\text{fb}^{-1}$ collected by the BESIII detector at center-of-mass energies ranging from 4.66 to 4.95 GeV, we study the processes of $e^+e^-\toωX(3872)$ and $e^+e^-\toγX(3872)$. With the $e^+e^-\toωX(3872)$ process, the branching fraction ratio $R\equiv\frac{\mathcal{B}(X(3872)\toγJ/ψ)}{\mathcal{B}(X(3872)\toπ^+π^- J/ψ)}$ is measured to be $0.38\pm0.20_\text{stat.}\pm0.01_\text{syst.}$ ($R&lt; 0.83$ at 90\% confidence level). In addition, we measure the ratio of the average cross section of $e^+e^-\toωX(3872)$ to $e^+e^-\toωχ_{c1}(ωχ_{c2})$ to be $σ_{ωX(3872)}/σ_{ωχ_{c1}}~(σ_{ωX(3872)}/σ_{ωχ_{c2}})=5.2\pm1.0_\text{stat.}\pm1.9_\text{syst.}~ (5.5\pm1.1_\text{stat.}\pm2.4_\text{syst.})$. Finally, we search for the process of $e^+e^-\toγX(3872)$, and no obvious signal is observed. The upper limit on the ratio of the average cross section of $e^+e^-\toγX(3872)$ to $e^+e^-\toωX(3872)$ is set as $σ_{γX(3872)}/σ_{ωX(3872)}&lt;0.23$ at 90\% confidence level.
description: 19 pages, 10 figures