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\bibitem{ATLASCollaborationAad_etal2023} ATLAS Collaboration(Aad, G. et al), Amos, K. R., Aparisi Pozo, J. A., Bailey, A. J., Bouchhar, N., Cabrera Urban, S., et al. (2023). Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the ATLAS Detector. \textit{Phys. Rev. Lett.}, \textit{131}(15), 151902--22pp.

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