@article{aad2023observationf,
  author = {Aad, G. and Abbott, B. and Abeling, K. and Abidi, S. H. and Ali, B. and Augsten, K. and Bergmann, B. and Billoud, T. and Day-Hall, H. and Hub{\'a}{\v{c}}ek, Z. and Ja{\v{c}}ka, P. and Mondal, S. and My{\v{s}}ka, M. and Novotn{\'y}, L. and Petousis, V. and Polifka, R. and Posp{\'i}{\v{s}}il, S. and Smolek, K. and Sopczak, A. and Vacek, V. and Vok{\'a}{\v{c}}, P. and Zaplat{\'i}lek, O. and others},
  title = {Observation of an Excess of Dicharmonium Events in the Four-Muon Final State with the {ATLAS} Detector},
  journal = {Physical Review Letters},
  publisher = {American Physical Society (APS)},
  volume = {131},
  number = {15},
  pages = {151902},
  year = {2023},
  doi = {10.1103/PhysRevLett.131.151902},
  issn = {0031-9007}
}