https://doi.org/10.1051/epjconf/202431206004
New Structures in the J/ψ J/ψ Mass Spectrum at CMS
1 Department of Physics, Tsinghua University, Haidian District, Beijing, China
2 School of Physics and Technology, Nanjing Normal University, Wenyuan Road No. 1, Nanjing, China
* e-mail: xining.wang@cern.ch
** e-mail: yik@fnal.gov
Published online: 20 November 2024
A search is reported for structures near the J/ψ J/ψ mass threshold using a dataset of proton-proton collisions at √s = 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of about 135 fb−1. Two structures are observed with a significance exceeding 5σ and evidence of an additional structure is reported with a local significance of 4.7σ.
© The Authors, published by EDP Sciences, 2024
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