Hadronic decay of exotic mesons consisting of four charm quarks

Hong-Fei Zhang, Xue-Mei Mo, Yu-Peng Yan

In 2020, a di-$J/\psi$ resonance centered at around 6.9 $\mathrm{GeV}$ was discovered by the LHCb Collaboration, and was later confirmed by the ATLAS and CMS Collaborations. In additi…