The third peak structure in the double $J/\psi$ spectrum

PengYu Niu, Zhenyu Zhang, Qian Wang +1

Recently, the CMS and ATLAS collaborations have reported their $J/\psi J/\psi$ and $J/\psi {\psi }^{\prime }$ invariant mass distributions, respectively, for searching for fully charmed tetraquarks. B…