New structures in the J/$\ddot{I}ˆ$J/$\ddot{I}ˆ$ mass spectrum in proton-proton collisions at $\sqrt{s}$ = 13 TeV

CMS Collaboration

A search is reported for near-threshold structures in the J/$\ddot{I}ˆ$J/$\ddot{I}ˆ$ invariant mass spectrum produced in proton-proton collisions at $\sqrt{s}$ = 13 TeV from data collected by th…