Signatures of toponium formation in LHC run 2 data

We study reported deviations between observations and theoretical predictions associated with the production of a pair dileptonically decaying top quarks at LHC, we examine possibility that they reflect signal toponium formation. investigate by gluon fusion color-singlet spin-0 ${\ensuremath{\eta}}_{t}$ bound state antitop quark, then decays ($gg\ensuremath{\rightarrow}{\ensuremath{\eta}}_{t}\ensuremath{\rightarrow}\overline{\ensuremath{\ell}}\ensuremath{\ell}b\overline{b}\ensuremath{\nu}\overline{\ensuremath{\nu}}$). find strong correlations favoring dilepton systems featuring small angular separation in azimuth invariant mass. Although only contributes to 0.8% total top-quark pair-production cross section 13 TeV there is it can account for observed excesses narrow edges phase space. propose method discover formation ``reconstructing'' both its quark constituents channel.