Prospects for observing the ${\eta }_t$ $\to$ $W^{+}{W}^{-}$ decay at the HL-LHC

Yueling Yang, Bingbing Yang, Junfeng Sun

Motivated by the recent observation of the pseudoscalar toponium ${\eta }_t$ at the LHC and by the ongoing interest in its properties, we phenomenologically investigate the ${\eta }_t$ ${\…