Modelling top-quark decays in $t\bar{t}t\bar{t}$ production at the LHC

Manal Alsairafi, Nikolaos Dimitrakopoulos, Malgorzata Worek

We compare the fixed-order NLO QCD predictions for the $pp\to t\bar{t}t\bar{t}+X$ process in the $4\ell$ decay channel with the parton-shower based results obtained with the POWHEG…