Search for supersymmetry in pp collisions at $\sqrt{s}=13~\mathrm{TeV}$ with $137~\mathrm{fb}^{-1}$ in the final state with a single lepton using the sum of masses of large-radius jets

Results are reported from a search for new physics beyond the standard model in proton-proton collisions in the final state with a single lepton; multiple jets, including at least one jet tagged as originating from the hadronization of a bottom quark; and large missing transverse momentum. The search uses a sample of proton-proton collision data at $\sqrt{s}=13~\mathrm{TeV}$, corresponding to $137~\mathrm{fb}^{-1}$, recorded by the CMS experiment at the LHC. The signal region is divided into bins characterized by the total number of jets, the number of bottom-quark jets, the missing transverse momentum, and the sum of masses of large-radius jets. The observed event yields in the signal regions are consistent with estimates of standard model backgrounds based on event yields in control regions. The results are interpreted in the context of simplified models of supersymmetry involving gluino pair production in which each gluino decays into a top anti-top quark pair and a stable, unobserved neutralino, which generates missing transverse momentum in the event. Scenarios with gluino masses up to about 2150 GeV are excluded at $95\%$ confidence level for neutralino masses up to 700 GeV, and the highest excluded neutralino mass is about 1250 GeV.