HL-LHC prospects for the measurement of the Standard Model four-top-quark production cross-section

This note presents projections for the measurement of the Standard Model four-top-quark production cross-section in the context of the High-Luminosity LHC with 3000 $fb^{-1}$ of proton-proton collisions at $\sqrt{s} $= 14 TeV with the ATLAS experiment. The final states considered contain two same-charge leptons or at least three leptons. A precision of 11% on the four-top-quark production cross-section is expected to be achieved.