TY - JOUR AU - Atlas Collaboration PY - 2023 UR - https://hdl.handle.net/10481/85677 AB - This paper presents the observation of four-topquark (t ¯tt ¯t) production in proton-proton collisions at the LHC. The analysis is performed using an integrated luminosity of 140 fb−1 at a centre-of-mass energy of 13 TeVcollected using the ATLAS... LA - eng PB - Springer Nature TI - Observation of four-top-quark production in the multilepton final state with the ATLAS detector DO - 10.1140/epjc/s10052-023-11573-0 ER -