Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu ^- \bar{t}\mu ^+$ in multi-lepton final states in pp collisions at $\sqrt{s} = 13\,\textrm{TeV}$ with the ATLAS detector
ATLAS Collaboration, Georges Aad, A. C. Abusleme Hoffman, Ayana Tamu Arce et autres