Measurements of the inclusive and differential top-quark pair ( t t ¯ ) cross-sections in proton–proton collisions at s = 13 TeV , using 140 fb − 1 of data collected by the ATLAS experiment at the Large Hadron Collider, are presented. Events with an opposite-charge eμ pair and b -tagged jets are selected, and the inclusive cross-section measurement is used to determine the top-quark pole mass via the dependence of the predicted cross-section on m t pole . Complementary measurements of e μ b b ¯ production, treating both t t ¯ and tW events as signal, are also provided.
D. Hirschbühl (Sun,) studied this question.