G. Aad, E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, M. Aboelela, A. Aboulhorma, H Abramowicz, Y. Abulaiti, B. S. Acharya, A. Ackermann, C. Adam Bourdarios, L. Adamczyk, S. V. Addepalli, M. J. Addison, J. Adelman, A. Adiguzel, T. Adye, A. A. Affolder, Y. Afik, M. N. Agaras, A. Aggarwal, C. Agheorghiesei, F. Ahmadov, S. Ahuja, S. Ahuja, X. Ai, G. Aielli, A. Aikot, M. Ait Tamlihat, B. Aitbenchikh, T. P. A. Åkesson, A. V. Akimov, D. Akiyama, N. N. Akolkar, S. Aktas, G. L. Alberghi, J. Albert, U. Alberti, P. Albicocco, G. L. Albouy, S. Alderweireldt, Z. L. Alegria, M. Aleksa, I. N. Aleksandrov, C. Alexa, T. Alexopoulos, F. Alfonsi, M. Algren, M. Alhroob, B. Ali, H. M. J. Ali, S. Ali, S. W. Alibocus, M. Aliev, G. Alimonti, W. Alkakhi, C. Allaire, B. M. M. Allbrooke, D. R. Allen, J. S. Allen, J. F. Allen, P. P. Allport, A ALOISIO, F. Alonso, C. Alpigiani, Z. M. K. Alsolami, A. Alvarez Fernandez, M. Alves Cardoso, M ALVIGGI, M. Aly, Y A Coutinho, A. Ambler, C. Amelung, M. Amerl, C. G. Ames, T. Amezza, D. Amidei, B. Amini, K. Amirie, A. Amirkhanov, S. P. Amor Dos Santos, K. R. Amos, D. Amperiadou, S. An, C. Anastopoulos, T. Andeen, J. K. Anders, A. C. Anderson, A. Andreazza, S. Angelidakis, A. Angerami, A. V. Anisenkov, A. Annovi, C. Antel, E. Antipov, M. Antonelli, F. Anulli
Abstract The inclusive top quark pair ( $$t\bar{t}$$ t t ¯ ) cross-section $$\sigma _{t\bar{t}}$$ σ t t ¯ has been measured in proton–proton collisions at $$\sqrt{s}=13\,\text {TeV}$$ s = 13 TeV , using $$140\,{\text {fb}^{-1}} $$ 140 fb - 1 of data collected by the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge $$e\mu $$ e μ pair and b -tagged jets, the cross-section is measured to be: $$\begin{aligned} \sigma _{t\bar{t}} & = 829.3\pm 1.3\,\mathrm {(stat)}\ \pm 8.0\,\mathrm {(syst)}\ \pm 7.3\,\mathrm {(lumi)}\ \\ & \quad \pm 1.9\,\mathrm {(beam)}\,\textrm{pb}, \end{aligned}$$ σ t t ¯ = 829.3 ± 1.3 ( stat ) ± 8.0 ( syst ) ± 7.3 ( lumi ) ± 1.9 ( beam ) pb , where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the proton beam energy, giving a total uncertainty of 1.3%. The result is used to determine the top quark pole mass via the dependence of the predicted cross-section on $${m_{t}^\textrm{pole}}$$ m t pole , giving