M. Aaboud, G. Aad, B. Abbott, D. C. Abbott, B. Ali, K. Augsten, B. Bergmann, P. Gallus, M. Havránek, Z. Hubáček et al.: Measurements of top-quark pair spin correlations in the e mu channel at √s=13 TeV using pp collisions in the ATLAS detector. The European Physical Journal C 80(8), 754 (2020). doi:10.1140/epjc/s10052-020-8181-6