G. Aad, B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, K. Augsten, P. Gallus, J. Guenther, J. Jakůbek, Z. Kohout et al.: Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at root s=8 TeV Using the ATLAS Detector. Physical Review Letters 114(14), 142001 (2015). doi:10.1103/PhysRevLett.114.142001