Top quark spin and quantum entanglement in the ATLAS experiment

Abstract

Top quark pair spin correlation measurements performed by the ATLAS experiment using $pp$ collisions at the CERN Large Hadron Collider are summarized. Moreover, the measurement of a specific observable $D$ related to top quark pair spin correlations is presented using the full LHC Run 2 data taking at the center-of-mass energy of $\sqrt{s}=13$ TeV. This allowed the ATLAS experiment to observe the quantum entanglement, one of the fundamental property of the quantum mechanics.

arXiv commentTalk at the 17th International Workshop on Top Quark Physics (Top2024), 22-27 September 2024

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