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Top quark spin and quantum entanglement in the ATLAS experiment

Roman Lysak, on behalf of the ATLAS collaboration

SciPost Phys. Proc. 18, 016 (2026) · published 29 January 2026

Proceedings event

The 17th International Workshop on Top Quark Physics

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.


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Large Hadron Collider (LHC) Standard Model Top quark

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