CERN Accelerating science

ATLAS Note
Report number	ATL-PHYS-PROC-2025-001
Title	Top quark spin and quantum entanglement in the ATLAS experiment
Author(s)	Lysak, Roman (Czech Academy of Sciences (CZ))
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2025
Imprint	07 Jan 2025
Number of pages	6
In:	17th International Workshop on Top Quark Physics, Saint Malo, France, 22 - 27 Sep 2024
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	top quark pair production, ttbar spin correlations, quantum entanglement ; TOP
Abstract	Top quark pair spin correlation measurements performed by the ATLAS experiment using pp collisions at the LHC collider at CERN 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.

Corresponding record in: Inspire