A closer look at post-decay t t entanglement

2024/01/19 by Aguilar-Saavedra, J. A.
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2401.10988

Abstract

Top pair production is ideally suited to observe post-decay entanglement, thus providing a novel test of quantum mechanics. We provide top polarised decay amplitudes that can be used to compute semi-analytical predictions and, in particular, to better understand \em why the post-decay entanglement arises. We obtain predictions for the LHC, identifying general phase space regions where experimental measurements of tW entanglement are feasible. We also give predictions for polarised e⁺ e^- collisions, focusing on the possibility that the post-decay tW entanglement is larger than the t t one.

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