Entanglement between the spins of top-quark pairs produced at a collider can be used to test a (generalized) Bell inequality at energies never explored so far. We show how the measurement of a single observable can provide a test of the violation of the Bell inequality at the 98% CL with the data already collected at the Large Hadron Collider and at the 99.99% CL with the higher luminosity of the next run.
@article{arxiv.2102.11883,
title = {Testing Bell inequalities at the LHC with top-quark pairs},
author = {M. Fabbrichesi and R. Floreanini and G. Panizzo},
journal= {arXiv preprint arXiv:2102.11883},
year = {2021}
}