Quantum tops at the LHC: from entanglement to Bell inequalities
- URL: http://arxiv.org/abs/2110.10112v2
- Date: Fri, 25 Mar 2022 21:02:28 GMT
- Title: Quantum tops at the LHC: from entanglement to Bell inequalities
- Authors: Claudio Severi, Cristian Degli Esposti Boschi, Fabio Maltoni and
Maximiliano Sioli
- Abstract summary: We introduce a unique set of observables suitable for both measurements, and then perform the corresponding analyses.
We find that entanglement can be established at better than 5$sigma$ both at threshold as well as at high $p_T$ already in the LHC Run 2 dataset.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We present the prospects of detecting quantum entanglement and the violation
of Bell inequalities in $t\bar{t}$ events at the LHC. We introduce a unique set
of observables suitable for both measurements, and then perform the
corresponding analyses using simulated events in the dilepton final state,
reconstructing up to the unfolded level. We find that entanglement can be
established at better than 5$\sigma$ both at threshold as well as at high $p_T$
already in the LHC Run 2 dataset. On the other hand, only very high-$p_T$
events are sensitive to a violation of Bell inequalities, making it
significantly harder to observe experimentally. By employing a sensitive and
robust observable, two different unfolding methods and independent statistical
approaches, we conclude that, at variance with previous estimates, testing Bell
inequalities will be challenging even in the high luminosity LHC run.
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