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Updated: Oct 14, 2025

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Testing Bell Inequalities at the LHC with Top-Quark Pairs
M Fabbrichesi1, R Floreanini1, G Panizzo2
1INFN, Sezione di Trieste, Via Valerio 2, 34127 Trieste, Italy.
Abstract:
Correlations between the spins of top-quark pairs produced at a collider can be used to probe quantum entanglement at energies never explored so far. We show how the measurement of a single observable can provide a test of the violation of a Bell inequality at the 98% C.L. with the statistical uncertainty of the data already collected at the Large Hadron Collider, and at the 99.99% C.L. with the higher luminosity of the next run. Detector acceptance, efficiency, and migration effects are taken into account. The test relies on the spin correlations alone and does not require the determination of probabilities-in contrast to all other tests of Bell inequalities.
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