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Testing Bell inequalities and entanglement with di-boson final states
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abstract
We explore the phenomenology of quantum entanglement at collider experiments by computing the polarization density matrix of processes yielding two massive gauge bosons. After reviewing the formalism, we detail observables suitable to test the presence of entanglement and quantum correlations in the di-boson system. The implied violation of Bell inequalities can be observed with future data at the LHC in the decays of the Higgs boson to $Z$ boson pairs.
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Cited by 1 Pith paper
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Looking into the quantum entanglement in $H\to ZZ^\star$ at LHC within SMEFT framework
Using symmetrized angular asymmetries from simulated H->ZZ*->4l events, the authors reconstruct the ZZ* density matrix and report a positive concurrence lower bound for all scanned SMEFT couplings.
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