At CERN's Large Hadron Collider, physicists have found strong evidence that Z bosons—short-lived, heavy particles—can become quantum entangled when produced in the decay of Higgs bosons. This is one of the most extreme environments yet for testing the nonlocal correlations Einstein famously dismissed as "spooky action at a distance."
The detection relies on the entangled spins of the Z bosons, which are measured indirectly through their decay products. Because these particles exist only fleetingly, the measurement pushes quantum entanglement tests into a new regime of mass and energy.
The finding is reported as strong evidence rather than a formal discovery, but it suggests that entanglement holds even under the violent conditions of particle collisions at the LHC. This article is based on a single source, so there are no conflicting findings to compare.