Evidence of entangled Z bosons reportedly found in Higgs boson decays

A post says researchers with CERN’s ATLAS experiment used Large Hadron Collider data to study Higgs bosons decaying into pairs of Z bosons. By examining leptons produced as the Z bosons themselves decayed, they reconstructed information about the Z bosons’ spins. The post describes the result as strong evidence of quantum entanglement—connected quantum states—with the non-entangled hypothesis disfavored at 4.7 standard deviations.