At CERN, scientists working on the Large Hadron Collider (LHC) have made a significant discovery related to quantum entanglement. They observed a particularly strong entanglement between two Z bosons that originated from the decay of a Higgs boson. This finding is more robust than the entanglement previously observed between top quarks in 2024. The Z bosons involved in this study have three possible spin states, known as qutrits, making this the first measurement of entanglement involving elementary qutrit particles. The Higgs boson, which has no intrinsic spin and a total spin of zero, decays into two Z bosons. Because of the Higgs’s zero spin, the two Z bosons must share a common quantum state. However, producing two real Z bosons simultaneously from a Higgs boson with a mass of 125 GeV would require more energy than is available. As a result, one of the Z bosons must be a virtual particle. This raises an important question: can a virtual particle participate in quantum entanglement in the same way as a real particle? To study this, researchers analyzed the traces left by the particles resulting from the decay of the Z bosons. The Z boson has a mass of about 91 GeV and exists for only about 3 x 10^-25 seconds before decaying. Because of its extremely short lifespan, it is impossible to directly measure the spin of a Z boson. Instead, scientists infer its properties from the patterns of its decay products. This measurement marks a significant step into the largely unexplored territory of elementary qutrits. By studying these particles, researchers hope to gain deeper insights into the fundamental laws that govern the universe at its most basic level. The findings could contribute to a better understanding of quantum mechanics and the nature of particles that make up the fabric of reality.