  Quantum entanglement has long served as a foundational pillar in
understanding quantum mechanics, with a predominant focus on two-particle
systems. We extend the study of entanglement into the realm of three-body
decays, offering a more intricate understanding of quantum correlations. We
introduce a novel approach for three-particle systems by utilising the
principles of entanglement monotone concurrence and the monogamy property. Our
findings highlight the potential of studying deviations from the Standard Model
and emphasise its significance in particle phenomenology. This work paves the
way for new insights into particle physics through multi-particle quantum
entanglement, particularly in decays of heavy fermions and hadrons.
