Peter Higgs was a British physicist known for his theoretical work on the Higgs boson and the mechanism that gives mass to subatomic particles. He was awarded the 2013 Nobel Prize in Physics for this work. The existence of the Higgs boson was experimentally confirmed in 2012 by the ATLAS and CMS collaborations at CERN.
Quantum decoherence is the physical process by which a quantum system loses its quantum behavior such as superposition and entanglement due to interactions with its surrounding environment.
It serves as the "bridge" between the quantum world of probabilities and the classical world of definite outcomes.