Astrophysics (Index)About

quantum mixing

(particle mixing)
(means by which one particle spontaneously changes to another)

Quantum mixing (or particle mixing) is a quantum-mechanical phenomena in which one elementary particle changes into another, in a weak interaction. I suspect it is considered different than decaying if the changes form a loop, i.e., eventually, it returns back to the same particle, and has no (or minimal) interaction with its surroundings, a type of oscillation. Quarks are considered to undergo this phenomena (CKM mixing). A mixing of leptons is behind neutrino oscillation (the Mikheyev-Smirnov-Wolfenstein effect is a phenomenon that modifies this oscillation, which applies to energetic solar neutrinos). In supersymmetric models, neutralinos are the result of quantum mixing, in this case, treating the resulting "loop" as a single type of particle.

(physics,particles,quantum mechanics)
Further reading:

Referenced by pages:
Mikheyev-Smirnov-Wolfenstein effect (MSW effect)
neutrino oscillation
supersymmetry (SUSY)