- #1
- 2,810
- 605
Consider a composite particle. Its spin is determined by the spins of its constituent particles. But the constituent particles are in a superposition of different spin states and so don't have a definite spin. So it seems it shouldn't be possible to ascribe a definite spin to the composite particle. I know, one particular state may be the stable state but that only means this state is the most probable one and the composite particle is only mostly in that state, not always!