Probability of Spin Polarization in Pair Production

[brodskya]

Hi, I have a question which sounds like :
Particle with spin 0 annihilates in two particles with spin one. What is the probability their spin polarization will in the same direction in short time?

I think is 0 because of argument saving spin of the system and correlation function of two particle is 1 (it's correlated in t=0), but by the time the system will become be not correlated at all. Is my logic right ?

 

[Meir Achuz]

Conservation of angular momentum requires that their spins be in opposite directions unless they interact with another object.

 

[Frame Dragger]

Conservation of angular momentum requires that their spins be in opposite directions unless they interact with another object.

This is the basis for entanglement in part, so really it's fairly well established if you're into non-locality. (and who isn't lol. lol. *sigh*)