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Homework Help: Pair production

  1. Feb 10, 2010 #1
    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 ?
  2. jcsd
  3. Feb 10, 2010 #2


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    Conservation of angular momentum requires that their spins be in opposite directions unless they interact with another object.
  4. Feb 10, 2010 #3
    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*)
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