Physical Review
Spin Correlation Mediated by a Spinless Particle
Asher Peres
Abstract
We consider a process in which a neutral spinless particle decays into a charged spin-1 particle ${V}^{\ifmmode\pm\else\textpm\fi{}}$ and a charged spin-0 particle. The latter then decays into a ${V}^{\ensuremath{\mp}}$ and another neutral spinless particle. It is shown that the spins of the ${V}^{+}$ and ${V}^{\ensuremath{-}}$ are correlated. This correlation, however, becomes vanishingly small as soon as it is possible to decide whether the ${V}^{+}$ or the ${V}^{\ensuremath{-}}$ was emitted first.