  We propose an experimental test of local hidden variable theories against
quantum mechanics by measuring the polarization correlation of entangled vector
meson pairs. In our study, the form of the polarization correlation probability
is reproduced in a natural way by interpreting the two-body decay of the meson
as a measurement of its polarization vector within the framework of quantum
mechanics. This provides more detailed information on the quantum entanglement,
thus a new Monte Carlo method to simulate the quantum correlation is
introduced. We discuss the feasibility of carrying out such a test at
experiments in operation currently and expect that the measured correlated
distribution may provide us with deeper insight into the fundamental question
about locality and reality.
