  We report on a study of the sequential hyperon decay
$\Sigma^0\rightarrow\Lambda \gamma;\Lambda\rightarrow p\pi^- $ and its
corresponding anti-hyperon decay. We derive a multi-dimentional and
model-independent formalism for the case when the hyperons are produced in the
reaction $e^+e^-\rightarrow\Sigma^0\bar{\Sigma}^0$. Cross-section distributions
are calculated using the folding technique. We also study sequential decays of
single-tagged hyperons.
