CPViolation in Hyperon Decays due to Left-Right Mixing

We consider the CP violating asymmetry A in polarization in hyperon and antihyperon decays due to left-right mixing in a class of left-right symmetric models. We find that the gluon dipole penguin operator dominates the contributions to the CP violating asymmetry. For $\Lambda \to p{\pi }^{-}$, even though the S-wave contribution to A is constrained from experimental data on ${\epsilon }^{\prime }/\epsilon$, A can be as large as ${10}^{-4\mathrm{}}$. For P wave, the contribution is not directly related to ${\epsilon }^{\prime }/\epsilon$. A can be even larger, and may reach $6\times {10}^{-4\mathrm{}}$. This is much larger than the value expected for A in the standard model.