CP Violation In Hyperon Decays Due To Left-Right Mixing

We consider CP violation due to left-right mixing in a class of Left-Right symmetric models and show that it leads to observable effects in hyperon decays. For S-wave, the contribution to CP violating asymmetry A of the polarization in hyperon and anti-hyperon decays is proportional to ${ϵ}^{\mathrm{\prime }}\mathrm{/}ϵ$. While the tree level L-R operators contribution is constrained to be less than ${10}^{-5}$, the gluon penguin operator contribution can be as large as ${10}^{-4}$. For P-wave, the contribution is not directly related to ${ϵ}^{\mathrm{\prime }}\mathrm{/}ϵ$. Its contribution to A can be larger and may reach $6\times {10}^{-4}$ in $\mathrm{\Lambda }\to p{\pi }^{-}$. This is much larger than the value expected for A in the Standard Model.