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CP Violation In Hyperon Decays Due To Left-Right Mixing

Darwin Chang·Xiao-Gang He·Sandip Pakvasa
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Abstract

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 $ε'/ε$. 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 $ε'/ε$. Its contribution to A can be larger and may reach $6\times 10^{-4}$ in $Λ\rightarrow pπ^-$. This is much larger than the value expected for A in the Standard Model.

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Darwin Chang, Xiao-Gang He, Sandip Pakvasa. 1994-12-07. CP Violation In Hyperon Decays Due To Left-Right Mixing. https://doi.org/10.1103/physrevlett.74.3927

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