\begin{document}$s\to d\nu\bar{\nu}$\end{document} rare hyperon decays in SM and beyond. We find that in SM the branching ratios for these rare hyperon decays range from \begin{document}$10^{-14}$\end{document} to \begin{document}$10^{-11}$\end{document} . When all the errors in the form factors are included, we find that the final branching ratios for most decay modes have an uncertainty of about 5% to 10%. After taking into account the contribution from new physics, the generalized SUSY extension of SM and the minimal 331 model, the decay widths for these channels can be enhanced by a factor of \begin{document}$2 \sim 7$\end{document}."> Study of the <inline-formula><tex-math id="M1">\begin{document}${{s\to d\nu\bar{\nu}}}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/cpc/article/app/id/96c962a2-ed0a-44a8-af04-7c17a5d1b8c5/CPC-2019-0021_M1.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/cpc/article/app/id/96c962a2-ed0a-44a8-af04-7c17a5d1b8c5/CPC-2019-0021_M1.png"/></alternatives></inline-formula> rare hyperon decays in the Standard Model and new physics -
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