\begin{document}$ J/\psi $\end{document} and \begin{document}$ \psi(2S) $\end{document} mesons into \begin{document}$ \Lambda \overline \Lambda $\end{document} and \begin{document}$ \Sigma^0 {\overline \Sigma}{}^0 $\end{document} hyperons: the angular distribution of the decay \begin{document}$ {{\psi(2S)}} \to {\Sigma^0\overline{\Sigma}{}^0} $\end{document} exhibits an opposite trend with respect to the other three channels: \begin{document}$ J/\psi \to \Lambda \overline \Lambda $\end{document} , \begin{document}$ J/\psi \to \Sigma^0 {\overline \Sigma}{}^0 $\end{document} and \begin{document}$ \psi(2S) \to \Lambda \overline \Lambda $\end{document} . We define a model to explain the origin of this phenomenon."> A model to explain the angular distribution of <inline-formula><tex-math id="M1">\begin{document}$ {{{J /\psi}}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M1.jpg"></graphic><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M1.png"></graphic></alternatives></inline-formula> and <inline-formula><tex-math id="M2">\begin{document}$ {{\psi(2S)}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M2.jpg"></graphic><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M2.png"></graphic></alternatives></inline-formula> decay into <inline-formula><tex-math id="M3">\begin{document}$ {\Lambda \overline{\Lambda}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M3.jpg"></graphic><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M3.png"></graphic></alternatives></inline-formula> and <inline-formula><tex-math id="M4">\begin{document}${\Sigma^0 \overline{\Sigma^0}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M4.jpg"></graphic><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/74409bcf-ebb5-4fe3-8c2e-61220c7c407f/CPC-2018-0370-re_M4.png"></graphic></alternatives></inline-formula> -
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