  We study rare decays of hyperons involving di-neutrinos in the final state in
the standard model and compare them with other models. It is claimed that the
branching ratio calculated in this article are 2 times the values of 331 model
and exceptionally large than the previously calculated values. We explore the
nonstandard neutrino interactions (NSI) and constrain NSIs free parameter with
these decays. We obtain stringent bounds on of O(0.01). We show that branching
ratios (Br) could be in the range of BES III if constraints are O(0.3).
