Study of Nonstandard Interactions in Rare Decays of Hyprons with Missing Energy

TL;DR

This paper investigates rare hyperon decays involving neutrinos, comparing standard and nonstandard models, and provides new bounds on nonstandard neutrino interactions with potential experimental implications.

Contribution

It presents updated branching ratio calculations for hyperon decays and constrains nonstandard neutrino interaction parameters more stringently than previous studies.

Findings

Branching ratios are twice those predicted by the 331 model.

Stringent bounds on NSI parameters are established at the order of 0.01.

Potential observability of decays at BES III if NSI constraints are relaxed to 0.3.

Abstract

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).