The effects of nonstandard neutrino interactions (NSIs) in KL0 → π0νν̄, B+ → π+νν̄, B+ → K∗+νν̄ and B → Xsνν̄

Abstract

We study the rare decays [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] for the search of NSIs. We want to constrain the NSIs by using these reactions. We show that there is a strong dependence of these reactions on new physics free parameter [Formula: see text], where [Formula: see text], [Formula: see text], [Formula: see text]. We include second and third generation of quarks in the loop for these decays. We show that the [Formula: see text] is providing very precise bounds as compared to all other semileptonic decays, having neutrinos in their final state. We further show that the interference between standard model and NSIs is giving dominant contribution for [Formula: see text], [Formula: see text] and [Formula: see text]. We point out that the constraints for [Formula: see text] and [Formula: see text] are more precise as compared to [Formula: see text]. The analysis of [Formula: see text], [Formula: see text] and [Formula: see text], provide us that the [Formula: see text]-quark induced Br of NSIs are giving very small contribution. We also compare these decays to the decays of charm and kaons having neutrinos in the final state.