Light sterile neutrinos effects in processes with electron and muon neutrinos

TL;DR

This paper investigates how light sterile neutrinos, with masses around or below 1 eV, influence various neutrino oscillation and decay processes, providing calculations based on current experimental data.

Contribution

It offers a detailed analysis of sterile neutrino effects in processes involving electron and muon neutrinos, considering different mass distribution scenarios and experimental constraints.

Findings

Sterile neutrinos can significantly affect neutrino oscillation characteristics.

The study provides estimates of mixing parameters consistent with experimental data.

Results aid in interpreting current experiments and predicting future outcomes.

Abstract

Sterile neutrinos with various masses could be participated in astrophysical and cosmological processes including mixing with active neutrinos, if exist. It is considered the possible effects of mixing of active and sterile neutrinos with masses of the order or less than 1 eV. For oscillation processes involving electron and muon neutrinos, as well as for beta decay and neutrinoless double beta decay processes, the contributions of light sterile neutrinos in the characteristics of these processes are calculated. For this purpose the estimates of the mixing parameters in the model with three active and three sterile neutrinos are made taking into account experimental data. Two cases of sterile neutrinos masses distribution are considered in detail. The results obtained can be used for interpretation of available experimental data, and also for predictions of subsequent experimental results.