Status of Sterile Neutrino fits with Global Data

TL;DR

This paper reviews the current status of sterile neutrino models in light of global experimental data, analyzing potential anomalies and fitting models to high mass-squared difference oscillation results.

Contribution

It introduces models for sterile neutrinos and presents the latest global data fits, advancing understanding of potential neutrino anomalies beyond the standard three-neutrino framework.

Findings

Evidence of anomalies in low-energy neutrino experiments

Models accommodating additional sterile neutrinos are discussed

Recent data fits suggest possible sterile neutrino parameters

Abstract

A number of short baseline neutrino oscillation experiments have observed an anomalous excess of neutrinos in the low energy range. This may hint towards the existence of additional neutrino mass splittings. If true, additional sterile (non-interacting) neutrino states above the current 3 neutrino model would be required. On the other hand, many parameters of the allowed space are limited by experiments that have seen no anomaly. We will introduce models which accommodate these additional neutrinos, and then discuss our work towards fitting these models to the available global high $\Delta m^{2}$ oscillation data. We will then present the latest results of these fits.