Neutrino properties from cosmology

TL;DR

This paper reviews how cosmology and experiments together constrain neutrino properties, especially mass and sterile neutrinos, highlighting current bounds, future sensitivities, and potential resolutions of anomalies.

Contribution

It provides a comprehensive review of current neutrino mass bounds, forecasts future experimental sensitivities, and discusses sterile neutrino self-interactions to reconcile anomalies.

Findings

Current cosmological bounds on neutrino mass sum

Forecasted sensitivities of future experiments

Sterile neutrino self-interactions can reconcile oscillation anomalies

Abstract

The interplay between cosmology and earth based experiments is crucial in order to pin down neutrino physics. Indeed cosmology can provide very tight, yet model dependent, constraints on some neutrino properties. Here we focus on the neutrino mass sum, reviewing the up to date current bounds and showing the results of our forecast of the sensitivity of future experiments. Finally, we discuss the case for sterile neutrinos, explaining how non standard sterile neutrino self-interactions can reconcile the oscillation anomalies with cosmology.