Neutrinos from the Early Universe and Physics Beyond Standard Models

TL;DR

This paper reviews how neutrino oscillations and properties provide evidence for physics beyond the standard model, focusing on cosmological constraints and hypothetical neutrino models.

Contribution

It offers a comprehensive review of experimental and theoretical developments in neutrino physics beyond the standard model and their cosmological implications.

Findings

Cosmological data constrains the number of neutrino families.

Neutrino mass differences and mixing are tightly constrained.

Light sterile neutrinos are discussed in the context of cosmology.

Abstract

Neutrino oscillations present the only robust example of experimentally detected physics beyond the standard model. This review discusses the established and several hypothetical beyond standard models neutrino characteristics and their cosmological effects and constraints. Particularly, the contemporary cosmological constraints on the number of neutrino families, neutrino mass differences and mixing, lepton asymmetry in the neutrino sector, neutrino masses, light sterile neutrino are briefly reviewed.