# Neutrinos and Symmetries

## TL;DR

This paper reviews key symmetry aspects in neutrino physics, including mass symmetries, flavor symmetries in dense gases, and mixing angles related to CP-violation, highlighting their theoretical and astrophysical significance.

## Contribution

It provides a concise overview of three major symmetry facets in neutrino physics, connecting theoretical models to astrophysical phenomena and experimental parameters.

## Key findings

- SO(5) symmetry relates to neutrino mass and see-saw mechanism
- Flavor SU(N) symmetries describe dense neutrino gases in astrophysics
- Discussion on theta13 and CP-violation implications

## Abstract

Three facets of symmetries in neutrino physics are briefly reviewed: i) The SO(5) symmetry of the neutrino mass and and its connection to the see-saw mechanism; ii) Flavor SU(N) symmetries of dense, self-interacting neutrino gases in astrophysical settings; iii) The neutrino mixing angle theta13 and possible CP-violation in the neutrino sector.