Yet another symmetry breaking to be discovered

TL;DR

This paper reviews a novel approach to detecting lepton number violation, a type of symmetry breaking in low-energy physics linked to the universe's matter-antimatter asymmetry, highlighting its significance and potential methods.

Contribution

It introduces a new perspective on searching for lepton number violation as a form of symmetry breaking that is typically broken at high energies but can be studied at low energies.

Findings

Proposes a method to detect lepton number violation.

Links symmetry breaking to matter-antimatter asymmetry.

Highlights the importance of low-energy experiments for high-energy symmetry phenomena.

Abstract

The discovery of spontaneous symmetry breaking in particle physics was the greatest contribution in Nambu's achievements. There is another class of symmetries that exist in the low energy nature, yet is doomed to be broken at high energy, due to a lack of protection of the gauge symmetry. I shall review our approach to search for this class of symmetry breaking, the lepton number violation linked to generation of the matter-antimatter asymmetry in our universe.