Hidden by their tiny mass, neutrinos may carry a profound secret with far-reaching consequences for particle physics and cosmology. Given zero electric charge and no colour, they may be Majorana particles; fermions that are their own anti-particles. Double beta decay offers a unique probe for this hypothesis. Finding no neutrinos in its final state would prove lepton number non-conservation and identify neutrinos as Majorana particles. The experimental signature is the emission of two electrons, sharing the full available decay energy; hence, a mono-energetic peak at the end of a standard-model allowed continuum. Current experiments are aiming for neutrinoless double beta decay half-lives beyond 1026 yr.
[Extract from C. Wiesinger PhD Thesis]

Why does it (anti-)matter?
Motivation for this experiment

Why does it (anti-)matter?

Motivation for this experiment

The matter-antimatter asymmetry in the Universe & other good reasons to build this experiment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Neutrino physics without neutrinos
Neutrinoless double beta decay

Neutrino physics without neutrinos

Neutrinoless double beta decay

Observing the creation of matter in nature.

The needle in the haystack
Experimental challenges

The needle in the haystack

Experimental challenges

External & Internal battles towards the detection signal

Route for Development
to LEGEND-1000

Route for Development

to LEGEND-1000

Discover LEGEND pathway