Can LHC Test the See-Saw Mechanism?

Understand

We discuss the prospects for detecting right-handed neutrinos which are introduced in the see-saw mechanism at future colliders.

• This requires a very accurate cancellation between contributions from different right-handed neutrinos to the light neutrino mass matrix.
• We search for possible symmetries behind this cancellation and find that they have to include lepton number conservation.
• Light neutrino masses can be generated as a result of small symmetry-breaking perturbations.