Leptogenesis and LHC Physics with Type III See-Saw

TL;DR

This paper reviews the Type III See-Saw model, which explains neutrino masses and baryon asymmetry, and discusses its testability at the LHC through the production of triplet leptons with gauge interactions.

Contribution

It highlights the potential for low-mass triplet leptons in the Type III See-Saw model to be produced and detected at the LHC, linking leptogenesis with collider physics.

Findings

Low-mass triplet leptons as light as a TeV are possible.

Gauge interactions facilitate detection of triplet leptons at LHC.

Type III See-Saw can be tested through collider experiments.

Abstract

The See-Saw mechanism provides a nice way to explain why neutrino masses are so much lighter than their charged lepton partners. It also provides a nice way to explain baryon asymmetry in our universe via the leptogenesis mechanism. In this talk we review leptogenesis and LHC physics in a See-Saw model proposed in 1989, now termed the Type III See-Saw model. In this model, $SU(2)_L$ triplet leptons are introduced with the neutral particles of the triplets playing the role of See-Saw. The triplet leptons have charged partners with standard model gauge interactions resulting in many new features. The gauge interactions of these particles make it easier for leptognesis with low masses, as low as a TeV is possible. The gauge interactions also make the production and detection of triplet leptons at LHC possible. The See-Saw mechanism and leptogenesis due to Type III See-Saw may be tested at LHC.