Observable Seesaw and its Collider Signatures

TL;DR

This paper explores collider signatures of TeV-scale right-handed neutrinos in models with extra dimensions, highlighting potential signals at the LHC that could reveal the origin of neutrino masses and extra spatial dimensions.

Contribution

It proposes a collider signature involving tri-lepton final states and missing energy as a probe for TeV-scale right-handed neutrinos and extra dimensions.

Findings

LHC has potential to discover signals of extra dimensions.

Tri-lepton plus missing energy is a key signature.

The scenario explains tiny neutrino masses while allowing sizable couplings.

Abstract

We discuss the scenario with TeV-scale right-handed neutrinos, which are accessible at future colliders, while holding down tiny seesaw-induced masses and sizable couplings to the standard-model particles. The signal with tri-lepton final states and large missing transverse energy is appropriate for studying collider signatures of the scenario with extra spatial dimensions. We show that the LHC experiment generally has a potential to discover the signs of extra dimensions and the origin of small neutrino masses.