Naturalness and Testability of TeV Seesaw Mechanisms

TL;DR

This paper reviews TeV-scale seesaw mechanisms for neutrino mass generation, analyzing their naturalness and testability through collider signatures and CP-violating effects in neutrino oscillations.

Contribution

It provides a comparative discussion of various TeV-scale seesaw models focusing on their naturalness and experimental prospects.

Findings

Collider signatures at the LHC could reveal TeV-scale seesaws.

Non-unitary CP violation effects may be observable in neutrino oscillations.

Different seesaw types offer distinct experimental signatures.

Abstract

After outlining some popular ways to go beyond the standard model so as to generate non-zero but tiny neutrino masses, I focus on several typical seesaw mechanisms and discuss how to get a balance between their theoretical naturalness and their experimental testability. Besides possible collider signatures at the Large Hadron Collider, new and non-unitary CP-violating effects are also expected to show up in neutrino oscillations for type-I, type-(I+II), type-III and double seesaws at the TeV scale.