Probing the Origin of Neutrino Masses and Mixings via Doubly Charged Scalars: Complementarity of the Intensity and the Energy Frontiers

TL;DR

This paper explores how low-energy experiments and high-energy collider searches together can reveal the origins of neutrino masses through the study of a minimal model involving doubly charged scalars, highlighting their complementary roles.

Contribution

It demonstrates the combined potential of intensity and energy frontier experiments to constrain a minimal neutrino mass model with doubly charged scalars, emphasizing their mutual complementarity.

Findings

High-energy LHC searches constrain doubly charged scalars.

Low-energy lepton flavor violation experiments provide additional constraints.

Combined analysis enhances understanding of neutrino mass origins.

Abstract

We discuss how the intensity and the energy frontiers provide complementary constraints within a minimal model of neutrino mass involving just one new field beyond the Standard Model at accessible energy, namely a doubly charged scalar $S^{++}$ and its antiparticle $S^{--}$. In particular we focus on the complementarity between high-energy LHC searches and low-energy probes such as lepton flavor violation. Our setting is a prime example of how high- and low-energy physics can cross-fertilize each other.