Probing the Majorana nature of TeV-scale radiative seesaw models at collider experiments

TL;DR

This paper investigates how TeV-scale radiative seesaw models, which generate tiny neutrino masses through loop corrections and feature an extended Higgs sector, can be tested at collider experiments, especially focusing on the Majorana nature.

Contribution

It demonstrates that the Majorana nature of these models can be directly tested at the International Linear Collider through specific collision experiments.

Findings

Extended Higgs sector properties can be partially explored at colliders.

The Majorana nature can be directly tested at the ILC.

Collider experiments provide a promising way to probe these models.

Abstract

A general feature of TeV-scale radiative seesaw models, in which tiny neutrino masses are generated via loop corrections, is an extended scalar (Higgs) sector. Another feature is the Majorana nature; e.g., introducing right-handed neutrinos with TeV-scale Majorana masses under the discrete symmetry, or otherwise introducing some lepton number violating interactions in the scalar sector. We study phenomenological aspects of these models at collider experiments. We find that, while properties of the extended Higgs sector of these models can be explored to some extent, the Majorana nature of the models can also be tested directly at the International Linear Collider via the electron-positron and electron-electron collision experiments.