Emergent neutrinos from heavy messengers

TL;DR

This paper explores how fermionic bound states called mesinos, acting as heavy messengers, can generate neutrino masses through the seesaw mechanism, offering a novel approach to neutrino mass models.

Contribution

It introduces a new class of models where mesinos serve as right-handed neutrinos, demonstrating the feasibility of the seesaw mechanism with these heavy bound states.

Findings

Single mesino models can realize the seesaw mechanism.

Three mesino states produce multiple light and heavy sterile neutrinos.

Proof of principle models show the viability of mesino-based neutrino mass generation.

Abstract

Fermionic bound states (mesinos) of messengers can play the role of right-handed neutrinos and due to their heavy masses they can realize the seesaw mechanism providing light and heavy sterile neutrinos. We study simple models with a single mesino to present the proof of principle. We extend our analysis to three mesino states where after the seesaw mechanism, three light and several heavy sterile neutrinos are obtained.