Clockworking FIMPs

TL;DR

This paper explores how the Clockwork mechanism can be used to create freeze-in dark matter models, analyzing their theoretical construction, mass matrix diagonalization, and potential collider signatures.

Contribution

It introduces novel scalar and fermionic dark matter models utilizing the Clockwork mechanism, addressing key subtleties in model building and providing detailed analytical and numerical analyses.

Findings

Successful construction of viable scalar and fermionic Clockwork FIMP models

Analytic and numerical methods for mass matrix diagonalization

Discussion of potential LHC phenomenology of these models

Abstract

We study freeze-in dark matter production in models that rely on the Clockwork mechanism to suppress the dark matter couplings to the visible sector. We construct viable scalar and fermionic dark matter models within this Clockwork FIMP scenario, with several subtleties that need to be taken into account revealed in the model-building process. We also provide analytic, semi-analytic and numerical results for the diagonalization of Clockwork-type mass matrices and briefly discuss the LHC phenomenology of the corresponding scenarios.