Phenomenology of a singlet-doublet-triplet scotogenic framework

TL;DR

This paper conducts a comprehensive phenomenological analysis of a scotogenic model with multiple new particles, identifying viable dark matter candidates and predicting specific mass peaks, with implications for future experiments.

Contribution

It introduces a detailed study of a complex scotogenic framework with new particles, exploring its parameter space and phenomenological viability using MCMC techniques.

Findings

Dark matter mass peaks at 550 GeV, 1080 GeV, and 2300 GeV.

Relic density achieved mainly through co-annihilations.

Future experiments can probe much of the viable parameter space.

Abstract

We present an extensive phenomenological study of a scotogenic framework including a scalar singlet, a scalar doublet, a fermionic doublet, and two generations of a fermionic triplet, allowing to provide three non-zero neutrino masses and three viable dark matter candidates. Using a Markov Chain Monte Carlo numerical technique, we probe the parameter space of the model in view of numerous constraints stemming from dark matter, the neutrino sector, and lepton-flavour violating transitions. The dark matter mass distribution of phenomenologically viable scenarios exhibits three very predictive peaks at 550 GeV, 1080 GeV, and 2300 GeV. In all viable parameter regions, the observed relic density is achieved through dominant co-annihilations. Future experiments will be able to probe a large number of the currently viable parameter space, while certain parameter configurations promise interesting collider signatures. For related studies, five typical parameter configurations are given in SLHA format.