Implications of Fermionic Dark Matter on recent neutrino oscillation data

TL;DR

This paper explores how fermionic dark matter within a scotogenic model influences neutrino oscillation parameters, relic abundance, and lepton flavor violation, providing a comprehensive analysis consistent with recent experimental data.

Contribution

It introduces a detailed analysis of neutrino masses, mixing, and dark matter relic abundance in a scotogenic model with perturbations to tri-bimaximal mixing.

Findings

Neutrino masses follow a normal hierarchy.

Parameter space consistent with neutrino data and dark matter relic abundance.

Constraints from lepton flavor violating decays are satisfied.

Abstract

We investigate flavor phenomenology and dark matter in the context of scotogenic model. In this model, the neutrino masses are generated through radiative corrections at one-loop level. Considering the neutrino mixing matrix to be of tri-bimaximal form with additional perturbations to accommodate the recently observed non-zero value of reactor mixing angle $\theta_{13}$, we obtain the relation between various neutrino oscillation parameters and the model parameters. Working in degenerate heavy neutrino mass spectrum, we obtain light neutrino masses obeying normal hierarchy and also study the relic abundance of fermionic dark matter candidate including co-annihilation effects. A viable parameter space is thus obtained, consistent with neutrino oscillation data, relic abundance and various lepton flavor violating decays such as $\ell_\alpha\to\ell_\beta\gamma$ and $\ell_\alpha \to 3 \, \ell_\beta$.