R$\nu$MDM and Lepton Flavor Violation

TL;DR

This paper introduces a model linking dark matter and neutrino mass scales without extending the SM gauge symmetry, predicting detectable dark matter interactions and lepton flavor violation signals.

Contribution

The model uniquely combines radiative seesaw and minimal dark matter frameworks within the Standard Model gauge group, predicting observable phenomena.

Findings

Dark matter candidate with 9-10 TeV mass

Predicted dark matter-nucleus scattering cross section accessible to future experiments

Observable charged lepton flavor violation processes such as $l_i o l_j \gamma$ and $\mu - e$ conversion

Abstract

A model relating radiative seesaw and minimal dark matter mass scales without beyond the standard model (SM) gauge symmetry (R$\nu$MDM) is constructed. In addition to the SM particles, the R$\nu$MDM contains, a Majorana fermion multiplet $N_R$ and scalar multiplet $\chi$ that transform respectively as $(1,5,0)$ and $(1,6,-1/2)$ under the SM gauge group $SU(3)_C\times SU(2)_L\times U(1)_Y$. The neutral component $N_R^0$ plays the role of dark matter with a mass in the range of 9 to 10 TeV. This scale also sets the lower limit for the scale for the heavy degrees of freedom in $N_R$ and $\chi$ which generate light neutrino masses through the radiative seesaw mechanism. The model predicts an $N_R^0$-nucleus scattering cross section that would be accessible with future dark matter direct detection searches as well as observable effects in present and searches for charged lepton flavor violating processes, such as $l_i\to l_j \gamma$ and $\mu - e$ conversion.