Phenomenology of scotogenic scalar dark matter

Abstract

We reexamine the minimal Singlet $$+$$ + Triplet Scotogenic Model, where dark matter is the mediator of neutrino mass generation. We assume it to be a scalar WIMP, whose stability follows from the same $${\mathbb {Z}}_{2}$$ Z 2 symmetry that leads to the radiative origin of neutrino masses. The scheme is the minimal one that allows for solar and atmospheric mass scales to be generated. We perform a full numerical analysis of the signatures expected at dark matter as well as collider experiments. We identify parameter regions where dark matter predictions agree with theoretical and experimental constraints, such as neutrino oscillations, Higgs data, dark matter relic abundance and direct detection searches. We also present forecasts for near future direct and indirect detection experiments. These will further probe the parameter space. Finally, we explore collider signatures associated with the mono-jet channel at the LHC, highlighting the existence of a viable light dark matter mass range.

An extensive study of dark matter and neutrino phenomenology in the Triplet + Singlet Scotogenic Model

“…For our analysis we considered the constraints detailled in [3]. They include lepton flavor violation, neutrino oscillations, the invisible decay of the Higgs, as well as constraints from cosmology and dark matter phenomenology, explained in the following.…”

“…In addition to the SM gauge symmetry there is a discrete Z 2 symmetry that makes the lightest Z 2 -odd or "dark" particle stable and to ensure the radiative generation of neutrino masses. In this model, two neutrinos acquire mass and this will have implications on 0ν ββ process [3]. The full particle content of the model is given in Table 1.…”

“…The first Yukawa term Y αβ is the SM interaction for leptons, which we can assume to be diagonal in flavor (Greek indices stand for family indices). More information about the scalar potential and the fermionic sector of this model is shown in [3]. For the scalar sector, the physical masses will be…”

Scotogenic dark matter in an orbifold theory of flavor

“…Likewise, many models adding particle dark matter to the standard model can be envisaged. An interesting idea is that dark matter is the mediator of neutrino mass generation, the corresponding models have been dubbed scotogenic [4][5][6][7][8][9][10][11][12][13]. An even tougher challenge in particle physics is understanding flavor, i.e.…”

Electroweak symmetry breaking in the inverse seesaw mechanism

“…Modulo, of course, explaining the detailed pattern of mixing angles indicated by the oscillation data[8].Such a challenging task would require a family symmetry, whose detailed nature is not yet fully understood 7. This feature may also be implemented in some radiative schemes of scotogenic type, see e.g [55][56][57]…”