Abstract
We perform a complete analysis of the consistency of the singlet-triplet scotogenic model, where both dark matter and neutrino masses can be explained. We determine the parameter space that yields the proper thermal relic density been in agreement with neutrino physics, lepton flavor violation, direct and indirect dark matter searches. In particular, we calculate the dark matter annihilation into two photons, finding that the corresponding cross-section is below the present bounds reported by the Fermi-LAT and H.E.S.S. collaborations. We also determine the spin-dependent cross-section for dark matter elastic scattering with nucleons at one-loop level, finding that the next generation of experiments as LZ and DARWIN could test a small region of the parameter space of the model.
Highlights
The STFDM model has a rich phenomenology, with signals for WIMP-nucleons recoils that can be tested in future experiments like XENON1T [15], LZ [16] and DARWIN [17]
We show the behavior of the WIMP-neutron SD cross-section for all the points in the parameter space found in the previous section that yield the expected value of the relic abundance, the correct neutrino oscillation parameters, and are not excluded by lepton flavor violation (LFV) processes
We studied the full consistency of the STFDM model by performing a comparative analysis of a variety of observables
Summary
The STFDM model extends the gauge symmetry of the SM with a new discrete Z2 symmetry that stabilize the DM particle. In addition to the SM particle content, all even under the Z2 symmetry, the STFDM model is extended with a scalar doublet η, a real scalar triplet Ω, and two fermions with zero hypercharge: a singlet N and a triplet Σ. Their charge assignment is shown in table 1. We demand the stability of the potential (bounded from below). Where the vacuum expectation values (VEVs) are themselves determinated by the tadpoles equations tφ In this frame, the Z gauge boson receives a new contribution to its mass. The W boson mass is strongly constrained by the value of the triplet VEV, we demand that vΩ < 5 GeV [22]
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