Aachen 2019 – scientific programme
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T: Fachverband Teilchenphysik
T 64: Theorie: Dunkle Materie
T 64.5: Talk
Wednesday, March 27, 2019, 17:00–17:15, S16
Triplet scalar and singlet–doublet fermion dark matter in a radiative model of neutrino masses — Juri Fiaschi1, Michael Klasen1, and •Simon May1,2 — 1Westfälische Wilhelms-Universität Münster — 2Max-Planck-Institut für Astrophysik
We present a detailed study of a combined triplet scalar and singlet–doublet fermion model for dark matter. These models have only been studied separately in the past. Together, they form a simple extension of the Standard Model that can account for dark matter and explain the existence of neutrino masses, which are generated radiatively. However, this also implies the existence of lepton flavor-violating (LFV) processes. In addition, this particular model allows for gauge coupling unification. The new fields are odd under a new Z2 symmetry to stabilize the dark matter candidate.
We analyze the dark matter, neutrino mass and LFV aspects both separately and in conjunction, exploring the model’s viable parameter space. This is done using numerical random scans imposing the relic density, neutrino mass and Higgs mass constraints. We discover differing properties of the scalar and fermion dark matter candidates in this model and discuss this model’s features in contrast with earlier studies of its separate components and of similar radiative neutrino mass models.