New scotogenic model of neutrino mass with U(1)D gauge interaction

Abstract

We propose a new realization of the one-loop radiative model of neutrino mass generated by dark matter (scotogenic), where the particles in the loop have an additional U (1) D gauge symmetry, which may be exact or broken to Z 2 . This model is relevant to a number of astrophysical observations, including AMS-02 and the dark matter distribution in dwarf galactic halos.

Dirac neutrino mass generation from a Majorana messenger

“…For the tree-level type-I seesaw we can have either light Majorana neutrinos with heavy Majorana mediators [10][11][12][13] or light Dirac neutrinos with heavy Dirac mediators [14][15][16][17]. The radiative type-I seesaw includes both [18] possibilities [19], but now it is also possible to have light Majorana neutrinos with heavy Dirac mediators [20]. In this work we want to explore the possibility to build a simple Dirac radiative type-I seesaw model with heavy Majorana mediators.…”

Phenomenology of the generalised scotogenic model with fermionic dark matter

“…A similar model to the GScM with a gauged U(1) DM symmetry has been introduced in Ref. [15]. Several variants of the ScM with a U(1) symmetry instead of a Z 2 symmetry have been proposed [16,17] after the original ScM model.…”

Lepton Flavor Violation in the singlet-triplet scotogenic model

“…This discrete symmetry forbids the usual treelevel contribution to neutrino masses, which are induced at the 1-loop level, and gives rise to a stable state, a weakly-interacting dark matter candidate. The phenomenology of this model has been studied in great detail, see , and several theoretical aspects have been discussed in the recent literature, such as renormalization group running effects [24][25][26] as well as new model building directions [27][28][29][30][31][32].…”