TY  - JOUR
AU  - Escudero, M.
AU  - Rius, N.
AU  - Sanz, V.
PY  - 2017
DA  - 2017//
TI  - Sterile neutrino portal to Dark Matter II: exact dark symmetry
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 397 - 11pp
VL  - 77
IS  - 6
PB  - Springer
AB  - We analyze a simple extension of the standard model (SM) with a dark sector composed of a scalar and a fermion, both singlets under the SM gauge group but charged under a dark sector symmetry group. Sterile neutrinos, which are singlets under both groups, mediate the interactions between the dark sector and the SM particles, and generate masses for the active neutrinos via the seesaw mechanism. We explore the parameter space region where the observed Dark Matter relic abundance is determined by the annihilation into sterile neutrinos, both for fermion and scalar Dark Matter particles. The scalar Dark Matter case provides an interesting alternative to the usual Higgs portal scenario. We also study the constraints from direct Dark Matter searches and the prospects for indirect detection via sterile neutrino decays to leptons, which may be able to rule out Dark Matter masses below and around 100 GeV.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1607.02373
UR  - https://doi.org/10.1140/epjc/s10052-017-4963-x
DO  - 10.1140/epjc/s10052-017-4963-x
LA  - English
N1  - WOS:000403504200002
ID  - Escudero_etal2017
ER  -