http://arxiv.org/abs/1706.07028
We study an effective theory beyond the standard model (SM) where either of two additional gauge singlets, a Majorana fermion and a real scalar, constitute all or some fraction of dark matter. The only additional interaction to the SM is via a dimension-five lepton number preserving operator: a neutrino portal interaction. We point out that this interaction (i) generates the neutrino mass radiatively, (ii) gives a cutoff for the cosmic-ray neutrino, and (iii) induces the testable Higgs boson invisible decay in the future lepton colliders, such as the CEPC, ILC, and CLIC. In particular, there are two correlated phenomena. If the dark matter is detected in XENON1T, XENONnT, LZ, DARWIN, or PandaX in future, the Higgs invisible decay is within the reach of the future lepton colliders. If a high energy cutoff of cosmic-ray neutrino, which may account for the non-detection of GZK neutrinos or Glashow resonance, is generated due to its annihilation with the cosmic background neutrino, the Higgs invisible decay can be searched for in these colliders. Moreover, the scale for one of the neutrino masses is predicted. The UV completion and the fine tuning, as well as the constraints from collider physics, cosmology, and astronomy are discussed.
W. Yin
Thu, 22 Jun 17
12/68
Comments: 21 pages, 5 figures