Exotic Charges, Multicomponent Dark Matter and Light Sterile Neutrinos
Abstract
Generating small sterile neutrino masses via the same seesaw mechanism that suppresses active neutrino masses requires a specific structure in the neutral fermion mass matrix. We present a model where this structure is enforced by a new U(1)' gauge symmetry, spontaneously broken at the TeV scale. In order not to spoil the neutrino structure, the additional fermions necessary for anomaly cancellations need to carry exotic charges, and turn out to form multicomponent cold dark matter. The active-sterile mixing then connects the new particles and the Standard Model---opening a new portal in addition to the usual Higgs- and kinetic-mixing portals---which leads to dark matter annihilation almost exclusively into neutrinos.
Keywords
Cite
@article{arxiv.1211.0538,
title = {Exotic Charges, Multicomponent Dark Matter and Light Sterile Neutrinos},
author = {Julian Heeck and He Zhang},
journal= {arXiv preprint arXiv:1211.0538},
year = {2013}
}
Comments
11 pages, 3 figures. More references, longer discussions. Matches JHEP version