Revisiting the Number-Theory Dark Matter Scenario and the Weak Gravity Conjecture
Abstract
We revisit the number-theory dark matter scenario where one of the light chiral fermions required by the anomaly cancellation conditions of U(1)_{B-L} explains dark matter. Focusing on some of the integer B-L charge assignments, we explore a new region of the parameter space where there appear two light fermions and the heavier one becomes a dark matter of mass O(10)keV or O(10)MeV. The dark matter radiatively decays into neutrino and photon, which can explain the tantalizing hint of the 3.55keV X-ray line excess. Interestingly, the other light fermion can erase the AdS vacuum around the neutrino mass scale in a compactification of the standard model to 3D. This will make the standard model consistent with the AdS-WGC statement that stable non-supersymmetric AdS vacua should be absent.
Keywords
Cite
@article{arxiv.1811.01755,
title = {Revisiting the Number-Theory Dark Matter Scenario and the Weak Gravity Conjecture},
author = {Kazunori Nakayama and Fuminobu Takahashi and Tsutomu T. Yanagida},
journal= {arXiv preprint arXiv:1811.01755},
year = {2019}
}
Comments
16 pages, 4 figures