Light dark matter for Fermi-LAT and CDMS observations
Abstract
Light fermionic/scalar dark matter (DM) (m_DM ~ 8 GeV) neutral under the standard model can be responsible for the CDMS and CoGeNT signals, and the Fermi-LAT gamma-ray excesses. In order to explain them in a relatively simple framework, we have explored various DM annihilation and scattering processes, discussing important phenomenological constraints coming from particle physics. Assuming that the two independent observations have a common DM origin and the processes arise through a common mediator, DM should annihilate into tau/anti-tau lepton pairs through an s-channel, and scatter with nuclei through a t-channel process. To avoid the p-wave suppression, a new Higgs-like scalar field with a mass of O(1) TeV is necessary as a common mediator of both the processes. We propose a supersymmetric model realizing the scenario.
Cite
@article{arxiv.1310.2284,
title = {Light dark matter for Fermi-LAT and CDMS observations},
author = {Bumseok Kyae and Jong-Chul Park},
journal= {arXiv preprint arXiv:1310.2284},
year = {2015}
}
Comments
17 pages, 3 figures; typos corrected, references added; published in PLB