Light dark matter for Fermi-LAT and CDMS observations
arXiv:1310.2284 · doi:10.1016/j.physletb.2014.04.003
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.
17 pages, 3 figures; typos corrected, references added; published in PLB
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- Towards a Supersymmetric Description of the Fermi Galactic Center Excess
- Class of Higgs-portal Dark Matter models in the light of gamma-ray excess from Galactic center
- Secluded singlet fermionic dark matter driven by the Fermi gamma-ray excess
- A light SUSY dark matter after CDMS-II, LUX and LHC Higgs data
- Galactic Center gamma-ray excess from two-Higgs-doublet-portal dark matter
- Simplified Dark Matter Models Confront the Gamma Ray Excess
- Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
- Galactic center GeV gamma-ray excess from dark matter with gauged lepton numbers
- Boxes, Boosts, and Energy Duality: Understanding the Galactic-Center Gamma-Ray Excess through Dynamical Dark Matter
- Galactic Center Gamma Ray Excess in a Radiative Neutrino Mass Model
- Pseudoscalar Portal Dark Matter and New Signatures of Vector-like Fermions
- Indirect Probes of Dark Matter and Globular Cluster Properties From Dark Matter Annihilation within the Coolest White Dwarfs
- Extension of Minimal Fermionic Dark Matter Model : A Study with Two Higgs Doublet Model