Light dark matter for Fermi-LAT and CDMS observations

Bumseok Kyae; Jong-Chul Park

doi:10.1016/j.physletb.2014.04.003

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arXiv · 1310.2284

Light dark matter for Fermi-LAT and CDMS observations

Bumseok Kyae·Jong-Chul Park

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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.

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Bumseok Kyae, Jong-Chul Park. 2014-04-24. Light dark matter for Fermi-LAT and CDMS observations. https://doi.org/10.1016/j.physletb.2014.04.003

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