High Energy Electron Signals from Dark Matter Annihilation in the Sun

Details High Energy Electron Signals from Dark Matter Annihilation in the Sun High Energy Electron Signals from Dark Matter Annihilation in the Sun

2009-10-12

arxiv.org/abs/0910.1839v2

Phys.Rev.D82:115012,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 5 figures, 1 table, clarifications added, published version

Scientific paper

10.1103/PhysRevD.82.115012

In this paper we discuss two mechanisms by which high energy electrons resulting from dark matter annihilations in or near the Sun can arrive at the Earth. Specifically, electrons can escape the sun if DM annihilates into long-lived states, or if dark matter scatters inelastically, which would leave a halo of dark matter outside of the sun. Such a localized source of electrons may affect the spectra observed by experiments with narrower fields of view oriented towards the sun, such as ATIC, differently from those with larger fields of view such as Fermi. We suggest a simple test of these possibilities with existing Fermi data that is more sensitive than limits from final state radiation. If observed, such a signal will constitute an unequivocal signature of dark matter.

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