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Free keywords:
High Energy Physics - Phenomenology, hep-ph,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO,High Energy Physics - Experiment, hep-ex,High Energy Physics - Theory, hep-th
Abstract:
We discuss simple models which predict the existence of significant gamma-ray
fluxes from dark matter annihilation. In this context the dark matter candidate
is a Majorana fermion with velocity-suppressed tree-level annihilation into
Standard Model fermions but unsuppressed annihilation into photons. These gamma
lines can easily be distinguished from the continuum and provide a possibility
to test these models.