Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-04-08
Phys.Rev.D80:023512,2009
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
11 pages, 4 figures
Scientific paper
10.1103/PhysRevD.80.023512
The spectrum of photons arising from WIMP annihilation carries a detailed imprint of the structure of the dark sector. In particular, loop-level annihilations into a photon and another boson can in principle lead to a series of lines (a WIMP forest) at energies up to the WIMP mass. A specific model which illustrates this feature nicely is a theory of two universal extra dimensions compactified on a chiral square. Aside from the continuum emission, which is a generic prediction of most dark matter candidates, we find a "forest" of prominent annihilation lines that, after convolution with the angular resolution of current experiments, leads to a distinctive (2-bump plus continuum) spectrum, which may be visible in the near future with the Fermi Gamma-Ray Space Telescope (formerly known as GLAST).
Bertone Gianfranco
Jackson C. B.
Shaughnessy Gabe
Tait Tim M. P.
Vallinotto Alberto
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