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2012

Composite magnetic dark matter and the 130 GeV line

Cline, James M., Frey, Andrew R., Moore, Guy D.

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We propose an economical model to explain the apparent 130 GeV gamma ray peak, found in the Fermi/LAT data, in terms of dark matter annihilation through a dipole moment interaction.

The annihilating dark matter particles represent a subdominant component, with mass density 7-17% of the total DM density; and they only annihilate into gamma gamma, gamma Z, and ZZ, through a magnetic (or electric) dipole moment.
Annihilation into other standard model particles is suppressed, due to a mass splitting in the magnetic dipole case, or to p-wave scattering in the electric dipole case.
In either case, the observed signal requires a dipole moment of strength mu ~ 2/TeV.

Composite magnetic dark matter and the 130 GeV line · Around

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