Luis Alfredo Anchordoqui, Brian Vlcek
The Fermi Gamma-ray Space Telescope discovered two \gamma-ray emitting bubble-shaped structures that extend nearly symmetrically on either side of our Galaxy and appear morphologically connected to the Galactic Center. The origin of the emission is still not clearly understood. It was recently shown that the spectral shape of the emission from the Fermi Bubbles is well described by an approximately 10 GeV dark matter particle annihilating to \tau^+ \tau^-, with a normalization corresponding to a velocity average annihilation cross section of \langle \sigma v \rangle \sim 2 \times 10^{-27} cm^3/s. We study the nominal hidden sector recently introduced by Weinberg and examine to which extent its weakly-interacting massive particles (W-WIMPs) are capable of accommodating both the desired effective annihilation rate into tau leptons and the observed relic density.
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http://arxiv.org/abs/1305.4625
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