W-WIMP Annihilation as a Source of the Fermi Bubbles

2013/05/31 by Luis Alfredo Anchordoqui, Brian James Vlcek
Physics and Astronomy · #hep-ph #astro-ph.CO

paper · pdf · doi:10.1103/physrevd.88.043513

published as Phys. Rev. D 88, 043513 (2013) · Matching PRD version. arXiv admin note: text overlap with arXiv:1305.0146, arXiv:1302.6589, arXiv:1201.1303 by other authors

arxiv created 2013/08/27 · arxiv updated 2013/08/28

Abstract

The Fermi Gamma-ray Space Telescope discovered two γ-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 entirely clear. It was recently shown that the spectral shape of the emission from the Fermi bubbles is well described by an approximately 50 GeV dark matter particle annihilating to b b, with a normalization corresponding to a velocity average annihilation cross section of < σ_b v > ~ 8 × 10^-27 cm³/s. We study the minimal hidden sector recently introduced by Weinberg and examine to what extent its weakly-interacting massive particles (W-WIMPs) are capable of accommodating both the desired effective annihilation rate into quarks and the observed relic density.

Citations

• Tracing the Interplay between Non-Thermal Dark Matter and Right-Handed Dirac Neutrinos with LHC Data
• Two Emission Mechanisms in the Fermi Bubbles: A Possible Signal of Annihilating Dark Matter
• The Empirical Case For 10 GeV Dark Matter