Our Galaxy resides in the center of a vast "Halo" of Dark Matter (DM). This concentration produces, in many viable particle physics models, an indirect Weakly Interacting Massive Particle (WIMP) annihilation signal that peaks in the Fermi-LAT's energy range. Our knowledge of the diffuse background is essential to placing reasonable limits on the DM mass and cross-section. We incorporate a systematic variation of the GALPROP galactic diffuse background model, constrained by current cosmic-ray measurements, into a profile likelihood analysis and present preliminary upper limits on the DM annihilation cross-section using the Fermi-LAT data.
@article{arxiv.1012.0863,
title = {Fermi-LAT constraints on diffuse Dark Matter annihilation from the Galactic Halo},
author = {Brandon Anderson},
journal= {arXiv preprint arXiv:1012.0863},
year = {2015}
}
Comments
On behalf of the Fermi-LAT Collaboration. 5 pages, 4 figures. Proceedings from Identification of Dark Matter 2010 conference