Cosmic Rays from Heavy Dark Matter from the Galactic Center
Abstract
The gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source is well fitted by the secondary photons coming from Dark Matter (DM) annihilation in particle-antiparticle standard model pairs over a diffuse power-law background. The spectral features of the signal are consistent with different channels: light quarks, electro-weak gauge bosons and top-antitop production. The amount of photons and morphology of the signal localized within a region of few parsecs, require compressed DM profiles as those resulting from baryonic contraction, which offer large enhancements in the signal over DM alone simulations. The fits return a heavy WIMP, with a mass above 10 TeV, but well below the unitarity limit for thermal relic annihilation. The fitted background spectral index is compatible with the Fermi-Large Area Telescope (LAT) data from the same region. This possibility can be potentially tested with the observations of other high energy cosmic rays.
Cite
@article{arxiv.1310.8230,
title = {Cosmic Rays from Heavy Dark Matter from the Galactic Center},
author = {Jose A. R. Cembranos and Viviana Gammaldi and Antonio L. Maroto},
journal= {arXiv preprint arXiv:1310.8230},
year = {2013}
}
Comments
Proceedings of the European Physical Society Conference on High Energy Physics EPS-HEP2013, 18-24 July 2013, Stockholm (Sweden)