Spectral Study of the HESS J1745-290 Gamma-Ray Source as Dark Matter Signal
Abstract
We study the main spectral features of the gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source during the years 2004, 2005 and 2006. In particular, we show that these data are well fitted as the secondary gamma-rays photons generated from dark matter annihilating into Standard Model particles in combination with a simple power law background. We present explicit analyses for annihilation in a single standard model particle-antiparticle pair. In this case, the best fits are obtained for the u and d quark-antiquark channels and for the WW and ZZ gauge bosons, with background spectral index compatible with the Fermi-Large Area Telescope (LAT) data from the same region. The fits return a heavy WIMP, with a mass above 10 TeV approximately, but well below the unitarity limit for thermal relic annihilation.
Keywords
Cite
@article{arxiv.1302.6871,
title = {Spectral Study of the HESS J1745-290 Gamma-Ray Source as Dark Matter Signal},
author = {J. A. R. Cembranos and V. Gammaldi and A. L. Maroto},
journal= {arXiv preprint arXiv:1302.6871},
year = {2013}
}
Comments
15 pages, 14 figures. arXiv admin note: text overlap with arXiv:1204.0655