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arXiv · 1302.6871

Spectral Study of the HESS J1745-290 Gamma-Ray Source as Dark Matter Signal

J. A. R. Cembranos·V. Gammaldi·A. L. Maroto
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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.

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J. A. R. Cembranos, V. Gammaldi, A. L. Maroto. 2013-03-08. Spectral Study of the HESS J1745-290 Gamma-Ray Source as Dark Matter Signal. https://doi.org/10.1088/1475-7516%2F2013%2F04%2F051

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