2026-06-29T02:33:55Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/335532023-08-28T10:15:29Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc López Maroto, Antonio author Ruiz Cembranos, José Alberto author Gammaldi, Viviana author 2013-04 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 (u) over bar and d (d) over bar quark channels and for the W+W- 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 similar to 10 TeV, but well below the unitarity limit for thermal relic annihilation. 1475-7516 10.1088/1475-7516/2013/04/051 https://hdl.handle.net/20.500.14352/33553 http://dx.doi.org/10.1088/1475-7516/2013/04/051 http://iopscience.iop.org Spectral study of the HESS J1745-290 gamma-ray source as dark matter signal