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Título:
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Spectral study of the HESS J1745-290 gamma-ray source as dark matter signal
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Autores:
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López Maroto, Antonio ;
Ruiz Cembranos, José Alberto ;
Gammaldi, Viviana
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Tipo de documento:
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texto impreso
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Editorial:
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IOP publishing ltd, 2013-04
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física
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Tipo = Artículo
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Resumen:
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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.
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En línea:
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https://eprints.ucm.es/id/eprint/25690/1/MarotoAL01.pdf
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