0000000000550285

AUTHOR

F. Calore

showing 2 related works from this author

Conservative upper limits on WIMP annihilation cross section from Fermi-LAT $γ$-rays

2011

The spectrum of an isotropic extragalactic {\gamma}-ray background (EGB) has been measured by the Fermi-LAT telescope at high latitudes. Two new models for the EGB are derived from the subraction of unresolved point sources and extragalactic diffuse processes, which could explain from 30% to 70% of the Fermi-LAT EGB. Within the hypothesis that the two residual EGBs are entirely due to the annihilation of dark matter (DM) particles in the Galactic halo, we obtain stringent upper limits on their annihilation cross section. Severe bounds on a possible Sommerfeld enhancement of the annihilation cross section are set as well. Finally, we consider models for DM annihilation depending on the inver…

HistoryAstrophysics::High Energy Astrophysical PhenomenaDark matterAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesEducationlaw.inventionGalactic haloTelescopeCross section (physics)WIMPlaw0103 physical sciences010306 general physicsAstrophysics::Galaxy AstrophysicsPhysicsastro-ph.HEAnnihilation010308 nuclear & particles physicsIsotropyhep-phComputer Science ApplicationsHigh Energy Physics - PhenomenologyAstrophysics - High Energy Astrophysical PhenomenaAstrophysics - Cosmology and Nongalactic AstrophysicsFermi Gamma-ray Space Telescope
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Conservative upper limits on WIMP annihilation cross section from Fermi-LAT γ rays

2012

The spectrum of an isotropic extragalactic {\gamma}-ray background (EGB) has been measured by the Fermi-LAT telescope at high latitudes. Two new models for the EGB are derived from the subraction of unresolved point sources and extragalactic diffuse processes, which could explain from 30% to 70% of the Fermi-LAT EGB. Within the hypothesis that the two residual EGBs are entirely due to the annihilation of dark matter (DM) particles in the Galactic halo, we obtain stringent upper limits on their annihilation cross section. Severe bounds on a possible Sommerfeld enhancement of the annihilation cross section are set as well. Finally, we consider models for DM annihilation depending on the inver…

PhysicsNuclear and High Energy PhysicsParticle physicsAnnihilationdark matter theoryAstrophysics::High Energy Astrophysical PhenomenaDark matterGamma raysGamma rayAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsGalactic haloGamma rays; dark matter theoryPulsarWIMPHaloAstrophysics::Galaxy AstrophysicsFermi Gamma-ray Space Telescope
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