Is the dark matter interpretation of the EGRET gamma excess compatible with antiproton measurements?

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dc.creatorBergstrom, Lars
dc.creatorEdsjo, Joakim
dc.creatorGustafsson, Michael
dc.creatorSalati, Pierre
dc.date2006-02-28
dc.date2006-08-29
dc.date.accessioned2026-07-07T07:00:55Z
dc.date.available2026-07-07T07:00:55Z
dc.descriptionWe investigate the internal consistency of the halo dark matter model which has been proposed by de Boer et al. to explain the excess of diffuse galactic gamma rays observed by the EGRET experiment. Any model based on dark matter annihilation into quark jets, such as the supersymmetric model proposed by de Boer et al., inevitably also predicts a primary flux of antiprotons from the same jets. Since propagation of the antiprotons in the unconventional, disk-dominated type of halo model used by de Boer et al. is strongly constrained by the measured ratio of boron to carbon nuclei in cosmic rays, we investigate the viability of the model using the DarkSUSY package to compute the gamma-ray and antiproton fluxes. We are able to show that their model is excluded by a wide margin from the measured flux of antiprotons. We therefore find that a model of the type suggested by Moskalenko et al., where the intensities of protons and electrons in the cosmic rays vary with galactic position, is far more plausible to explain the gamma excess.
dc.description14 pages, 5 figures. Matches published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0602632
dc.identifierhttp://arxiv.org/abs/astro-ph/0602632
dc.identifierJCAP 0605 (2006) 006
dc.identifierdoi:10.1088/1475-7516/2006/05/006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108126
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleIs the dark matter interpretation of the EGRET gamma excess compatible with antiproton measurements?
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