Gravitational Dark Matter Decay and the ATIC/PPB-BETS Excess

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dc.creatorTakahashi, Fuminobu
dc.creatorKomatsu, Eiichiro
dc.date2009-01-14
dc.date.accessioned2026-07-07T12:32:51Z
dc.date.available2026-07-07T12:32:51Z
dc.descriptionThe hidden scalar field, which couples to the visible sector only through Planck-suppressed interactions, is a candidate for dark matter owing to its long lifetime. Decay of such a scalar field offers observational tests of this scenario. We show that decay of the hidden scalar field can explain the observed excess of high-energy positrons/electrons observed by ATIC/PPB-BETS, for a suitable choice of the mass and the vacuum expectation value of the field. We also show that the same choice of the parameters gives the observed dark matter abundance. Such a remarkable coincidence suggests that the Planck-suppressed interactions may be responsible for the observed excess in the cosmic-ray positrons/electrons.
dc.description11 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/0901.1915
dc.identifierhttp://arxiv.org/abs/0901.1915
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216925
dc.subjectCosmology and Nongalactic Astrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleGravitational Dark Matter Decay and the ATIC/PPB-BETS Excess
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