Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2009/07/001
Keywords
dark matter theory; cosmology of theories beyond the SM; cosmic ray theory
Funding
- European Comission [MRTN-2006-035863, MRTN-CT2006-035482]
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We explain the PAMELA positron excess and the PPB-BETS/ATIC e(+)+ e(-) data using a simple two component dark sector model (2CDS). The two particle species in the dark matter sector are assumed to be in thermal equilibrium in the early universe. While one particle is stable and is the present day dark matter, the second one is metastable and decays after the universe is 10(-8) s old. In this model it is simple to accommodate the large boost factors required to explain the PAMELA positron excess without the need for large spikes in the local dark matter density. We provide the constraints on the parameters of the model and comment on possible signals at future colliders.
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