Work

Dark matter with a late decaying dark partner

Year: 2009

Type: article

Abstract: 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.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2009/07/001

Authors: Malcolm Fairbairn, Jure Zupan

Institutions: King's College London, European Organization for Nuclear Research, University of Ljubljana, Jožef Stefan Institute

Language: English

Topic: Dark Matter and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: European Commission

Award: G415857248