Antimatter signals of singlet scalar dark matter

Details Antimatter signals of singlet scalar dark matter Antimatter signals of singlet scalar dark matter

2009-09-15

arxiv.org/abs/0909.2799v2

JCAP 0912:008,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 8 figures. v2: minor improvements. Accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2009/12/008

We consider the singlet scalar model of dark matter and study the expected antiproton and positron signals from dark matter annihilations. The regions of the viable parameter space of the model that are excluded by present data are determined, as well as those regions that will be probed by the forthcoming experiment AMS-02. In all cases, different propagation models are investigated, and the possible enhancement due to dark matter substructures is analyzed. We find that the antiproton signal is more easily detectable than the positron one over the whole parameter space. For a typical propagation model and without any boost factor, AMS-02 will be able to probe --via antiprotons-- the singlet model of dark matter up to masses of 600 GeV. Antiprotons constitute, therefore, a promising signal to constraint or detect the singlet scalar model.

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