Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-01-16
JCAP 0904:014,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages ; v2: matches JCAP published version
Scientific paper
10.1088/1475-7516/2009/04/014
In the framework of the Inert Doublet Model, a very simple extension of the Standard Model, we study the production and propagation of antimatter in cosmic rays coming from annihilation of a scalar dark matter particle. We consider three benchmark candidates, all consistent with the WMAP cosmic abundance and existing direct detection experiments, and confront the predictions of the model with the recent PAMELA, ATIC and HESS data. For a light candidate, M_{DM} = 10 GeV, we argue that the positron and anti-proton fluxes may be large, but still consistent with expected backgrounds, unless there is an enhancement (boost factor) in the local density of dark matter. There is also a substantial anti-deuteron flux which might be observable by future experiments. For a candidate with M_{DM} = 70 GeV, the contribution to positron and anti-proton fluxes is much smaller than the expected backgrounds. Even if a boost factor is invoked to enhance the signals, the candidate is unable to explain the observed positron and anti-proton excesses. Finally, for a heavy candidate, M_{DM} = 10 TeV, it is possible to fit the PAMELA excess (but, unfortunately, not the ATIC one) provided there is a large enhancement, either in the local density of dark matter or through the Sommerfeld effect.
Nezri Emmanuel
Tytgat Michel H. G.
Vertongen Gilles
No associations
LandOfFree
Positrons and antiprotons from inert doublet model dark matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Positrons and antiprotons from inert doublet model dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positrons and antiprotons from inert doublet model dark matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-127951