e+and p from inert doublet model dark matter

2009/01/31 by E. Nezri, Emmanuel Nezri, Michel H. G. Tytgat +1 · 2 citations
Physics and Astronomy · #Annihilation #Astrophysics #CMB cold spot #Cosmic microwave background #Cosmic ray #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Electron #Light dark matter #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Positron #Scalar field dark matter #astro-ph.CO #hep-ph

paper · pdf · doi:10.1088/1475-7516/2009/04/014

published as JCAP 0904:014,2009 · 17 pages ; v2: matches JCAP published version

openalex publication_date 2009/04/17 · arxiv created 2009/05/06 · arxiv updated 2009/12/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/06

Abstract

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 e + and 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 e + and 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.

Citations

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Cited by

• H→γγin the inert Higgs doublet model
• Radiative neutrino mass model with degenerate right-handed neutrinos