Visible and Dark Matter Genesis and Cosmic Positron/Electron Excesses

Details Visible and Dark Matter Genesis and Cosmic Positron/Electron Excesses Visible and Dark Matter Genesis and Cosmic Positron/Electron Excesses

2009-06-17

arxiv.org/abs/0906.3103v3

Phys.Rev.D80:076003,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures. Minor modification. Accepted by PRD

Scientific paper

10.1103/PhysRevD.80.076003

Dark and baryonic matter contribute comparable energy density to the present Universe. The dark matter may also be responsible for the cosmic positron/electron excesses. We connect these phenomena with Dirac seesaw for neutrino masses. In our model (i) the dark matter relic density is a dark matter asymmetry generated simultaneously with the baryon asymmetry so that we can naturally understand the coincidence between the dark and baryonic matter; (ii) the dark matter mostly decays into the leptons so that its decay can interpret the anomalous cosmic rays with positron/electron excesses.

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