Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis

Details Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis

2009-01-23

arxiv.org/abs/0901.3582v3

Phys.Rev.D79:083522,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 5 figures; added references; corrected the electromagnetic-emission part and got milder constraint from the photod

Scientific paper

10.1103/PhysRevD.79.083522

Recent measurements of cosmic-ray electron and positron fluxes by PAMELA and ATIC experiments may indicate the existence of annihilating dark matter with large annihilation cross section. We show that the dark matter annihilation in the big-bang nucleosynthesis epoch affects the light element abundances, and it gives stringent constraints on such annihilating dark matter scenarios for the case of hadronic annihilation. Constraints on leptonically annihilating dark matter models are less severer.

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