Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis
High Energy Physics - Phenomenology
2010-04-21 v3 Cosmology and Nongalactic Astrophysics
High Energy Astrophysical Phenomena
Abstract
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.
Cite
@article{arxiv.0901.3582,
title = {Cosmic Rays from Dark Matter Annihilation and Big-Bang Nucleosynthesis},
author = {Junji Hisano and Masahiro Kawasaki and Kazunori Kohri and Takeo Moroi and Kazunori Nakayama},
journal= {arXiv preprint arXiv:0901.3582},
year = {2010}
}
Comments
21 pages, 5 figures; added references; corrected the electromagnetic-emission part and got milder constraint from the photodissociation processes by a factor of 50 (v3)