Positrons from dark matter annihilation in the galactic halo: uncertainties

Details Positrons from dark matter annihilation in the galactic halo: uncertainties Positrons from dark matter annihilation in the galactic halo: uncertainties

2007-09-13

arxiv.org/abs/0709.2078v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, Proc. of the 30th International Cosmic Ray Conference, July 3 - 11, 2007, Merida, Yucatan, Mexico (ICRC07)

Scientific paper

Indirect detection signals from dark matter annihilation are studied in the positron channel. We discuss in detail the positron propagation inside the galactic medium: we present novel solutions of the diffusion and propagation equations and we focus on the determination of the astrophysical uncertainties which affect the positron dark matter signal. We show that, especially in the low energy tail of the positron spectra at Earth, the uncertainty is sizeable and we quantify the effect. Comparison of our predictions with current available and foreseen experimental data are derived.

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