Positrons from dark matter annihilation in the galactic halo: Theoretical uncertainties
By T. Delahaye, R. Lineros, F. Donato, N. Fornengo, P. S. LAPTHAnnecy, CNRS-SPM, 9. Universite'deSavoie, U. Torino, INFNTorino. 2007
253 citations recorded by the source corpus.
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 find dark matter scenarios and propagation models that nicely fit existing data on the positron fraction. Finally, we present predictions both on the positron fraction and on the flux for already running or planned space experiments, concluding that they have the potential to discriminate a possible signal from the background and, in some cases, to distinguish among different astrophysical propagation models.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/3947e39c0a0d8b8910617ab74070b7aaa480326b
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Citations in the corpus
- On possible interpretations of the high energy electron–positron spectrum measured by the Fermi Large Area Telescope (2009, background): “The discrepancy moderates only if one considers a very steep injection index for electrons (Delahaye et al. 2008 [61]).”
- Galactic secondary positron flux at the Earth (2008, methodology): “When the radial boundary is taken into account, one has to use an expansion over Bessel functions (Bulanov & Dogel 1974; Delahaye et al. 2008).”
- A Markov Chain Monte Carlo technique to sample transport and source parameters of Galactic cosmic rays - II. Results for the diffusion model combining B/C and radioactive nuclei (2010, methodology): “It has also been used to set constraints on dark matter annihilations in antinuclei (Donato et al. 2004), and positrons (Delahaye et al. 2008b).”
- Dissecting cosmic-ray electron-positron data with Occam’s razor: the role of known pulsars (2008, unknown): “[4] T. Delahaye et al. (2008), 0809.5268.”
- Galactic electrons and positrons at the Earth: new estimate of the primary and secondary fluxes (2010, methodology): “We accounted for it using the image method for the radial component, or, since the smooth source term exhibits a cylindrical symmetry, by expanding the solution in terms of Bessel series (see e.g. Bulanov & Dogel 1974; Berezinskii et al. 1990; Delahaye et al. 2008).”