English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We study the capabilities of the Fermi-LAT instrument on board of the Fermimission to constrain particle dark matter properties, as annihilation crosssection, mass and branching ratio into dominant annihilation channels, withgamma-ray observations from the galactic center. Besides the prompt gamma-rayflux, we also take into account the contribution from the electrons/positronsproduced in dark matter annihilations to the gamma-ray signal via inverseCompton scattering off the interstellar photon background, which turns out tobe crucial in the case of dark matter annihilations into mu+mu- and e+e- pairs.We study the signal dependence on different parameters like the region ofobservation, the density profile, the assumptions for the dark matter model andthe uncertainties in the propagation model. We also show the effect of theinclusion of a 20% systematic uncertainty in the gamma-ray background. IfFermi-LAT is able to distinguish a possible dark matter signal from the largegamma-ray background, we show that for dark matter masses below ~200 GeV,Fermi-LAT will likely be able to determine dark matter properties with goodaccuracy.

Constraining Dark Matter Properties with Gamma-Rays from the Galactic Center with Fermi-LAT