Dark matter and pulsar signals for Fermi LAT, PAMELA, ATIC, HESS and WMAP data.

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Phys. Lett. B

DOI:https://doi.org/10.1016/j.physletb.2009.06.030· OSTI ID:971973

Barger, V; Gao, Y; Keung, W -Y; Marfatia, D; Shaughnessy, G

We analyze new diffuse gamma-ray data from the Fermi Gamma-ray Space Telescope, which do not confirm an excess in the EGRET data at galactic mid-latitudes, in combination with measurements of electron and positron fluxes from PAMELA, Fermi and HESS within the context of three possible sources: dark matter (DM) annihilation or decay into charged leptons, and a continuum distribution of pulsars. We allow for variations in the backgrounds, consider several DM halo profiles, and account for systematic uncertainties in data where possible. We find that all three scenarios represent the data well. The pulsar description holds for a wide range of injection energy spectra. We compare with ATIC data and the WMAP haze where appropriate, but do not fit these data since the former are discrepant with Fermi data and the latter are subject to large systematic uncertainties. We show that for cusped halo profiles, Fermi could observe a spectacular gamma-ray signal of DM annihilation from the galactic center while seeing no excess at mid-latitudes.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF; Wisconsin Alumni Research Association
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 971973
• Report Number(s): ANL-HEP-PR-09-18
• Journal Information: Phys. Lett. B, Journal Name: Phys. Lett. B Journal Issue: 2009 Vol. 678; ISSN PYLBAJ; ISSN 0370-2693
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANNIHILATION
DECAY
DISTRIBUTION
ELECTRONS
ENERGY SPECTRA
LEPTONS
NONLUMINOUS MATTER
POSITRONS
PULSARS