Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.221301
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Funding
- Low Energy Electron and Positron Propagation'' PICS
- Science and Technology Facilities Council [ST/H002456/1] Funding Source: researchfish
- STFC [ST/H002456/1] Funding Source: UKRI
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Recent results from the PAMELA, ATIC, FERMI and HESS experiments have focused attention on the possible existence of high energy cosmic rays e(+) e(-) that may originate from dark matter annihilations or decays in the Milky Way. Here we examine the morphology of the associated gamma-ray emission after propagation of the electrons generated by both annihilating and decaying dark matter models. We focus on photon energies of 1, 10, and 50 GeV(relevant for the FERMI satellite) and consider different propagation parameters. Our main conclusion is that distinguishing annihilating from decaying dark matter may only be possible if the propagation parameters correspond to the most optimistic diffusion models. In addition, we point to examples where morphology can lead to an erroneous interpretation of the source injection energy.
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