Speaker
Iris Gebauer
(Universitaet Karlsruhe)
Description
The EGRET excess of diffuse Galactic gamma rays shows all the features
expected from dark matter annihilation (DMA): a spectral shape
given by the fragmentation of mono-energetic quarks, which is the same in all sky
directions and an intensity distribution of the excess expected
from a standard dark matter halo, predicted by the rotation curve.
From the EGRET excess one can predict the flux of antiprotons
from DMA. However, how many antiprotons arrive at the detector depends
strongly on the propagation model. The simplest isotropic propagation
models trap the anitprotons in the Galaxy, which leads to a local
anitproton flux far above the observed flux. According to Bergstrom et al. this
excludes the DMA interpretation of the EGRET excess. Here it is shown that more
realistic anisotropic propagation
models, in which most antiprotons escape by convection, are consistent
with the B/C ratio, the antiproton flux and the EGRET excess from DMA.
Author
Iris Gebauer
(Universitaet Karlsruhe)
Co-authors
Dr
Christian Sander
(Univ. Hamburg)
Prof.
Dmitri Kazakov
(JINR, Dubna)
Markus Weber
(Univ. Karlsruhe)
Dr
Valery Zhukov
(Univ. Karlsruhe)
Prof.
Wim de Boer
(Univ. Karlsruhe)
