Constraints on the Galactic Dark Matter signal from the Fermi-LAT measurement of the diffuse gamma-ray emission
We study diffuse gamma-ray emission at intermediate Galactic latitudes measured by the Fermi Large Area Telescope with the aim of searching for a signal from dark matter annihilation or decay. In the absence of a robust dark matter signal, constraints are presented. We set both, conservative dark matter limits requiring that the dark matter signal does not exceed the observed diffuse gamma-ray emission and limits derived based on modeling the foreground astrophysical diffuse emission. Uncertainties in several parameters which characterize conventional astrophysical emission are taken into account using a profile likelihood formalism. The resulting limits impact the range of particle masses over which dark matter thermal production in the early Universe is possible, and challenge the interpretation of the PAMELA/Fermi-LAT cosmic ray anomalies as annihilation of dark matter.
2012
2016-04-28 12:34:59
1033
gamma rays, Galactic diffuse emission, dark matter serach
r6
Fermi LAT Collaboration
260
Gabrijela
Zaharijas
70
COBISS_ID
3
4283643
DOI
15
http://www.slac.stanford.edu/econf/C121028/arXiv_PDF_files/33-zaharijas-1304.2547v1.pdf
NUK URN
18
URN:SI:UNG:REP:LXYS8MQ3
33-zaharijas-1304.2547v1_FermiSymposiumProceedings.pdf
1484584
Predstavitvena datoteka
2016-04-28 12:35:28
0
Izvorni URL
2016-04-28 12:34:59