Mathematics – Logic
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.3701w&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #37.01; Bulletin of the American Astronomical Society, V
Mathematics
Logic
Scientific paper
The LAT collaboration Dark Matter and New Physics Working group has been developing approaches for the indirect detection of in situ annihilation of dark matter. Our work has assumed that a significant component of dark matter is a new type of Weakly Interacting Massive Particle (WIMP). The pair annihilation of WIMPs results in the production of high energy gamma rays (E > 1 GeV) that can be well measured in the GLAST LAT. These searches involve strategies for observation of the galactic center, galactic halo (optimized diffuse all sky analysis), galactic satellites (high latitude slightly extended sources), and cosmological signals in the extragalactic diffuse. The spectra of these potential signals are non-powerlaw, considerably harder than most astrophysical sources, and have an endpoint at the mass of the WIMP. In addition, there is the possibility to observe lines from annihilation into γ-γ and/or γ-Z0 final states. The estimates of LAT sensitivity depend upon the WIMP model, the dark matter halo model, and various astrophysics backgrounds. Thus estimates of LAT sensitivity can vary over orders of magnitude depending on the astrophysical search region and which particle dark matter models are chosen. Conversely, if particle dark matter is observed, a new observational window can be opened upon galactic dark matter substructure. Preparations for these searches and other types of new physics searches will be presented.
GLAST LAT Collaboration
Wai Lawrence L.
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