Other
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.0504b&link_type=abstract
American Astronomical Society, HEAD meeting #12, #5.04
Other
Scientific paper
Future ground-based gamma-ray instruments consisting of large arrays of imaging atmospheric Cherenkov detectors will provide a powerful and unique tool for determining the nature of dark matter and its role in structure formation in the universe. These measurements are complimentary to other methods, probing parameter space inaccessible to direct detection (if the nuclear recoil cross section is too small) or the LHC (sensitive to neutralinos up to a maximum energy of about 600 GeV). Gamma-ray production is closely linked to the total annihilation cross section responsible for the relic abundance, yielding a robust prediction for the detection cross section. These measurements will provide the only means for mapping the dark matter in the halo of our galaxy and other galaxies. In addition, the spectrum of gamma-rays will be imprinted with the mass of the dark matter particle and sensitive to the branching ratios for different annihilation channels providing key data needed to identify the properties of the dark matter particles. We show that the planned CTA array will have the angular resolution, energy resolution, low threshold energy and large effective area required to detect emission from dark matter annihilation in the Galactic Center region or nearby Dwarf spheroidal galaxies for generic parameters for the halo distribution and annihilation cross section.
Buckley James H.
CTA Consortium
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