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|Title:||IceCube search for dark matter annihilation in nearby galaxies and galaxy clusters|
Becker Tjus, J.
|Citation:||Physical Review D - Particles, Fields, Gravitation, and Cosmology, 2013; 88(12):122001 -1-122001 -10|
|Publisher:||American Physical Society|
|M. G. Aartsen ... G. C. Hill ... et al. (IceCube Collaboration)|
|Abstract:||We present the results of a first search for self-annihilating dark matter in nearby galaxies and galaxy clusters using a sample of high-energy neutrinos acquired in 339.8 days of live time during 2009/10 with the IceCube neutrino observatory in its 59-string configuration. The targets of interest include the Virgo and Coma galaxy clusters, the Andromeda galaxy, and several dwarf galaxies. We obtain upper limits on the cross section as a function of the weakly interacting massive particle mass between 300 GeV and 100 TeV for the annihilation into bb¯, W+W−, τ+τ−, μ+μ−, and νν¯. A limit derived for the Virgo cluster, when assuming a large effect from subhalos, challenges the weakly interacting massive particle interpretation of a recently observed GeV positron excess in cosmic rays.|
|Rights:||© 2013 American Physical Society|
|Appears in Collections:||Chemistry and Physics publications|
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