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Title

IceCube search for dark matter annihilation in nearby galaxies and galaxy clusters

CollaborationWith : Aguilar Sanchez, Juan / Christov, Asen / Montaruli, Teresa / Rameez, Mohamed / Vallecorsa, Sofia
Published in Physical Review. D. 2013, vol. 88, no. 12, p. 122001
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.
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ICECUBE COLLABORATION. IceCube search for dark matter annihilation in nearby galaxies and galaxy clusters. In: Physical Review. D, 2013, vol. 88, n° 12, p. 122001. https://archive-ouverte.unige.ch/unige:38992

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Deposited on : 2014-07-29

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