Multipole Analysis of IceCube Data to Search for Dark Matter Accumulated in the Galactic Halo

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dc.rights.license Attribution 4.0 International (CC BY 4.0) en_US
dc.contributor.author Santander, Marcos
dc.date.accessioned 2019-07-05T13:17:10Z
dc.date.available 2019-07-05T13:17:10Z
dc.date.issued 2015-01-20 en_US
dc.identifier.citation Aartsen, M. G., et al. (2015): Multipole Analysis of IceCube Data to Search for Dark Matter Accumulated in the Galactic Halo. The European Physical Journal C. DOI: https://doi.org/10.1140/epjc/s10052-014-3224-5 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5906
dc.description.abstract Dark matter which is bound in the Galactic halo might self-annihilate and produce a flux of stable final state particles, e.g. high energy neutrinos. These neutrinos can be detected with IceCube, a cubic-kilometer sized Cherenkov detector. Given IceCube’s large field of view, a characteristic anisotropy of the additional neutrino flux is expected. In this paper we describe a multipole method to search for such a large-scale anisotropy in IceCube data. This method uses the expansion coefficients of a multipole expansion of neutrino arrival directions and incorporates signal-specific weights for each expansion coefficient. We apply the technique to a high-purity muon neutrino sample from the Northern Hemisphere. The final result is compatible with the null-hypothesis. As no signal was observed, we present limits on the self-annihilation cross-section averaged over the relative velocity distribution 〈(σ_A)ν〉 down to 1.9 × 10⁻²³ cm³ s⁻¹ for a dark matter particle mass of 700–1,000 GeV and direct annihilation into νν̅. The resulting exclusion limits come close to exclusion limits from γ-ray experiments, that focus on the outer Galactic halo, for high dark matter masses of a few TeV and hard annihilation channels. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en_US
dc.subject Dark Matter en_US
dc.subject Systematic Uncertainty en_US
dc.subject Weakly Interact Massive Particle en_US
dc.subject Galactic Halo en_US
dc.subject Neutrino Flux en_US
dc.title Multipole Analysis of IceCube Data to Search for Dark Matter Accumulated in the Galactic Halo en_US
dc.type text en_US


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