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https://hdl.handle.net/2440/101385
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Type: | Journal article |
Title: | Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo |
Author: | Aartsen, M. Ackermann, M. Adams, J. Aguilar, J. Ahlers, M. Ahrens, M. Altmann, D. Anderson, T. Arguelles, C. Arlen, T. Auffenberg, J. Bai, X. Barwick, S. Baum, V. Beatty, J. Becker Tjus, J. Becker, K. BenZvi, S. Berghaus, P. Berley, D. et al. |
Citation: | European Physical Journal C: Particles and Fields, 2015; 75(1):20-1-20-16 |
Publisher: | Springer Berlin Heidelberg |
Issue Date: | 2015 |
ISSN: | 1434-6044 1434-6052 |
Statement of Responsibility: | M. G. Aartsen ... G. C. Hill ... S. Robertson ... B. J. Whelan ... et al. (IceCube Collaboration) |
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 ⟨σΑv⟩ down to 1.9×10¯²³cm³s¯¹ for a dark matter particle mass of 700–1,000 GeV and direct annihilation into νν¯. 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. |
Rights: | © The Author(s) 2015. This article is published with open access at Springerlink.com |
DOI: | 10.1140/epjc/s10052-014-3224-5 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1140/epjc/s10052-014-3224-5 |
Appears in Collections: | Aurora harvest 3 Chemistry and Physics publications |
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