Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 75, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-014-3224-5
Keywords
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Categories
Funding
- US National Science Foundation-Office of Polar Programs
- US National Science Foundation-Physics Division
- University of Wisconsin Alumni Research Foundation
- Grid Laboratory of Wisconsin (GLOW) grid infrastructure at the University of Wisconsin-Madison
- Open Science Grid (OSG) grid infrastructure
- US Department of Energy
- National Energy Research Scientific Computing Center, the Louisiana Optical Network Initiative (LONI)
- Natural Sciences and Engineering Research Council of Canada
- West-Grid and Compute/Calcul Canada
- Swedish Research Council
- Swedish Polar Research Secretariat
- Swedish National Infrastructure for Computing (SNIC)
- Knut and Alice Wallenberg Foundation, Sweden
- German Ministry for Education and Research (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Helmholtz Alliance for Astroparticle Physics (HAP)
- Research Department of Plasmas with Complex Interactions (Bochum), Germany
- Fund for Scientific Research (FNRS-FWO)
- FWO Odysseus programme
- Flanders Institute to encourage scientific and technological research in industry (IWT), Belgian Federal Science Policy Office (Belspo)
- University of Oxford, UK
- Marsden Fund, New Zealand
- Australian Research Council
- Japan Society for Promotion of Science (JSPS)
- Swiss National Science Foundation (SNSF), Switzerland
- National Research Foundation of Korea (NRF)
- Danish National Research Foundation, Denmark (DNRF)
- STFC [ST/L000474/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L000474/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien [1307472] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1210052, 1205403] Funding Source: National Science Foundation
- Division Of Physics [1307472] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1306958, 1205796, 1403586] Funding Source: National Science Foundation
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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 down to 1.9x10(-23) cm(3) s(-1) for a dark matter particle mass of 700-1,000 GeV and direct annihilation into nu(nu) over bar. The resulting exclusion limits come close to exclusion limits from gamma-ray experiments, that focus on the outer Galactic halo, for high dark matter masses of a few TeV and hard annihilation channels.
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