UNIGE document Scientific Article
previous document  unige:55743  next document
add to browser collection
Title

Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo

CollaborationWith : Aguilar, J. A. / Christov, Asen / Montaruli, Teresa / Rameez, Mohamed / Vallecorsa, Sofia
Published in European Physical Journal. C. 2015, vol. 75, no. 1, p. 20
Collection Open Access - SCOAP3
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 ⟨σAv⟩ 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.
Identifiers
Full text
Structures
Citation
(ISO format)
ICECUBE COLLABORATION. Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo. In: European Physical Journal. C, 2015, vol. 75, n° 1, p. 20. https://archive-ouverte.unige.ch/unige:55743

185 hits

33 downloads

Update

Deposited on : 2015-04-27

Export document
Format :
Citation style :