Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 80: Dunkle Materie 4 (indirekte Suche)

T 80.6: Talk

Wednesday, March 26, 2014, 18:00–18:15, P11

Results of the Search for Dark Matter in the Galactic Halo with a Multipole Analysis of IceCube Data — •René Reimann, Kai-Fabian Bindel, Martin Bissok, Martin Leuermann, Anne Schukraft, and Christopher Wiebusch for the IceCube collaboration — III. Physikalisches Institut, RWTH Aachen, D-52056 Aachen

Self-annihilating or decaying Dark Matter in the galactic halo may contribute to the observable flux of cosmic high-energy neutrinos. These neutrinos can be detected with the IceCube Neutrino Observatory, a cubic-kilometer-sized Cherenkov detector at the Geographic South Pole. The neutrino flux depends on the density of Dark Matter in the direction of sight and is expected to be larger in the direction of the galactic center and smaller in the direction of the anti-center. Given the large field of view of IceCube, such a large-scale anisotropy would leave a characteristic imprint on multipole expansion coefficients of the observed set of arrival directions in a high-purity muon neutrino event sample. We present an analysis of data taken with the IceCube 79-string configuration, using up-going neutrinos from the Northern hemisphere. This analysis improves in sensitivity compared to previous IceCube analyses. The results are interpreted in terms of the thermally averaged self-annihilation cross-section of dark-matter particles.