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T: Fachverband Teilchenphysik

T 106: Suche nach Dunkler Materie 4

T 106.3: Vortrag

Donnerstag, 30. März 2017, 17:20–17:35, VSH 19

Search for Decaying Dark Matter with Astrophysical Muon Neutrinos Measured by IceCube — •Jöran Stettner, Theo Glauch, Christian Haack, René Reimann, Leif Rädel, Sebastian Schoenen, and Christopher Wiebusch for the IceCube collaboration — III. Physikalisches Institut, RWTH Aachen

The discovery of astrophysical neutrinos up to PeV energies by IceCube has triggered intense interest in possible explanations of their origin. One possibility besides astrophysical sources is a top-down scenario, namely the decay of a dark matter particle with mass of the order of PeV. We present an analysis of 6 years (2009-14) of muon neutrino events observed by IceCube from the northern hemisphere. In a three-dimensional template fit of energy and direction, the components contributing to the total neutrino flux are disentangled. These are atmospheric neutrinos, an isotropic astrophysical flux following a power-law energy spectrum and a flux from decaying dark matter. The dark matter signal would exhibit a clear signature in the arrival directions due to the shape of the galactic dark matter halo and in the energy spectrum. Results of the fit are constraints on the dark matter parameters, namely on the mass and lifetime of the DM-particle.