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T: Fachverband Teilchenphysik

T 58: Neutrinoastronomie 2

T 58.4: Talk

Tuesday, March 25, 2014, 17:30–17:45, P13

A multi-year search for a diffuse astrophysical muon neutrino flux with IceCube. — •Leif Rädel, Sebastian Schoenen, Jan Auffenberg, Jennifer Pütz, Anne Schukraft, and Christopher Wiebusch for the IceCube collaboration — III. Physikalisches Institut, RWTH Aachen, D-52056 Aachen

Recently, the IceCube Collaboration has reported strong evidence for an all-flavor, high-energy astrophysical neutrino flux. In order to identify the sources of this flux, high-energy muon neutrinos are ideal messenger particles because of their excellent angular resolution. However, the first step is to confirm the observed flux in the muon neutrino channel using multiple years of IceCube data. The main background for this search are cosmic-ray-induced atmospheric muon neutrinos. High-purity neutrino event samples will be analyzed by a two-dimensional likelihood approach, taking full advantage of the information of neutrino energies and arrival directions with a consistent treatment of systematic uncertainties. The sensitivity of this analysis will be substantially better than previous searches and allows to probe the reported flux of high-energy astrophysical neutrinos.