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T: Fachverband Teilchenphysik
T 34: Neutrinoastronomie 1
T 34.8: Talk
Monday, March 24, 2014, 18:35–18:50, P13
The Impact of the Ice Model on Tau Neutrino Reconstruction in IceCube — •Marcel Usner1, Marek Kowalski1, and Jakob van Santen2 for the IceCube collaboration — 1Physikalisches Institut, Universität Bonn, 53115 Bonn, Deutschland — 2University of Wisconsin-Madison, Madison, WI, USA
The IceCube Neutrino Observatory at the South Pole is a Cherenkov detector with an instrumented volume of about one cubic kilometer of the Antarctic ice. Tau neutrinos can be measured via the Double Bang signature that links two subsequent cascades from the hadronic interaction and the tau decay. It can only be resolved at energies above 1 PeV where the decay length of the tau is about 50 m. Our best knowledge about the ice properties contains a tilt of the ice layers and an azimuthal anisotropy of the scattering coefficient in the direction of the glacier flow. These effects cannot be trivially incorporated into the existing reconstruction methods and can in fact cause a single cascade from the interaction of an electron neutrino to be misreconstructed as a Double Bang event. I will present a solution to this problem and discuss its effect on the reconstruction of tau neutrino events.