Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 8: Experimentelle Methoden der Astroteilchenphysik I

T 8.6: Talk

Monday, March 9, 2015, 15:20–15:35, I.13.70 (HS 27)

Evaluation of the astrophysical origin of a vertical high-energy neutrino event in IceCube using IceTop information — •Martin Stahlberg, Jan Auffenberg, Martin Rongen, Julian Kemp, Bengt Hansmann, Merlin Schaufel, and Christopher Wiebusch for the IceCube collaboration — RWTH Aachen, III. Physikalisches Institut B, Otto-Blumenthal-Straße, 52074 Aachen

A main goal of the IceCube neutrino observatory is the detection of high-energy astrophysical neutrinos. IceCube's surface detector component IceTop is an array of 81 stations comprised of two Cherenkov-light detecting tanks, each of which is filled with clear ice and contains two photomultiplier modules. IceTop allows for the detection of cosmic-ray induced air-showers above energies of a few 100 TeV. In addition, the atmospheric origin of neutrino events detected with IceCube can be verified by the observation of a coincident air-shower component on the surface with IceTop. In 2014, a vertically down-going high-energy muon neutrino event starting in IceCube has been observed. The astrophysical origin of this event is tested by a close examination of the IceTop data. The outcome of this analysis is used to assess the potential of the proposed IceTop extension, IceVeto, which further increases the geometrical acceptance of the surface detector.