Hamburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 103: Neutrinoastronomie V

T 103.3: Vortrag

Donnerstag, 3. März 2016, 17:20–17:35, VMP9 SR 08

Observation and characterization of an astrophysical muon neutrino flux from the Northern Hemisphere with IceCube — Christian Haack, •Leif Rädel, René Reimann, Sebastian Schoenen, and Christopher Wiebusch for the IceCube collaboration — 3. Physikalisches Institut B, RWTH Aachen

IceCube has observed a high-energy astrophysical neutrino flux based on neutrinos of all flavors interacting within the instrumented volume. Here, a complementary measurement based on muon neutrinos where the interaction vertex can be outside the instrumented volume is presented. Due to the large muon range the effective area is significantly larger but the field of view is limited to the Northern Hemisphere. IceCube data from 2009 through 2015 have been analyzed by a likelihood approach with reconstructed muon energy and zenith angle as observables. The analyzed data consist of about 340,000 muon neutrinos with a negligible background of atmospheric muons. The majority of these events are atmospheric neutrinos. However, this analysis finds a significant astrophysical contribution, excluding the atmospheric-only hypothesis at the level of 6 standard deviations. In this talk we will present the analysis results including the characterization of the astrophysical flux properties.