Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 67: Neutrino astronomy III
T 67.4: Vortrag
Mittwoch, 17. März 2021, 16:45–17:00, Tq
Future Sensitivity of the Astrophysical Neutrino Flux Measurement in IceCube: Improved Energy Estimation and Uncertainties — •Philipp Fürst1, Jakob Böttcher1, Erik Ganster1, Christian Haack2, Jöran Stettner1, and Christopher Wiebusch1 for the IceCube collaboration — 1RWTH Aachen University - Physics Institute III B, Aachen, Germany — 2TU München
The IceCube Neutrino Observatory has measured a diffuse flux of high-energy astrophysical neutrinos in multiple detection channels. We focus on the channel of neutrino-induced muon tracks where the astrophysical signal is measured by an excess of high-energy events above the background of atmospheric neutrinos. The uncertainty of such a measurement depends on the systematic uncertainties of the detector and background predictions, and particularly on the resolution of the energy estimate of the muon in the detector. Several methods for the energy estimation already exist - here, we present a new energy estimator with increased resolution which is based on a combination of these previous estimation methods. We present possible sensitivity gains from increasing the energy resolution and compare them to the influence of the other systematic uncertainties. Combining all this information with increased detector livetime, we give an outlook towards feasible future sensitivity gains.