Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 46: Neutrino Astronomy 2
T 46.2: Vortrag
Dienstag, 22. März 2022, 16:30–16:45, T-H31
The energy spectrum of the diffuse neutrino flux in a combined fit using 10 years of IceCube data — •Richard Naab1, Erik Ganster2, Markus Ackermann1, and Christopher Wiebusch2 for the IceCube collaboration — 1DESY, Zeuthen, Germany — 2Physics Institute III B, RWTH Aachen University, Germany
The IceCube Neutrino Observatory has discovered a diffuse astrophysical neutrino flux and measures the energy spectrum and flavor composition in different detection channels. With almost 10 years of data, we aim to combine different detection channels to constrain this energy spectrum and flavor composition with unprecedented precision. The increased statistics require rigorous treatment of systematic uncertainties, which we aim to achieve with the so-called SnowStorm method, recently developed within the IceCube collaboration. This technique involves a continuous variation of systematics parameters during the detector simulation and requires a dedicated analysis approach.
In this work, we present the validation of this method for the purpose of measuring the energy spectrum, using two distinct analysis approaches. Furthermore, we discuss the sensitivity of an upcoming analysis combining the detection channels of tracks and cascades.