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T: Fachverband Teilchenphysik

T 16: Neutrino Astronomy I

T 16.5: Vortrag

Montag, 20. März 2023, 17:30–17:45, POT/0112

Applications of an improved track reconstruction algorithm in IceCube — •Sofia Athanasiadou for the IceCube collaboration — DESY, Zeuthen, Germany

The IceCube Neutrino Observatory, the world's largest neutrino telescope, has detected neutrinos in spatial and time coincidence with AGN, providing strong evidence that these astrophysical objects can in fact be neutrino sources. Neutrinos of astrophysical origin can be discerned from the atmospheric background at energies above 100 TeV, and for point-source studies in particular, high-energy track-like events are preferred. In this energy regime, the stochastic energy losses of the neutrino-induced muons are the dominant source of Cherenkov light measured by the detector, thus it is essential to include them in our reconstruction methods. The SegmentedSpline reconstruction algorithm incorporates stochastic losses into the energy loss pattern while performing an energy fit as a first step, which significantly improves on the subsequent track reconstruction step and the angular resolution achieved. In this work we present our results when the algorithm is run on a subsample of simulated events for validation purposes, and our plans for implementation on IceCube data for a point-source search study.