# A muon-track reconstruction exploiting stochastic losses for large-scale Cherenkov detectors

Abbasi, R.; Ackermann, M.; Adams, J.; Aguilar, J.A.; Ahlers, M.; Ahrens, M.; Alispach, C.; Alves, A.A., Jr.; Amin, N.M.; An, R.; Andeen, K.; Anderson, T.; Ansseau, I.; Anton, G.; Argüelles, C.; Axani, S.; Bai, X.; Balagopal V., A.; Barbano, A.; Barwick, S.W.; ... mehr

##### Abstract:
IceCube is a cubic-kilometer Cherenkov telescope operating at the South Pole. The main goal of IceCube is the detection of astrophysical neutrinos and the identification of their sources. High-energy muon neutrinos are observed via the secondary muons produced in charge current interactions with nuclei in the ice. Currently, the best performing muon track directional reconstruction is based on a maximum likelihood method using the arrival time distribution of Cherenkov photons registered by the experiment's photomultipliers. A known systematic shortcoming of the prevailing method is to assume a continuous energy loss along the muon track. However at energies >1 TeV the light yield from muons is dominated by stochastic showers. This paper discusses a generalized ansatz where the expected arrival time distribution is parametrized by a stochastic muon energy loss pattern. This more realistic parametrization of the loss profile leads to an improvement of the muon angular resolution of up to 20% for through-going tracks and up to a factor 2 for starting tracks over existing algorithms. Additionally, the procedure to estimate the directional reconstruction uncertainty has been improved to be more robust against numerical errors.

 Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP) Publikationstyp Zeitschriftenaufsatz Publikationsmonat/-jahr 08.2021 Sprache Englisch Identifikator ISSN: 1748-0221 KITopen-ID: 1000139530 Erschienen in Journal of Instrumentation Verlag IOP Publishing Band 16 Heft 08 Seiten Art. Nr.: P08034 Vorab online veröffentlicht am 12.08.2021 Schlagwörter Cherenkov detectors; Neutrino detectors; Data analysis Nachgewiesen in Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page