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Publication Type: Journal article
Publication year: 2021
Book Volume: 16
Article Number: P08034
Journal Issue: 8
DOI: 10.1088/1748-0221/16/08/P08034
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.
APA:
Abbasi, R., Ackermann, M., Adams, J., Aguilar, J.A., Ahlers, M., Ahrens, M.,... Zhang, Z. (2021). A muon-track reconstruction exploiting stochastic losses for large-scale Cherenkov detectors. Journal of Instrumentation, 16(8). https://doi.org/10.1088/1748-0221/16/08/P08034
MLA:
Abbasi, R., et al. "A muon-track reconstruction exploiting stochastic losses for large-scale Cherenkov detectors." Journal of Instrumentation 16.8 (2021).
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