A Posterior Analysis on IceCube Double Pulse Tau Neutrino Candidates
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(Published version)
Date
2022
Authors
Tian, W.
Zhang, F.
Xu, D.
Abbasi, R.
Ackermann, M.
Adams, J.
Aguilar, J.A.
Ahlers, M.
Ahrens, M.
Alispach, C.
Editors
Keilhauer, B.
Kappes, A.
Kappes, A.
Advisors
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Conference paper
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Proceedings of Science, 2022 / Keilhauer, B., Kappes, A. (ed./s), vol.395, pp.1146-1-1146-11
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International Cosmic Ray Conference (ICRC) (12 Jul 2021 - 23 Jul 2021 : Berlin, Germany - Online)
Abstract
The IceCube Neutrino Observatory at the South Pole detects Cherenkov light emitted by charged secondary particles created by primary neutrino interactions. Double pulse waveforms can arise from charged current interactions of astrophysical tau neutrinos with nucleons in the ice and the subsequent decay of tau leptons. The previous 8-year tau double pulse analysis found three tau neutrino candidate events. Among them, the most promising one observed in 2014 is located very near the dust layer in the middle of the detector. A posterior analysis on this event will be presented in this paper, using a new ice model treatment with continuously varying nuisance parameters to do the targeted Monte Carlo re-simulation for tau and other background neutrino ensembles. The impact of different ice models on the expected signal and background statistics will also be discussed
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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)