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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2108.05504 (astro-ph)
[Submitted on 12 Aug 2021]

Title:Posterior Analysis on IceCube Double Pulse Tau Neutrino Candidates

Authors:Wei Tian, Fuyudi Zhang, Donglian Xu (for the IceCube Collaboration)
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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.
Comments: Presented at the 37th International Cosmic Ray Conference (ICRC 2021). See arXiv:2107.06966 for all IceCube contributions
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Report number: PoS-ICRC2021-1146
Cite as: arXiv:2108.05504 [astro-ph.HE]
  (or arXiv:2108.05504v1 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2108.05504

Submission history

From: Wei Tian [view email]
[v1] Thu, 12 Aug 2021 02:34:35 UTC (2,872 KB)
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