First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition
The IceCube Neutrino Observatory at the South Pole, which detects Cherenkov light from charged particles produced in neutrino interactions, firmly established the existence of an astrophysical high-energy neutrino component. The expected neutrino flavor composition on Earth is $ν_e:ν_μ:ν_τ$ of about...
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ftdatacite:10.48550/arxiv.1908.05506 2023-05-15T18:22:44+02:00 First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition Stachurska, Juliana 2019 https://dx.doi.org/10.48550/arxiv.1908.05506 https://arxiv.org/abs/1908.05506 unknown arXiv arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Experiment hep-ex FOS Physical sciences Article CreativeWork article Preprint 2019 ftdatacite https://doi.org/10.48550/arxiv.1908.05506 2022-03-10T16:27:39Z The IceCube Neutrino Observatory at the South Pole, which detects Cherenkov light from charged particles produced in neutrino interactions, firmly established the existence of an astrophysical high-energy neutrino component. The expected neutrino flavor composition on Earth is $ν_e:ν_μ:ν_τ$ of about 1:1:1 for neutrinos produced in astrophysical sources through pion decay. A measurement of the flavor composition on Earth can provide important constraints on sources and production mechanisms within the standard model, and can also constrain various beyond-standard-model processes. Here the measurement of the flavor composition performed on IceCube's High-Energy Starting Events sample with a livetime of about 7.5 years is presented. IceCube is directly sensitive to each neutrino flavor via the single cascade, track and double cascade event topologies. In IceCube, $ν_τ$-CC interactions above $\sim$ 100 TeV can produce resolvable double cascades, breaking the degeneracy between $ν_e$ and $ν_τ$ present at lower energies. IceCube's first two identified double cascades are presented and the properties of the two $ν_τ$ candidates are discussed. : Presented at the 36th International Cosmic Ray Conference (ICRC 2019). See arXiv:1907.11699 for all IceCube contributions Article in Journal/Newspaper South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Experiment hep-ex FOS Physical sciences |
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High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Experiment hep-ex FOS Physical sciences Stachurska, Juliana First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition |
topic_facet |
High Energy Astrophysical Phenomena astro-ph.HE High Energy Physics - Experiment hep-ex FOS Physical sciences |
description |
The IceCube Neutrino Observatory at the South Pole, which detects Cherenkov light from charged particles produced in neutrino interactions, firmly established the existence of an astrophysical high-energy neutrino component. The expected neutrino flavor composition on Earth is $ν_e:ν_μ:ν_τ$ of about 1:1:1 for neutrinos produced in astrophysical sources through pion decay. A measurement of the flavor composition on Earth can provide important constraints on sources and production mechanisms within the standard model, and can also constrain various beyond-standard-model processes. Here the measurement of the flavor composition performed on IceCube's High-Energy Starting Events sample with a livetime of about 7.5 years is presented. IceCube is directly sensitive to each neutrino flavor via the single cascade, track and double cascade event topologies. In IceCube, $ν_τ$-CC interactions above $\sim$ 100 TeV can produce resolvable double cascades, breaking the degeneracy between $ν_e$ and $ν_τ$ present at lower energies. IceCube's first two identified double cascades are presented and the properties of the two $ν_τ$ candidates are discussed. : Presented at the 36th International Cosmic Ray Conference (ICRC 2019). See arXiv:1907.11699 for all IceCube contributions |
format |
Article in Journal/Newspaper |
author |
Stachurska, Juliana |
author_facet |
Stachurska, Juliana |
author_sort |
Stachurska, Juliana |
title |
First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition |
title_short |
First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition |
title_full |
First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition |
title_fullStr |
First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition |
title_full_unstemmed |
First Double Cascade Tau Neutrino Candidates in IceCube and a New Measurement of the Flavor Composition |
title_sort |
first double cascade tau neutrino candidates in icecube and a new measurement of the flavor composition |
publisher |
arXiv |
publishDate |
2019 |
url |
https://dx.doi.org/10.48550/arxiv.1908.05506 https://arxiv.org/abs/1908.05506 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1908.05506 |
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1766202151574437888 |