Invisible Neutrino Decay Could Resolve IceCube’s Track and Cascade Tension

Peter Bennert Denton; Irene Tamborra

doi:10.1103/PhysRevLett.121.121802

Invisible Neutrino Decay Could Resolve IceCube’s Track and Cascade Tension

Peter Bennert Denton, Irene Tamborra

28 Citationer (Scopus)

39 Downloads (Pure)

Abstract

The IceCube Neutrino Observatory detects high energy astrophysical neutrinos in two event topologies: tracks and cascades. Since the flavor composition of each event topology differs, tracks and cascades can be used to test the neutrino properties and the mechanisms behind the neutrino production in astrophysical sources. Assuming a conventional model for the neutrino production, the IceCube data sets related to the two channels are in >3σ tension with each other. Invisible neutrino decay with lifetime τ/m=102 s/eV solves this tension. Noticeably, it leads to an improvement over the standard nondecay scenario of more than 3σ while remaining consistent with all other multimessenger observations. In addition, our invisible neutrino decay model predicts a reduction of 59% in the number of observed ντ events which is consistent with the current observational deficit.

Originalsprog	Engelsk
Artikelnummer	121802
Tidsskrift	Physical Review Letters
Vol/bind	121
Antal sider	6
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.121.121802
Status	Udgivet - 20 sep. 2018

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10.1103/PhysRevLett.121.121802Licens: CC BY

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abstract = "The IceCube Neutrino Observatory detects high energy astrophysical neutrinos in two event topologies: tracks and cascades. Since the flavor composition of each event topology differs, tracks and cascades can be used to test the neutrino properties and the mechanisms behind the neutrino production in astrophysical sources. Assuming a conventional model for the neutrino production, the IceCube data sets related to the two channels are in >3σ tension with each other. Invisible neutrino decay with lifetime τ/m=102 s/eV solves this tension. Noticeably, it leads to an improvement over the standard nondecay scenario of more than 3σ while remaining consistent with all other multimessenger observations. In addition, our invisible neutrino decay model predicts a reduction of 59% in the number of observed ντ events which is consistent with the current observational deficit.",

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N2 - The IceCube Neutrino Observatory detects high energy astrophysical neutrinos in two event topologies: tracks and cascades. Since the flavor composition of each event topology differs, tracks and cascades can be used to test the neutrino properties and the mechanisms behind the neutrino production in astrophysical sources. Assuming a conventional model for the neutrino production, the IceCube data sets related to the two channels are in >3σ tension with each other. Invisible neutrino decay with lifetime τ/m=102 s/eV solves this tension. Noticeably, it leads to an improvement over the standard nondecay scenario of more than 3σ while remaining consistent with all other multimessenger observations. In addition, our invisible neutrino decay model predicts a reduction of 59% in the number of observed ντ events which is consistent with the current observational deficit.

AB - The IceCube Neutrino Observatory detects high energy astrophysical neutrinos in two event topologies: tracks and cascades. Since the flavor composition of each event topology differs, tracks and cascades can be used to test the neutrino properties and the mechanisms behind the neutrino production in astrophysical sources. Assuming a conventional model for the neutrino production, the IceCube data sets related to the two channels are in >3σ tension with each other. Invisible neutrino decay with lifetime τ/m=102 s/eV solves this tension. Noticeably, it leads to an improvement over the standard nondecay scenario of more than 3σ while remaining consistent with all other multimessenger observations. In addition, our invisible neutrino decay model predicts a reduction of 59% in the number of observed ντ events which is consistent with the current observational deficit.

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JO - Physical Review Letters

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Invisible Neutrino Decay Could Resolve IceCube’s Track and Cascade Tension

Abstract

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