Comprehensive analysis of anomalous ANITA events disfavors a diffuse tau-neutrino flux origin

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Issue Date
2019-03-18Author
Romero-Wolf, A.
Besson, David Zeke
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
© 2019 American Physical Society.
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Show full item recordAbstract
Recently, the ANITA collaboration reported on two upward-going extensive air shower events consistent with a primary particle that emerges from the surface of the Antarctic ice sheet. These events may be of ντ origin, in which the neutrino interacts within the Earth to produce a τ lepton that emerges from the Earth, decays in the atmosphere, and initiates an extensive air shower. In this paper we estimate an upper bound on the ANITA acceptance to a diffuse ντ flux detected via τ-lepton-induced air showers within the bounds of standard model uncertainties. By comparing this estimate with the acceptance of Pierre Auger Observatory and IceCube and assuming standard model interactions, we conclude that a ντ origin of these events would imply a neutrino flux at least two orders of magnitude above current bounds.
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Citation
A. Romero-Wolf et al., "Comprehensive analysis of anomalous ANITA events disfavors a diffuse tau-neutrino flux origin", Phys. Rev. D 99, 063011, DOI: 10.1103/PhysRevD.99.063011
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