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Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

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arxiv 1810.00439 v1 pith:I55U2D5B submitted 2018-09-30 astro-ph.HE

Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

classification astro-ph.HE
keywords anitaeventeventsconsistentcosmic-ray-likeobservedoriginproceedings
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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These proceedings address a recent publication by the ANITA collaboration of four upward- pointing cosmic-ray-like events observed in the first flight of ANITA. Three of these events were consistent with stratospheric cosmic-ray air showers where the axis of propagation does not inter- sect the surface of the Earth. The fourth event was consistent with a primary particle that emerges from the surface of the ice suggesting a possible {\tau}-lepton decay as the origin of this event. These proceedings follow-up on the modeling and testing of the hypothesis that this event was of {\tau} neutrino origin.

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