Jul 12 – 23, 2021
Europe/Berlin timezone

An analysis of a tau-neutrino origin for the atypical ANITA-IV cosmic-ray-like events

Jul 14, 2021, 6:00 PM
1h 30m


Talk NU | Neutrinos & Muons Discussion


Remy Prechelt (University of Hawai'i)


The ANITA collaboration has recently reported on four anomalous cosmic-ray-like events observed during ANITA's fourth flight that are observationally consistent with air showers from upgoing particles emerging from the Antarctic ice. One possible interpretation of these events is that they are due to ultrahigh energy tau neutrinos interacting in the Earth, resulting in an extensive air shower initiated by the decay of the tau lepton after it leaves the ice. Unlike previous ANITA anomalous events that were observed from steeply inclined angles, the four events observed by ANITA-IV appear to originate very close to the radio horizon. We present a comprehensive study of a tau-neutrino origin for these events (from both point-source and diffuse neutrino fluxes) and discuss how these events compare against the point source limits set by other neutrino observatories.


ANITA; tau neutrino; anomalous events; ultrahigh energy; UHE; PUEO; tau

Collaboration ANITA
Subcategory Experimental Results

Primary author

Remy Prechelt (University of Hawai'i)


Dr Stephanie Wissel (Pennsylvania State University) Dr Andres Romero-Wolf (Jet Propulsion Laboratory)

Presentation materials