Identifying and Characterizing Air Shower Events with the Payload for Ultrahigh Energy Observations (PUEO)

Le résumé fourni par la source

The Payload for Ultrahigh Energy Observations (PUEO) is a balloon-borne neutrino observatory currently under construction and slated to fly in December 2025. PUEO will be sensitive to both Askaryan radio emission from neutrino interactions in the ice, and geomagnetic and Askaryan emission created from either cosmic ray interactions or tau leptons decaying. Separating the air shower emission from the Askaryan emission is critical to achieving PUEO’s main science goal of measuring the flux of neutrinos above 1 EeV. In this contribution, I will describe how the sensitivity of PUEO’s air shower channel has been improved relative to its predecessor, ANITA. In particular, in addition to the classic main instrument which targets emission in the 300-1200 MHz range, PUEO is deploying a drop-down low frequency (LF) instrument capable of independently triggering on air shower events with frequencies between 50-300 MHz. Together, the main instrument and the LF instrument will increase the number of air shower events detected by PUEO, measure the frequency content, polarity, and pointing resolution of candidate events, and will further investigate the origin of the anomalous ANITA events.

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