Searches for Ultra-High Energy Neutrinos with ANITA
Cosmin Deaconu (for the ANITA Collaboration)
TL;DR
This paper reports on the ANITA balloon experiment's searches for ultra-high-energy neutrinos, presenting the most stringent flux limits to date and discussing future improvements with the PUEO project.
Contribution
It provides new ultra-high-energy neutrino flux limits from ANITA flights and introduces the PUEO upgrade with enhanced sensitivity.
Findings
Most stringent limits on neutrino flux above 10^19.5 eV
Successful flights in 2015 and 2016
Proposed PUEO with improved detection capabilities
Abstract
The ANtarctic Impulsive Transient Antenna (ANITA) long-duration balloon experiment flies an interferometric radio array over Antarctica with a primary goal of detecting impulsive Askaryan radio emission from ultra-high-energy neutrinos interacting in the ice sheet. The third and fourth ANITA flights were completed in January 2015 and December 2016, respectively, obtaining the most stringent limits on the diffuse ultra-high-energy neutrino flux above 10 eV to date. We also discuss ongoing analyses and the proposed Payload for Ultrahigh Energy Observations (PUEO), the successor to the ANITA program. PUEO's larger number of antennas and improved trigger would significantly improve sensitivity compared to ANITA-IV.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Radio Astronomy Observations and Technology · Neutrino Physics Research