Recent Results from ANITA

Abstract

The ANtarctic Impulsive Transient Antenna (ANITA) long-duration balloon payload searches for Askaryan radio emission from ultra-high-energy ($>10^{18}$ eV) neutrinos interacting in Antarctic ice. ANITA is also sensitive to geomagnetic radio emission from extensive air showers (EAS). This talk summarizes recently released results from the third flight of ANITA, which flew during the 2014-2015 Austral summer. The most sensitive search from ANITA-III identified one neutrino candidate with an a priori background estimate of 0.7${}_{-0.3}^{+0.5}$. When combined with previous flights, ANITA sets the best limits on diffuse neutrino flux at energies above $\sim 10^{19.5}$ eV. Additionally, ANITA-III searches identified nearly 30 EAS candidates. One unusual event appears to correspond to an upward-going air shower, similar to an event from ANITA-I.

arXiv commentCIPANP2018 proceedings. 6 pages, 3 figures

References in corpus (4)

• Observation of Ultra-high-energy Cosmic Rays with the ANITA Balloon-borne Radio Interferometer
• Characteristics of Four Upward-pointing Cosmic-ray-like Events Observed with ANITA
• Observation of an Unusual Upward-going Cosmic-ray-like Event in the Third Flight of ANITA
• Constraints on the diffuse high-energy neutrino flux from the third flight of ANITA