Antarctic Ice Detects 13 Cosmic-Ray Radio Pulses, Validating Askaryan Radiation
Researchers buried antennas in Antarctic ice and identified 13 radio pulses from cosmic-ray cascades. New simulations applied to the 2019 data show the signals match the predicted Askaryan radiation in arrival direction, frequency, waveform and polarization at 5.1 sigma, confirming the model and distinguishing them from neutrinos. A full multi-year data release from all five ARA stations is expected soon, with up to seven candidate neutrino events.