Speaker
Description
The Askaryan Radio Array (ARA) is an ultra-high energy (UHE) neutrino observatory designed to detect the impulsive radio waves produced by relativistic particle cascades in the Antarctic glacial ice. ARA has five independent stations which have been taking data for over a decade. Here we present a revised calculation of ARA’s sensitivity to UHE neutrinos based on a time-dependent simulation of the array from 2013-2023. In addition to improvements to detector simulations, our revised sensitivity now includes a detailed calculation of the contribution of secondary particles to the overall array-wide sensitivity. We show that, even with only five stations, the ARA dataset is the world’s most sensitive to UHE neutrinos above about 10 EeV, demonstrating the power of large in-ice radio arrays for UHE neutrino detection. Finally, we present implications for next-generation UHE neutrino experiments, in particular IceCube-Gen2 Radio.