The First Array-Wide Diffuse Flux Search for UHE Neutrinos with the Askaryan Radio Array
Abstract
The Askaryan Radio Array (ARA) is an ultrahigh energy (UHE) neutrino detector at the South Pole that searches for impulsive broadband radio signals from neutrino-induced particle showers in glacial ice. ARA consists of five autonomous stations with receiving antennas deployed up to 200 m deep and has accumulated the largest livetime of any in-ice radio array. We present the first array-wide diffuse UHE neutrino search using data collected from January 2013 to December 2023, incorporating improved detector characterization and simulation, including data-driven noise and electronics models, revised antenna responses, and updated neutrino interaction and lepton propagation modeling, within a unified framework for event processing, background rejection, and cut optimization across independently operating stations. This search is expected either to identify the first UHE neutrino candidates observed by an in-ice radio detector or to set the most stringent UHE neutrino diffuse flux limits above a few EeV, while informing analysis strategies for under-construction and future radio arrays, such as RNO-G and IceCube-Gen2 Radio.
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BibTeX
@misc{salcedogomez2026first,
title = {{The First Array-Wide Diffuse Flux Search for UHE Neutrinos with the Askaryan Radio Array}},
author = {Alan Salcedo-Gomez and Marco Stein Muzio and for the ARA Collaboration},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.30989},
eprint = {2608.30989},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.30989},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - The First Array-Wide Diffuse Flux Search for UHE Neutrinos with the Askaryan Radio Array
AU - Alan Salcedo-Gomez
AU - Marco Stein Muzio
AU - for the ARA Collaboration
PY - 2026
DA - 2026/08/31
PB - arXiv
DO - 10.48550/arxiv.2608.30989
UR - https://arxiv.org/abs/2608.30989
AB - The Askaryan Radio Array (ARA) is an ultrahigh energy (UHE) neutrino detector at the South Pole that searches for impulsive broadband radio signals from neutrino-induced particle showers in glacial ice. ARA consists of five autonomous stations with receiving antennas deployed up to 200 m deep and has accumulated the largest livetime of any in-ice radio array. We present the first array-wide diffuse UHE neutrino search using data collected from January 2013 to December 2023, incorporating improved detector characterization and simulation, including data-driven noise and electronics models, revised antenna responses, and updated neutrino interaction and lepton propagation modeling, within a unified framework for event processing, background rejection, and cut optimization across independently operating stations. This search is expected either to identify the first UHE neutrino candidates observed by an in-ice radio detector or to set the most stringent UHE neutrino diffuse flux limits above a few EeV, while informing analysis strategies for under-construction and future radio arrays, such as RNO-G and IceCube-Gen2 Radio.
ER -