AI 中文总结
本文利用 Askaryan 射电阵列 2013-2023 年数据开展首次全阵列超高能中微子弥散通量搜索，采用改进模型与统一框架，有望发现候选事例或设定严格通量极限，为未来射电阵列提供分析策略参考。
AI 中文摘要
Askaryan 射电阵列（ARA）是位于南极的超高能（UHE）中微子探测器，用于探测冰川冰中微子诱导的粒子簇射产生的脉冲宽带射电信号。ARA 由 5 个自主运行的站组成，接收天线部署深度达 200 米，已积累了所有冰内射电阵列中最长的有效观测时间。我们利用 2013 年 1 月至 2023 年 12 月采集的数据，开展了首次全阵列超高能中微子弥散通量搜索，该搜索整合了改进的探测器表征与模拟，包括数据驱动的噪声和电子模型、修正的天线响应，以及更新的中微子相互作用和轻子传播模型，这些内容被纳入一个统一框架，用于独立运行站的事例处理、本底排除和截断优化。此次搜索有望要么识别出冰内射电探测器观测到的首批超高能中微子候选事例，要么设定几个艾电子伏特以上最严格的超高能中微子弥散通量极限，同时为在建及未来的射电阵列（如 RNO-G 和 IceCube-Gen2 Radio）的分析策略提供参考。
英文摘要
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.
