Hemispheric Asymmetry in Energy and Signalness of IceCube GOLD Events: An Exploratory Analysis

We report two independent statistical anomalies in IceCube GOLD-class neutrino alert events (N=54, Rev=1, 2019-2026). First, southern-sky events (Dec<0) show significantly higher median energy than northern-sky events (349 vs. 183 TeV; Spearman rho=-0.328, p=0.0155). Second, Leo core zone events (RA=120-150 deg) show elevated signalness (mean 0.835 vs. 0.565; Mann-Whitney p=0.0186). A simplified Monte Carlo test under isotropic source assumptions suggests both anomalies occurring simultaneously is unlikely (p~0.0002), but this depends on the adopted detector model and should be regarded as preliminary. Whether the asymmetry reflects detector sensitivity effects, source distribution, or both cannot be determined from the present dataset. This paper presents these as exploratory findings requiring pre-registered independent verification. Critical review was solicited from independent AI systems (Claude/Anthropic, ChatGPT/OpenAI) before submission, and several overclaims were explicitly removed as a result.