A massive AI just spotted something weird inside the Large Hadron Collider that has human physicists totally stumped.
March 26, 2026
Original Paper
Searching for Anomalies with Foundation Models
arXiv · 2603.23593
The Takeaway
Using an AI architecture similar to the one behind ChatGPT, researchers scanned data from the CMS experiment and found a signal that shouldn't exist. This marks a major milestone where a general-purpose AI has independently identified a potential "new" piece of physics that had gone unnoticed by experts.
From the abstract
Foundation models have the potential to extend the discovery reach for anomaly detection searches. When studying the large OmniLearned foundation model on data from the CMS experiment, unexpected behavior was observed in a mass sideband. The purpose of this paper is to perform a full analysis, including a complete background estimate, on the phase space picked out by the large model. We find that the background estimation describes the data well in validation regions, but is unable to accurately