Speaker
Description
The ICARUS T600 LAr-TPC detector (760 t of ultrapure liquid argon) was successfully operated for three-years at the underground LNGS laboratory, carrying out a sensitive search for LSND-like anomalous appearance in the CERN Neutrinos to Gran Sasso beam. The LSND anomaly has been the subject of numerous experimental investigations over the past 25 years, suggesting the possible existence of a fourth, so-called “sterile” neutrino state, though no definitive conclusion has yet been reached.
Following a major overhaul at CERN, ICARUS was installed at Fermilab and began operations in 2020, recording neutrinos from the Booster Neutrino Beam (BNB) and from the off-axis Neutrinos at the Main Injector (NuMI) beam. In late 2025, ICARUS celebrated five continuous years of data taking, collecting about half a million of neutrino interactions, marking an important milestone for large-scale LAr-TPC technology supporting future projects such as DUNE.
This talk will highlight the ICARUS detector, its experimental program on sterile neutrino search, and recent results, with particular emphasis on the first ICARUS search for muon-neutrino disappearance in the BNB. Data are compared with simulation-based expectations and interpreted, for the first time, within a two-neutrino approximation of the 3+1 sterile-neutrino model, including all systematic uncertainties. In addition to oscillation searches, neutrino events recorded by ICARUS with the NuMI beam enable key measurements of neutrino cross sections and searches for physics beyond the Standard Model, whose first results will also be summarized in this contribution.