The MUonE detector at CERN

The MUonE experiment at CERN has been proposed as a novel approach to address the muon g-2 anomaly puzzle through precise measurement of the differential cross section of elastic scattering 𝜇𝑒 → 𝜇𝑒. This measurement can be achieved using an intense 160 GeV SPS muon beam directed onto atomic electrons in a light target. In recent years, the project has advanced through tests of increasing complexity. The first performance results will be presented from the analysis of the 2023 test run, which used a minimal prototype setup and recorded events in triggerless mode during one week of data taking. The Phase-1 pilot run is scheduled for 2025 and will involve a four-week run with a reduced setup, including three tracking stations, an electromagnetic calorimeter, and new subdetectors: a spectrometer to measure the incoming muon momentum event by event, scintillator planes to probe the dependence on muon arrival time, and a muon filter to identify the scattered muons. All subdetectors will be operated by a newly developed DAQ system, featuring real-time processing and online selection based on FPGA technology at a frequency of 40 MHz. The status of the Phase-1 pilot run and future plans will be presented