Speaker
Description
The MUonE experiment seeks to directly measure the hadronic contribution to the anomalous magnetic moment of the muon, providing an opportunity to resolve the tension between differing theoretical predictions for g-2. This will be achieved through the measurement of the angular distribution of high-momentum muons elastically scattering off electrons in a fixed target. Whilst the proposed full-scale experiment will run after the Long Shutdown of CERN scheduled for this year, a number of pilot runs with scaled versions of the detector have been performed in recent years using the high-intensity M2 muon beam, located in the North Area of CERN, culminating in a long duration data-taking run in 2025. In this run, three tracking "stations" were installed, comprising each of 6 tracking planes, using the 2S module designed for the Phase-II upgrade of the CMS detector, alongside an electromagnetic calorimeter, muon detector, timing detector and two further tracking stations located upstream to provide momentum information. This apparatus allowed for the accurate measurement of both the incident muon as well as its products as a result of a scattering event within one of the two targets installed. The run lasted for 2 months over the summer of 2025, recording over 500 billion scattering candidate events.
In this contribution, the development of the novel triggerless DAQ system used in 2025 will be presented, alongside preliminary results for the performance of the tracking system both in resolution and efficiency, as well as projections for physics results to come from the data recorded.