Special Fixed Target Cross talk: MUonE

by Matteo Fael (CERN), Riccardo Pilato (University of Liverpool (GB))

Monday 20 Nov 2023, 14:00 → 16:00 Europe/Zurich

4/2-011 - TH common room (CERN)

The MUonE experiment aims to measure the differential cross section of the 𝜇-e elastic scattering using the CERN SPS muon beam with mean energy of 160 GeV onto atomic electrons of a low-Z target. Thanks to the intense M2 beam with in-spill intensity of  5 ✕ 10⁷ muons/s, a precise measurement of the scattering angles allows to extract the hadronic contribution to the running of the QED coupling, and by a novel approach the leading hadronic contribution to the muon anomalous magnetic moment. This determination will be completely independent from the usual data-driven method, based on measurements of the R-ratio in e+e- annihilations, and could clarify the discrepancy between these results and the theory-based estimates from recent lattice QCD calculations. The main theoretical motivations, the experiment design and the strategies to extract the hadronic running will be presented.