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The Muon g-2 experiment at Fermilab has recently confirmed Brookhaven's earlier measurement of the muon anomalous magnetic moment a_μ increasing the discrepancy with the Standard Model prediction and strengthening its "new physics" interpretation. On the other hand, a recent high-precision lattice QCD determination of the leading hadronic contribution to a_μ weakens this discrepancy. In this talk we will present the recently proposed MUonE experiment at CERN which, by scattering high-energy muons on atomic electrons of a low-Z target, aims at providing a new determination of the leading hadronic contribution to a_μ alternative to the lattice QCD and dispersive ones.
Michel De Cian and Federico Leo Redi (From an idea of Riccardo Rattazzi)