The MUonE experiment
Via Irnerio, 46 40126 Bologna, Italy
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Published online: 17 June 2019
The precision measurement of the anomalous magnetic moment g − 2 of the muon at present exhibits a 3.5 σ deviation between theory and experiments. In the next few years it will be measured to higher precisions at Fermilab and J-PARC. The theoretical prediction can be improved by reducing the uncertainty on the leading hadronic correction to the g − 2. Here we present a new approach to determine with space-like data, by means of a precise measurement of the hadronic contribution to the eﬀective electromagnetic coupling α, exploiting the elastic scattering of 150 GeV muons (currently available at CERN North area) on atomic electrons of a low-Z target. The direct measurement of in the space-like region will provide a new independent determination and will consolidate the theoretical prediction of the muon g − 2 in the Standard Model. It will allow therefore a firmer interpretation of the measurements of the future muon g − 2 experiments at Fermilab and J-PARC.
© The Authors, published by EDP Sciences, 2019
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