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The aim of the Topical Workshop is to assess the state of the art of the theoretical determination of the muon anomalous magnetic moment, aμ, in view of the new measurements of the E989 Muon g-2 experiment at Fermilab and the new approach under development by the E34 collaboration at J-PARC. The workshop will focus on aμHLO, the leading hadronic contribution to the muon g-2, both analyzing the most recent experimental and theoretical results for its determination and the development of the Radiative Corrections and Monte Carlo tools for low energy e+e- to hadrons data.
Particular attention will be devoted to MUonE, a recently proposed experiment at CERN which aims at measuring the running of the electromagnetic coupling constant in the spacelike region by scattering high-energy muons on atomic electrons of a low-Z target through the process μe → μe. The differential cross section of this process provides the direct measurement of aμHLO and, therefore, an independent determination of the theoretical prediction for aμ competitive with the timelike dispersive approach.
The workshop follows the successful Topical Workshops held at MITP in 2018 and 2022.