Hadronic Vacuum Polarization and the MUonE proposal

Understand

The MUonE proposal at the CERN SPS consists in extracting the value of the hadronic vacuum polarization self-energy function (HVP) from its contribution to the differential cross-section of elastic muon-electron scattering.

• The HVP contribution to the muon anomalous magnetic moment can then be obtained from a weighted integral of the measured HVP self-energy function.
• This, however, requires a knowledge of the HVP function in its full integration domain.
• This paper discusses a procedure to reconstruct the HVP function in the regions not directly accessible to measurement.