PSILOGO

Laboratory for Particle Physics (LTP)


LTP Colloquium

The MUonE Experiment: A Novel Way To Measure The Leading Order Hadronic Contribution To The Muon g-2

Thursday, March 28, 2019, 16:00
WHGA Auditorium

Graziano Venanzoni, INFN Pisa

Abstract:
The precision measurement of the anomalous magnetic moment of the muon presently exhibits a 3.5 sigma discrepancy with the Standard Model (SM) prediction. In the next few years this measurement will reach an even higher precision at Fermilab and J-PARC. While the QED and electroweak contributions to the muon g-2 can be determined very precisely, the leading hadronic (HLO) correction is affected by a large uncertainty which dominates the error of the SM prediction. A novel approach has been proposed to determine the HLO contribution to the muon g-2 based on the measurement of the effective electromagnetic coupling in the space-like region at low-momentum transfer. We will discuss the possibility of performing this measurement at CERN by the MUonE experiment, which is part of the CERN PBC Study Group and aims at a very precise determination of the muon-electron elastic differential cross-section, exploiting the scattering of 150 GeV muons (currently available at CERN's North area) on atomic electrons of a low-Z target. Such a new and independent determination of the leading hadronic corrections to the muon g-2 will allow a more stringent test of the Standard Model when compared with the g-2 measurements expected at Fermilab and J-PARC. I will review the status of this proposal.