September 27, 2021 to October 1, 2021
Indiana University
America/Indiana/Indianapolis timezone

Status of the MUonE experiment

Oct 1, 2021, 2:50 PM
20m
Virtual (Indiana University)

Virtual

Indiana University

Oral contribution Tau2021 Abstracts Session 7: Future directions

Speaker

Riccardo Nunzio Pilato (Universita & INFN Pisa (IT))

Description

The latest measurement of the muon g-2, recently announced at Fermilab, exhibits a 4.2$\sigma$ discrepancy from the currently accepted Standard Model prediction. The leading hadronic contribution $a_{\mu}^{HLO}$ represents the main source of uncertainty on the theoretical value, and is traditionally determined by a data-driven dispersive approach. In contrast, a recent evaluation of $a_{\mu}^{HLO}$ based on lattice QCD weakens the discrepancy between theory and experiment to 1.5$\sigma$. Therefore, an independent crosscheck of $a_{\mu}^{HLO}$ is required to solve this tension and consolidate the theoretical prediction.
The MUonE experiment proposes a novel approach to determine $a_{\mu}^{HLO}$ by measuring the running of the electromagnetic coupling constant in the space-like region, via $\mu-e$ elastic scattering. The measurement will be performed by scattering a 160 GeV muon beam, currently available at CERN's North Area, on the atomic electrons of a low-Z target. A Test Run on a reduced detector is planned in 2021-2022, to validate this proposal. The status of the experiment in view of the Test Run will be presented.

What is your topic? Anomalous Magnetic Moment of the muon

Primary author

Riccardo Nunzio Pilato (Universita & INFN Pisa (IT))

Presentation materials