Status of the MUonE experiment

The MUonE experiment aims to measure the hadronic vacuum polarization contribution to the muon anomaly $a_\mu^{HLO}$ better than 1%. An innovative approach is proposed, using elastic scattering of 160 GeV muons on atomic electrons in a low-Z target. A precision of 10 ppm on the angular distribution of the scattering particles in the muon-electron scattering process is required. The M2 beamline at CERN provides the necessary intensity to reach the statistical goal in few years of data taking. In summer 2024 a Proposal has been sent to the CERN SPSC asking for the Phase 1 of MUonE to be performed with a small scale experiment in 2025. This is expected to obtain a first measurement of the hadronic contribution to the running QED coupling, $Δ𝛼_{ℎ𝑎𝑑}$ , with a 20% statistical uncertainty. We will present the progress achieved in the last years, the current status, and the future plans of the experiment.

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Publication Details

Published
2025-12-05
DOI
https://doi.org/10.22323/1.489.0045
Primary Topic
Particle physics theoretical and experimental studies
Type
article
Field-Weighted Citation Impact
0.00

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article

Status of the MUonE experiment

Eugenia Spedicato
Particle physics theoretical and experimental studies
article

Status of the MUonE experiment

Eugenia Spedicato
article en

Abstract

The MUonE experiment aims to measure the hadronic vacuum polarization contribution to the muon anomaly $a_\mu^{HLO}$ better than 1%. An innovative approach is proposed, using elastic scattering of 160 GeV muons on atomic electrons in a low-Z target. A precision of 10 ppm on the angular distribution of the scattering particles in the muon-electron scattering process is required. The M2 beamline at CERN provides the necessary intensity to reach the statistical goal in few years of data taking. In summer 2024 a Proposal has been sent to the CERN SPSC asking for the Phase 1 of MUonE to be performed with a small scale experiment in 2025. This is expected to obtain a first measurement of the hadronic contribution to the running QED coupling, $Δ𝛼_{ℎ𝑎𝑑}$ , with a 20% statistical uncertainty. We will present the progress achieved in the last years, the current status, and the future plans of the experiment.

European Commission
Openalex Percentile: Top 83%
Particle physics theoretical and experimental studies
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