Status of the MUonE experiment

TL;DR

The MUonE experiment aims to precisely measure muon-electron scattering to determine the hadronic contribution to the muon magnetic moment, with optimized detector setup and initial yield assessments for future systematic studies.

Contribution

This paper presents the current status, detector optimization, and initial yield estimates for the MUonE experiment, advancing the approach to measure the muon magnetic moment contribution.

Findings

Detector geometry has been optimized for the test run.

Expected yields for initial physics runs have been estimated.

Prospects for systematic uncertainty assessment are discussed.

Abstract

The MUonE experiment has been proposed to measure the differential cross section of $\mu e$ elastic scattering, by colliding the 160 GeV muons of the CERN M2 beam with atomic electrons of thin target plates. From a very precise measurement of the shape one can achieve a competitive determination of the leading hadronic contribution to the muon magnetic moment, independent from the other existing ones. In preparation for the Test Run with a reduced setup the detector geometry has been optimised. Expected yields for a first physics run with limited statistics are discussed, together with prospects for the assessment of the main systematic uncertainties.