The MUonE Experiment: Understanding Muon g−2 Puzzle via Muon-electron Scattering

by Dr Ce Zhang (University of Liverpool)

Friday 15 Sept 2023, 16:30 → 17:30 Asia/Shanghai

5#/6th-603 - Meeting Room 603 (Science Building)

Abstract: 

The latest measurement of the muon g-2 announced at Fermilab exhibits a large discrepancy from the currently accepted Standard Model prediction. The main source of uncertainty on the theoretical value is represented by the leading order hadronic contribution (a_m_HLO), which is traditionally determined through a data-driven dispersive approach. Currently, a calculation of a_m_HLO based on lattice QCD is in tension with the dispersive evaluation. In February 2023 the latest data measured by the CMD-3 collaboration disagreed significantly with all previous measurements and weakened the discrepancy between theory and experiment. An independent crosscheck of a_m_HLO is important to understand this tension and consolidate the theoretical prediction.

The MUonE experiment proposes a novel approach to determine a_m_HLO by measuring the running of the electromagnetic coupling constant via muon-electron elastic scattering in the space-like region. The measurement will be performed by using a 160 GeV muon beam at CERN. The experimental principle, hardware and software developments are introduced in this talk. The status of the experiment in view of the ongoing test run will be presented.

Biography:

Ce Zhang is currently a Postdoctoral Research Associate at the University of Liverpool. He obtained his Ph.D. in 2022 from Peking University. He was involved in the Muon g-2 experiment at J-PARC and is now working on the Muon g-2 experiment at Fermilab as well as the MUonE project.

Host: Prof. Liang Li

Online meeting :  https://meeting.tencent.com/dm/Aan2ib9jDKlC (id: 623175365, password: 123456)