Status of the Muon g-2/EDM Experiment at J-PARC

TL;DR

The J-PARC Muon g-2/EDM experiment aims to precisely measure the muon magnetic anomaly using innovative technologies, providing a crucial cross-check of existing measurements and advancing understanding of fundamental particle properties.

Contribution

This paper introduces a novel experimental approach with new technologies for measuring muon g-2 and EDM, and reports on the current status and planned improvements.

Findings

Development of a compact muon storage magnet with high field uniformity

Implementation of a 3D spiral injection and MRI-type magnet technology

Achieving systematic uncertainties comparable to Fermilab's experiment

Abstract

The Muon g-2/EDM Experiment at J-PARC will employ a novel way to measure the muon magnetic anomaly, a_mu = (g-2)_mu/2, by using a low-emittance beam of positive muons stored in a compact muon storage magnet. The experimental method includes new technologies such as a three-dimensional spiral injection, an MRI-type storage magnet with superb field uniformity, and a positron tracking detector. The expected systematic uncertainty will be at the same level as that of the Fermilab Muon g-2 experiment, providing an important cross-check of the "storage-ring method" employed at BNL and Fermilab. I will present the current status of the experiment, ongoing tests and design optimizations, and the plans for improvements of the experimental precision.