CANTON-$\mu$ Proposal: A Next-Generation Muon $g-2$ Measurement at Sub-0.1 ppm Precision
Abstract
We propose a next-generation precision measurement of the muon anomalous magnetic moment (muon ), at the High Intensity Heavy-Ion Accelerator Facility (HIAF) in China. The project, named CANTON- (Coherent Anomalous magNetic momenT ObservatioN with muon), represents the first muon experiment aimed at surpassing Fermilab precision. It introduces novel approaches based on HIAF's intense pulsed GeV-scale muon beams, particularly for negative-muon polarity. This work studies the expected muon beam intensity at HIAF, establishing the statistical reach and level of systematic control required to achieve a precision of 0.13 ppm in Phase 1, matching the current Fermilab precision, and 0.05 ppm in Phase 2 with the HIAF upgrade. This precision enables stringent tests of the Standard Model with sensitivity to new physics beyond current collider scales, and offers a uniquely sensitive test of CPT symmetry within the Standard-Model Extension at the GeV level, improving existing limits by more than an order of magnitude.
Keywords
Cite
@article{arxiv.2512.11486,
title = {CANTON-$\mu$ Proposal: A Next-Generation Muon $g-2$ Measurement at Sub-0.1 ppm Precision},
author = {Ce Zhang and Yu Xu and On Kim and Bingzhi Li and Guodong Shen and Liangwen Chen and Fedor Ignatov and Liang Li and Qiang Li and Xueheng Zhang and Zhiyu Sun},
journal= {arXiv preprint arXiv:2512.11486},
year = {2026}
}
Comments
32 pages, 10 figures