Revision 2

Accepted · core change · record

Changes against revision 1:

Title · changed: Revision 1: Proton and antiproton magnetic moments compared at 1e-12; Revision 2: Proton and antiproton magnetic moments compared at $10^{-12}$
Plain: A single proton or antiproton held in an electromagnetic trap can have its magnetism measured by flipping its spin. Matter-antimatter symmetry requires the two magnetic moments to be equal and opposite.
Precise · changed · core: Revision 1: BASE compared proton and antiproton charge-to-mass ratios to 16 ppt (2022) and magnetic moments to about 1.5 ppb (2017). Determine whether $\left|\mu_{\mathrm{pbar}}\right|/\mu_{\mathrm{p}} - 1$ is nonzero at the 1e-12 level, using sympathetic or quantum-logic cooling for faster single-spin-flip detection.; Revision 2: BASE compared proton and antiproton charge-to-mass ratios to 16 ppt (2022) and magnetic moments to about 1.5 ppb (2017). Determine whether $\left|\mu_{\mathrm{pbar}}\right|/\mu_{\mathrm{p}} - 1$ is nonzero at the $10^{-12}$ level, using sympathetic or quantum-logic cooling for faster single-spin-flip detection.
Settled by: Penning-trap measurements of the proton and antiproton g-factors each at sub-ppt uncertainty.
Kind: well-posed
Answer type: yes-no
References: (empty)
Literature status: open
Status note: (empty)
Posed since: (empty)

Decisions