Is the electron EDM nonzero above 10^-31 e cm? · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title · changed
Revision 1: Is the electron EDM nonzero above 1e-31 e cm?
Revision 2: Is the electron EDM nonzero above $10^{-31}$ e cm?
Plain
No electron dipole has been seen down to 4 parts in $10^{30}$ of an electron charge times a centimeter. Next-generation molecule experiments aim to look ten times deeper, where many theories with new heavy particles predict a signal.
Precise · changed · core
Revision 1: Current bound $\mid d_{e}\mid < 4.1e-30\,e\,\mathrm{cm}$ (90% CL, JILA HfF+, 2023), with the Standard Model contribution many orders smaller. Determine whether $d_{e}$ (or the equivalent electron-nucleon coupling $C_{\mathrm{S}}$) is nonzero at the $1e-31\,e\,\mathrm{cm}$ level using polar molecules (ThO, ThF+, YbOH, BaF or others).
Revision 2: Current bound $\mid d_{e}\mid < 4.1 \times 10^{-30}\,e\,\mathrm{cm}$ (90% CL, JILA HfF+, 2023), with the Standard Model contribution many orders smaller. Determine whether $d_{e}$ (or the equivalent electron-nucleon coupling $C_{\mathrm{S}}$) is nonzero at the $10^{-31}\,e\,\mathrm{cm}$ level using polar molecules (ThO, ThF+, YbOH, BaF or others).
Settled by · changed · core
Revision 1: A molecular EDM measurement with statistical and systematic uncertainty near 1e-31 e cm, confirmed in a second species.
Revision 2: A molecular EDM measurement with statistical and systematic uncertainty near $10^{-31}$ e cm, confirmed in a second species.
Kind
well-posed
Answer type
yes-no
References
(empty)
Literature status
open
Status note · changed
Revision 1: JILA's third-generation ThF+ experiment and ACME III (ThO) report progress toward roughly 1e-31 e cm sensitivity as of 2026.
Revision 2: JILA's third-generation ThF+ experiment and ACME III (ThO) report progress toward roughly $10^{-31}$ e cm sensitivity as of 2026.
Posed since
(empty)

Decisions