New Limit on the Permanent Electric Dipole Moment of Xe 129 Using He 3 Comagnetometry and SQUID Detection

N. Sachdeva, I. Fan, E. Babcock, M. Burghoff, T. E. Chupp, S. Degenkolb, P. Fierlinger, S. Haude, E. Kraegeloh, W. Kilian, S. Knappe-Grüneberg, F. Kuchler, T. Liu, M. Marino, J. Meinel, K. Rolfs, Z. Salhi, A. Schnabel, J. T. Singh, S. StuiberW. A. Terrano, L. Trahms, J. Voigt

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We report results of a new technique to measure the electric dipole moment of Xe129 with He3 comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred to a measurement cell, and transported into a magnetically shielded room, where SQUID magnetometers detect free precession in applied electric and magnetic fields. The result from a one week measurement campaign in 2017 and a 2.5 week campaign in 2018, combined with detailed study of systematic effects, is dA(Xe129)=(1.4±6.6stat±2.0syst)×10-28 e cm. This corresponds to an upper limit of |dA(Xe129)|<1.4×10-27 e cm (95% C.L.), a factor of 5 more sensitive than the limit set in 2001.

Original languageEnglish (US)
Article number143003
JournalPhysical Review Letters
Volume123
Issue number14
DOIs
StatePublished - Oct 4 2019
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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