1. New Limit on the Permanent Electric Dipole Moment of $^{129}$Xe using $^{3}$He Comagnetometry and SQUID Detection
- Author
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Sachdeva, N., Fan, I., Babcock, E., Burghoff, M., Chupp, T.E., Degenkolb, S., Fierlinger, P., Haude, S., Kraegeloh, E., Kilian, W., Knappe-Grüneberg, S., Kuchler, F., Liu, T., Marino, M., Meinel, J., Rolfs, K., Salhi, Z., Schnabel, A., Singh, J.T., Stuiber, S., Terrano, W.A., Trahms, L., Voigt, J., Institut Laue-Langevin (ILL), and ILL
- Subjects
spin: precession ,Atomic Physics (physics.atom-ph) ,measurement methods ,FOS: Physical sciences ,Molecular ,electric moment: upper limit ,and Optical Physics ,Atomic ,[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] ,Physics - Atomic Physics ,xenon: nuclide ,ddc:530 ,nucleus: electric moment ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,spin: polarization ,helium: nuclide ,interference: quantum ,detector: design ,experimental results - Abstract
We report results of a new technique to measure the electric dipole moment of $^{129}$Xe with $^3$He 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 $d_A(^{129}\mathrm{Xe}) = (1.4 \pm 6.6_\mathrm{stat} \pm 2.0_\mathrm{syst})\times10^{-28}~e\,\mathrm{cm}$. This corresponds to an upper limit of $|d_A(^{129}\mathrm{Xe})| < 1.4 \times 10^{-27} ~e\,\mathrm{cm}~(95\%~\mathrm{CL})$, a factor of five more sensitive than the limit set in 2001., To be published in Physical Review Letters. arXiv admin note: substantial text overlap with arXiv:1902.02864
- Published
- 2019
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