A precision measurement of the electron's electric dipole moment using trapped molecular ions

2017/04/25 by William B. Cairncross, Daniel N. Gresh, Matt Grau +6 · 1 citation
Physics and Astronomy · #physics.atom-ph #hep-ex

paper · pdf · doi:10.1103/physrevlett.119.153001

published as Phys. Rev. Lett. 119, 153001 (2017)

arxiv created 2017/04/25 · arxiv updated 2017/10/18

Abstract

We describe the first precision measurement of the electron's electric dipole moment (eEDM, d_e) using trapped molecular ions, demonstrating the application of spin interrogation times over 700 ms to achieve high sensitivity and stringent rejection of systematic errors. Through electron spin resonance spectroscopy on ¹⁸⁰\rm Hf¹⁹\rm F⁺ in its metastable ³Δ₁ electronic state, we obtain d_e = (0.9 ± 7.7_{\rm stat} ± 1.7_{\rm syst}) × 10^-29 e \rm cm, resulting in an upper bound of |d_e| < 1.3 × 10^-28 e \rm cm (90% confidence). Our result provides independent confirmation of the current upper bound of |d_e| < 9.3 × 10^-29 e \rm cm [J. Baron et al., Science 343, 269 (2014)], and offers the potential to improve on this limit in the near future.

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