A New Bound on the Electron's Electric Dipole Moment

ORAL

Abstract

The Standard Model cannot explain the predominance of matter over anti-matter in our universe. This asymmetry indicates the existence of new CP-violating interactions, which would induce an electric dipole moment of the electron (eEDM). I will present the most precise measurment of the eEDM to date using electrons confined inside hafnium flouride ions (HfF+). We trap HfF+ in corotating electric and magnetic fields, and measure the eEDM signal by preforming Ramsey spectroscopy with coherence times up to 3 seconds. Our result is consistent with zero and improves on the previous best upper limit by a factor of ∼ 2.4.

*This work was supported by the Marsico foundation, the Sloan Foundation, the Gordon and Betty Moore Foundation, NIST, and the NSF (Award PHY1125844).

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Publication: A new bound on the electron's electric dipole moment https://arxiv.org/pdf/2212.11841.pdf
Systematic and statistical uncertainty evaluation of the HfF+ electron electric dipole moment experiment https://arxiv.org/pdf/2212.11837.pdf

Presenters

  • Trevor Wright

    • JILA

Authors

  • Trevor Wright

    • JILA

  • Luke A Caldwell

    • JILA, University of Colorado Boulder and NIST

  • Tanya Roussy

    • University of Colorado, Boulder

  • Kia Boon Ng

    • University of Colorado, Boulder

  • Sun Yool Park

    • University of Colorado, Boulder

  • Noah Schlossberger

    • JILA

  • Anzhou Wang

    • University of Colorado, Boulder

  • Eric A Cornell

    • University of Colorado and NIST

  • Jun Ye

    • CU Boulder
    • JILA, University of Colorado Boulder
    • JILA