Progress in the ACME III Search for the Electron EDM

ORAL

Abstract

The ACME experiment probes physics beyond the Standard Model by measuring the electron electric dipole moment (eEDM) through a spin precession experiment in a beam of thorium monoxide. In 2018, the second generation of the ACME experiment placed the current upper limit on the eEDM at |de|<1.1×10-29 e·cm (Nature 562(2018), 355-360). The third generation of the experiment is currently under construction. We provide an overview of the experiment and describe upgrades that either have been demonstrated or are under development, such as a longer spin precession time, an electrostatic molecular lens, enhanced fluorescence detection, and improved electric and magnetic field control. Together, the upgrades are projected to increase the statistical sensitivity of the experiment to the electron EDM by an order of magnitude while sufficiently suppressing known sources of systematic error.

*Funded by the National Science Foundation, Sloan Foundation, and Gordon and Betty Moore Foundation.

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Presenters

  • Daniel G Ang

    • Harvard University

Authors

  • Daniel G Ang

    • Harvard University

  • Cole Meisenhelder

    • Harvard University

  • David DeMille

    • University of Chicago
    • The University of Chicago
    • University of Chicago & Argonne National Laboratory

  • Collin Diver

    • Northwestern University

  • John M Doyle

    • Harvard University

  • Zhen Han

    • University of Chicago

  • Ayami Hiramoto

    • Okayama University

  • Peiran Hu

    • University of Chicago

  • Nick R Hutzler

    • Caltech
    • California Institute of Technology

  • Daniel D Lascar

    • Northwestern University

  • Zack Lasner

    • Harvard University

  • Siyuan Liu

    • Northwestern University

  • Takahiko Masuda

    • Okayama Univ

  • John Mitchell

    • Northwestern University

  • Cristian D Panda

    • UC Berkeley

  • Noboru Sasao

    • Okayama University

  • Satoshi Uetake

    • Okayama University

  • Maya Watts

    • Northwestern University

  • Xing Wu

    • University of Chicago

  • Koji Yoshimura

    • Okayama University

  • Gerald Gabrielse

    • Northwestern University