Electron EDM search with laser-cooled heavy elements"

ORAL

Abstract

The large imbalance in the amounts of matter and antimatter currently observed in the universe demands physics beyond the standard model, which violates fundamental symmetries. Recently, the search for a non-zero permanent electric dipole moment (EDM) of an elementary particle has taken place actively world-wide, because the existence of EDM violates charge conjugation parity symmetry. It is predicted that the EDM of an electron (eEDM) is enhanced in paramagnetic atoms. Francium (Fr), being the heaviest alkali element, is known to possess the largest eEDM enhancement factor amongst any ground-state atom. Therefore, we aim to search for the eEDM with unprecedented precision using Fr atoms trapped in an optical lattice. In this talk, the current status of the Fr experiment conducted at RIKEN Nishina center will be presented.

*This work was supported by JSPS KAKENHI Grant Numbers JP19H05601, JP22K18273, JP18K18762.

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Publication: N. Ozawa et al., Rev Sci Instrum 94, 023306 (2023).

Presenters

  • Hiroki Nagahama

    • The University of Tokyo

Authors

  • Hiroki Nagahama

    • The University of Tokyo

  • Keisuke Nakamura

    • The University of Tokyo

  • Motoki Sato

    • The University of Tokyo
    • The University of Tokyo, RIKEN Nishina center

  • Shintaro Nagase

    • The University of Tokyo

  • Teruhito Nakashita

    • The University of Tokyo
    • The University of Tokyo, RIKEN Nishina center

  • Mirai Fukase

    • The University of Tokyo

  • Shiko Kumahara

    • Tokyo University of Agriculture and Technology

  • Kota Abe

    • Rikkyo University

  • Takatoshi Aoki

    • The University of Tokyo

  • Hiromitsu Haba

    • RIKEN
    • RIKEN Nishina center
    • Nishina Center for Accelerator-Based Science, RIKEN

  • Aiko Takamine

    • RIKEN Nishina Center
    • RIKEN Nishina center
    • RNC, RIKEN
    • RIKEN Nishina Center for Accelerator-Based Science, Japan

  • Yasuhiro Sakemi

    • The University of Tokyo