CeNTREX : A Search for time-reversal symmetry violation using 205TlF molecules

POSTER

Abstract

The Cold Molecule Nuclear Time-Reversal Experiment (CeNTREX) seeks to detect the time-reversal (T) and charge-conjugation–parity (CP) symmetry violating Schiff moment of the ^{205}\mathrm{Tl} nucleus by measuring shifts in nuclear magnetic resonance frequencies in highly polarized thallium fluoride (TlF) molecules. To maximize sensitivity, we employ rotational cooling and an electrostatic quadrupole lens (EQL) for molecular focusing, as well as coherent state transfer and manipulation techniques to enhance the Schiff moment signal. In addition, we have developed a laser transfer locking scheme to maintain stable laser frequencies and constructed a new detection chamber that enables large collection angles with minimal scattering. With the anticipated experimental sensitivity, CeNTREX can set competitive bounds on \theta_{\mathrm{QCD}}​, quark chromo-electric dipole moments (cEDMs), and the proton EDM.

*This work is funded by the Heising-Simons Foundation, a NIST Precision Measurement Grant, NSF-MRI grants PHY1827906, PHY-1827964, and PHY-1828097, NSF grant PHY-2110420, and the Department of Energy (DOE), Office of Science, Office of Nuclear Physics, under contract number DEAC02-06CH11357 and grant number DE-SC0024667.

Presenters

  • Pengyu Zhou

    • Columbia University

Authors

  • Pengyu Zhou

    • Columbia University

  • David P DeMille

    • Johns Hopkins University
    • Argonne National Lab, Johns Hopkins University, University of Chicago
    • University of Chicago
    • Argonne National Laboratory, Johns Hopkins University, University of Chicago

  • Olivier Grasdijk

    • Argonne National Lab
    • Argonne National Laboratory

  • David Kawall

    • University of Massachusetts Amherst

  • Jianhui Li

    • Columbia University

  • Emma McClure

    • University of Chicago
    • university of chicago

  • Tristan Winick

    • University of Massachusetts Amherst

  • Junlin Wu

    • University of Massachusetts Amherst
    • University of Massachusetts, Amherst

  • Yuanhang Yang

    • University of Chicago

  • Tanya Zelevinsky

    • Columbia University