CeNTREX : A Search for Time Reversal Symmetry Violation using ^{205}TlF molecules

POSTER

Abstract

The Cold molecule Nuclear Time-Reversal EXperiment (CeNTREX) aims to search for the fundamental time-reversal symmetry (T) and parity (P) violation in the hadronic sector. The Standard Model provides for T (and hence CP) symmetry violation in the quark mixing (CKM) matrix, but this is not sufficient to generate the magnitude of the baryon asymmetry observed in the universe. Many Standard Model extensions propose additional sources of T-violation, and Schiff moments and electric dipole moments (EDMs) are excellent probes free of Standard Model backgrounds. CeNTREX utilizes shifts in nuclear magnetic resonance frequencies of the ^{205}Tl nucleus in highly polarized thallium fluoride (TlF) molecules to search for these T violating interactions. With the expected experimental sensitivity, we would be able to set competitive bounds on $\theta_{\rm QCD}, quark chromo electric dipole moments (cEDMs), and the proton EDM. CeNTREX uses modern methods including a cryogenic molecular beam source, optical state preparation and detection, and coherent quantum state manipulation. This poster provides an overview of the experiment and the techniques involved, its current status and recent progress, as well as the upcoming developments and anticipated timeline for a nuclear Schiff moment measurement.

**This work is funded by the Heising-Simons Foundation, NSF and the U.S. DOE, Office of Science, Office of Nuclear Physics, under contract DE-AC02-06CH11357.

Presenters

  • Yuanhang Yang

    • University of Chicago

Authors

  • Yuanhang Yang

    • University of Chicago
  • David DeMille

    • University of Chicago
    • University of Chicago and Argonne National Laboratory
  • Oliver O Grasdijk

    • Argonne National Laboratory
  • David M Kawall

    • University of Massachusetts Amherst
  • Jianhui Li

    • Columbia University
  • Tristan Winick

    • University of Massachusetts Amherst
  • Tanya Zelevinsky

    • Columbia University
  • Perry Zhou

    • Columbia University
  • Jakob Kastelic

    • Yale University