Description
Searches limiting the value of the permanent electric dipole moment on the electron (eEDM) are a sensitive probe of the Standard Model of particle physics and its extensions. Such searches have been performed in a number of different atoms and molecules, which resulted in the best current limit on the eEDM of $|d_e| < 1.1 \times 10^{-29}~\rm{e~cm}$ [1]. Our experiment has been setup with a BaF supersonic beam with velocities of $\approx600~\rm{m/s}$. The sensitivity towards an eEDM requires a phase sensitive spin precession measurement in well-known E- and B-fields (10 kV/cm, 10 nT resp.) [2]. The superposition state of the $|F=0 , m_F = |1|>$ magnetic substates in the $𝑋^2Σ^+ (𝜈 = 0, 𝑁 = 0)$ ground state of BaF is created and read out solely by pulsed laser field interactions. The resulting spin precession signal depends on laser field parameters such as intensity, polarization and frequency detuning. We experimentally investigated the dependence on these parameters which are indispensable for quantification of possible systematic biases that could arise on the eEDM limit extracted limit. We aim to complete an initial measurement stage at a sensitivity level $10^{−28}~\rm{e~cm}$ within this year.
[1] ACME Collaboration, Nature 562, 355–360 (2018).
[2] The NL-eEDM collaboration, Eur. Phys. J. D 72, 197 (2018)
| Presenter name | Virginia Marshall |
|---|---|
| How will you attend ICAP-27? | I am planning on in-person attendance |
