Sommaire:

Fundamental electric dipole moments (EDM) are powerful low-energy probes [1] in the search for New Physics and an important
complement to searches using high-energy particle colliders. In particular, the existence of lepton EDMs imply the
violation of charge-parity (CP) symmetry beyond that already known and implemented into the Standard Model of elementary
particles. The discovery of a fundamental EDM could therefore offer a viable mechanism for explaining the observed dissymmetry
between matter and antimatter in our universe.

In the talk I will focus on the particularly promising search for the electron EDM. After several decades of using heavy
atoms as low-energy probes, the most stringent upper bounds on the electron EDM are today obtained from collaborative work of
experimentalists and theorists using diatomic molecules. After a survey of the state of the art I will present an ongoing
effort [2] employing the molecule radium-silver (RaAg), so far never created in a laboratory, which has the potential of
increasing the current sensitivity of electron EDM probes by 3-4 orders of magnitude.

[1] R. Alarcon et al., arXiv: 2203.08103 [hep-ph] (2022)
[2] T. F., D. DeMille, New J. Phys. 23 (2021) 113039

Pour plus d'informations, merci de contacter Scribano Y.