Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster VII

Q 56.35: Poster

Thursday, March 14, 2024, 17:00–19:00, KG I Foyer

Probing physics beyond the standard model using ultracold mercury — •Thorsten Groh, Sascha Heider, and Simon Stellmer — Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn

Dark matter searches for physics beyond the standard model (SM) range from cosmological observations to high-energy collision experiments and low-energy table-top experiments. The baryon asymmetry of the universe explained by recent baryogenesis therories requires a degree of CP-violation that might result in a measurable atomic electric dipole moment (EDM). High precision spectroscopy of atomic isotope shifts could probe for a new force carrier that directly couples neutrons and electrons [Delaunay, PRD 96, 093001 (2017); Berengut, PRL 120, 091801 (2018)].

Mercury being one of the heaviest laser-coolable elements makes it an ideal platform for beyond SM physics like baryon asymmetry searches [Graner PRL 116, 161601 (2016)]. Excellent for isotope shift spectroscopy it possesses five naturally occurring bosonic isotopes, all of which we laser cool in our lab.

We report on recent improvements and upgrades on the machine for transferring magneto-optically trapped mercury atoms to a high power optical dipole trap. We present latest results on high resolution deep UV laser isotope shift spectroscopy and multidimensional King plot analysis of the nonlinearities. Furthermore we give outlook to beyond the state-of-the-art measurements of the atomic EDM of mercury.

Keywords: electric dipole moment searches; isotope shift spectroscopy; beyond standard model physics; magneto-optical trap; optical dipole trap