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T: Fachverband Teilchenphysik

T 26: Invited Topical Talks 1

T 26.1: Eingeladener Vortrag

Dienstag, 5. März 2024, 14:00–14:30, Geb. 30.21: Gerthsen-HS

New physics searches through the Higgs and atomic windows — •Elina Fuchs — Leibniz University Hannover, Germany — Physikalisch-Technische Bundesanstalt, Braunschweig, Germany

The observed matter-antimatter asymmetry of the Universe and the existence of Dark Matter are among the most compelling evidences for the necessity of physics beyond the Standard Model. As these puzzles do not predict at which energy scale to expect a discovery, a variety of observables at different energies is needed to explore viable scenarios. I will present two such avenues.

On the one hand, I will discuss how the precise measurements of the Higgs couplings allow one to determine to which extent CP violation in the interactions of the Higgs boson may contribute to the amount of CP violation needed to explain the observed baryon asymmetry. I will also show examples of Machine Learning approaches to improve the sensitivity to CP violation in Higgs couplings.

In a complementary way, I will present how high-precision frequency measurements in atoms and ions open up a quantum sensing window for searches for ultralight dark bosons.

Keywords: Higgs; CP violation; quantum sensing; baryogenesis; Dark Matter