Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 47: Axions/ALPs II

T 47.8: Vortrag

Mittwoch, 2. April 2025, 18:00–18:15, VG 0.110

Searching for New Physics with Nuclear Lineshape Data — •Fiona Kirk — PTB Braunschweig Germany — Leibniz University Hannover

Because of its potential as a nuclear clock state, the exceptionally low-lying isomer thorium-229m has been the subject of intense research for several decades. Recently, this state was laser-excited for the first time, bringing us an important step closer to the realisation of nuclear clocks, but also opening up new possibilities to search for new physics that couples to the quantum chromodynamics (QCD) sector.

In this talk I will describe how new physics might affect the shape of the nuclear resonance, and explain how nuclear lineshape data can already today set competitive bounds on ultra-light dark matter coupling to the QCD sector, or more generally, on the time variation of the QCD scale.

Keywords: beyond the Standard Model; quantum sensing