Göttingen 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 23: Searches/BSM II (Non-collider)
T 23.1: Vortrag
Dienstag, 1. April 2025, 16:15–16:30, ZHG010
Stringent Constraints on Pseudoscalar Couplings from Precision Hyperfine Splitting Measurements — •Cedric Quint1, Zoltán Harman1, Joerg Jaeckel2, Fabian Heiße1, Lutz Leimenstoll2, and Christoph H. Keitel1 — 1Max Planck Insitute for Nuclear Physics, Heidelberg, Germany — 2Institute for Theoretical Physics, Heidelberg, Germany
Axion-like particles and similar new pseudoscalar bosons coupled to nucleons and electrons are known to lead to spin-dependent forces in atoms and ions. Hyperfine structure measurements are a sensitive probe to this effect. Specific differences, which are meant to reduce uncertainties due to nuclear effects in hyperfine structure calculations and measurements, yield stringent bounds on these couplings. We show that existing measurements on Be provide competitive limits in the region mφ 100 keV. We find that measurements on Cs and B have discovery potential. We also discuss various other candidate elements and evaluate their prospects.
Keywords: Hyperfine Splitting; Axion-Like Particles; Specific Difference; Atomic Physics