Bound-state relativistic quantum electrodynamics: A perspective for precision physics with atoms and molecules

Á Nonn, Á Margócsy, E Mátyus - Journal of Chemical Theory and …, 2024‏ - ACS Publications
Precision physics aims to use atoms and molecules to test and develop the fundamental
theory of matter, possibly beyond the Standard Model. Most of the atomic and molecular …

Penning-trap measurement of the Q value of electron capture in 163Ho for the determination of the electron neutrino mass

C Schweiger, M Braß, V Debierre, M Door, H Dorrer… - Nature Physics, 2024‏ - nature.com
The investigation of the absolute scale of the effective neutrino mass remains challenging
due to the exclusively weak interaction of neutrinos with all known particles in the standard …

Improved Isotope-Shift-Based Bounds on Bosons beyond the Standard Model through Measurements of the Interval in

C Solaro, S Meyer, K Fisher, JC Berengut, E Fuchs… - Physical Review Letters, 2020‏ - APS
We perform high-resolution spectroscopy of the 3 d D 2 3/2-3 d D 2 5/2 interval in all stable
even isotopes of Ca A+(A= 40, 42, 44, 46, and 48) with an accuracy of∼ 20 Hz using direct …

Perspectives on testing fundamental physics with highly charged ions in Penning traps

K Blaum, S Eliseev, S Sturm - Quantum Science and Technology, 2020‏ - iopscience.iop.org
In Penning traps electromagnetic forces are used to confine charged particles under well-
controlled conditions for virtually unlimited time. Sensitive detection methods have been …

Direct -Value Determination of the Decay of

P Filianin, C Lyu, M Door, K Blaum, WJ Huang… - Physical Review Letters, 2021‏ - APS
The cyclotron frequency ratio of Os 187 29+ to Re 187 29+ ions was measured with the
Penning-trap mass spectrometer PENTATRAP. The achieved result of R= 1.000 000 013 …

High-precision mass measurement of doubly magic Pb

K Kromer, C Lyu, M Door, P Filianin, Z Harman… - The European Physical …, 2022‏ - Springer
The absolute atomic mass of 208 Pb has been determined with a fractional uncertainty of 7×
10-11 by measuring the cyclotron-frequency ratio R of 208 Pb 41+ to 132 Xe 26+ with the …

Observation of a low-lying metastable electronic state in highly charged lead by Penning-trap mass spectrometry

K Kromer, C Lyu, M Door, P Filianin, Z Harman… - Physical Review Letters, 2023‏ - APS
Highly charged ions (HCIs) offer many opportunities for next-generation clock research due
to the vast landscape of available electronic transitions in different charge states. The …

High-Precision Determination of Factors and Masses of and

F Heiße, M Door, T Sailer, P Filianin, J Herkenhoff… - Physical Review Letters, 2023‏ - APS
We present the measurements of individual bound electron g factors of Ne 20 9+ and Ne 22
9+ on the relative level of 0.1 parts per billion. The comparison with theory represents the …

[HTML][HTML] Fifth-force search with the bound-electron g factor

V Debierre, CH Keitel, Z Harman - Physics Letters B, 2020‏ - Elsevier
The use of high-precision measurements of the g factor of few-electron ions and its isotope
shifts is put forward as a probe for physics beyond the Standard Model. The contribution of a …

QED corrections to the correlated relativistic energy: One-photon processes

Á Margócsy, E Mátyus - The Journal of Chemical Physics, 2024‏ - pubs.aip.org
This work is a collection of initial calculations and formal considerations within the Salpeter–
Sucher exact equal-time relativistic quantum electrodynamics framework. The calculations …