Conveners
Session 7: Fundamental constants, atomic properties
- Krzysztof Pachucki (Faculty of Physics, University of Warsaw)
We report on new measurements of the $n$$=$2 Lamb shift in atomic hydrogen using the new frequency-offset separated-oscillatory-fields (FOSOF) technique. This measurement can be used to determine the proton rms charge radius, and therefore contributes to the resolution of the proton size problem. A measurement of the $J$$=$1 to $J$$=$2 $n$=2 triplet-P fine structure interval is measured with...
The rest masses of many light nuclei, e.g. the proton, deuteron, triton and helion are of great importance for metrology as well as in testing our current understanding of physics. For example the mass difference of triton and helion is used in an essential consistency check for the determination of the electron
antineutrino rest mass in the KATRIN experiment [1],[2]. However, light ions are...
The measurement of the masses and magnetic moments of the antiproton and the proton is a sensitive test of CPT invariance and the determination of fundamental constants. In our experiments we store and detect a single (anti)proton in cryogenic Penning traps with storage times longer than one year. We have performed the most precise comparison of the proton and antiproton charge-to-mass ratios...
We discuss the status of determinations of the strong coupling with special attention to using event shape observables based on data collected at the Large Electron Positron collider and theoretical predictions at highest accuracy available at present. We argue that such extractions can be competitive with lattice determinations if the observables are selected carefully such that both higher...
In the present report, localization properties of valence electronic density are studied for superheavy atoms in the range 112 ≤ Z ≤ 120. Atomic shell structure is revealed by means of electronic localization function in the Dirac-Fock approximation (ELF) [1]. Predictions for the radii and widths of the valence shells based on the ELF are compared with the radii and widths of the related...
Highly accurate excited state energies in H2 provide a reliable method for
determination of its ionization energy. We present H2SOLV - our numerical
package capable of high-precision calculations of $\Sigma$ and $\Pi$ bound
states of H2. Based on efficient method for calculations of two-center
two-electron integrals with wavefunction represented as a linear combination
of explicitly...
