- Dezso Horvath (Wigner RCP, Budapest (HU))
Tom Segal (Max-Planck-Institut für Kernphysik, Heidelberg, Germany)
THe-Trap is a Penning-trap mass spectrometer that aims to measure the atomic mass ratio of tritium to helium-3 with a relative uncertainty of 1 · 10−11 . To test the experiment’s accuracy and precision, we measured the mass ratio of carbon-12 to oxygen-16, which is one of the most precisely determined mass ratios . In 2014 we reported a measurement of this mass ratio with a...
Dr Beatrice Franke (ax-Planck-Institute of Quantum Optics, Garching)
Low energetic neutrons are stored inside the apparatus searching for a permanent electric dipole moment of the neutron at the Paul Scherrer Institute. Precisely comparing the Larmor precession frequency of the neutrons spins to that of cohabiting 199Hg atoms spins, allows to investigate possible exotic short range spin-dependent interactions. Such an interaction could be mediated by...
Prof. Savely G. Karshenboim (Max-Planck-Institut für Quantenoptik, Garching 85748, Germany and Pulkovo Observatory, St. Petersburg 196140, Russia)
There has been for a while a large discrepancy between the values of the proton charge radius measured by the Lamb shift in muonic hydrogen and by other methods. It has already been clear that theory of muonic hydrogen is reliable at the level of this discrepancy and an error there cannot be a reason for the contradiction. Still the status of theory at the level of the uncertainty of the...