Experiments at the Antimatter Facility of CERN

by Dr Stefan Ulmer (RIKEN (JP))

Friday 30 Apr 2021, 11:00 → 12:00 Europe/Zurich

CERN

The Standard Model of particle physics is both incredibly successful and glaringly incomplete. Among the questions left open is the striking imbalance of matter and antimatter in our universe, which inspires experiments to compare the fundamental properties of matter/antimatter conjugates with high precision. The collaborations at the antiproton decelerator of CERN are performing such high-precision comparisons using hydrogen/antihydrogen, protons/antiproton, and anti-protonic Helium. Using advanced methods from atomic, molecular und optical physics - such as traps, clocks and lasers – in recent years several record measurements were conducted. Among those are the 3000-fold improved measurement of the antiproton magnetic moment using non-destructive single particle spin-quantum-spectroscopy, the characterization of the 1S/2S transition in trapped antihydrogen with a fractional precision of 2 parts in a trillion, or the laser-spectroscopy based determination of the antiproton-to-electron mass ratio with a fractional resolution of 0.6 parts in a billion. Other experiments in the facility focus on tests of the weak equivalence principle by dropping antihydrogen in the gravitational field of the earth. 

In this talk, an overview on the experiments operated at the AD facility will be given and the most recent physics achievements made by the community will be reviewed. Specific emphasis will be put on the used AMO techniques and quantum technologies used in those precision studies, and an outlook on future experiments will be given.       

2021_DETECTOR-SEMINAR_SU_FINAL.pdf

Experiments at the Antimatter Facility of CERN.mp4