First transport of antimatter in a truck across CERN

par Jonathan Morgner (CERN)

lundi 1 juin 2026, 11:00 → 12:00 Europe/Paris

200/0-Auditorium - Auditorium P. Lehmann (IJCLab)

The pronounced imbalance between matter and antimatter in the universe motivates high precision comparisons of fundamental properties of matter–antimatter conjugates. At CERN’s Antiproton Decelerator, the BASE collaboration performs such tests using cryogenic Penning traps. We have achieved the most precise proton–antiproton charge to mass ratio comparison to date, with a fractional uncertainty of 16 parts per trillion and conducted the first direct high precision measurement of the antiproton magnetic moment with 1.5 ppb accuracy. Combined with our proton magnetic moment measurement, these results improve magnetic moment-based CPT tests by more than a factor of 3000. In parallel, we are implementing new techniques for sympathetic cooling of antiprotons and developing quantum logic-inspired spectroscopy methods. We are also constructing the transportable antiproton trap BASE-STEP to move precision antiproton measurements from CERN to dedicated laboratory space at Heinrich Heine University Düsseldorf. In this talk, I will introduce the scientific context, report on the recent success of the first antiproton road-transport, where a cloud of antiprotons was transported over the CERN campus using this transportable Penning Trap. Furthermore, I will discuss progress towards an improved measurement of the antiproton magnetic moment.