AP-Seminar: First observation of single proton spin flips in a Penning trap

An experiment is presented which aims at the direct determination of the g-factor of a single proton isolated in a Penning trap. In the presence of a magnetic bottle of 300 mT/mm², single proton spin flips were observed for the very first time. The magnetic moment has been determined with a relative uncertainty of 8.9 × 10^-6. This represents a milestone towards the direct determination of the proton magnetic moment with extremely high precision. This breakthrough brings us closer to the possibility of testing matter-antimatter symmetry at a high precision level in the baryon sector.