Our group is part of the international collaboration GBAR (Gravitational Behavior of Antihydrogen at Rest), whose aim is to measure the effect of gravity on antihydrogen atoms in the gravitational field of the Earth. The GBAR experiment is currently being constructed at CERN. The production of antihydrogen goes through a series of steps involving the creation, trapping, and cooling of positrons and antiprotons, as well as the formation of positronium atoms. Our group contributes to the study of the cross-sections of antiproton-positronium reactions, the cooling and trapping of antimatter plasmas, and the investigation of exotic states of antimatter under extreme conditions. We also explore the cosmological consequences of the possible discovery of negative mass for antimatter particles.
GBAR will measure the effect of gravity on antihydrogen atoms