Observation of the effect of gravity on the motion of antimatter

The ALPHA collaboration at CERN recently observed the effect of gravitational acceleration on the motion of antihydrogen atoms in a new experiment called ALPHA-g. This poster will review our published result (Nature 621, 716–722, 2023): measurements show that the gravitational acceleration of antihydrogen is consistent with the expectation for standard gravity and rule out the possibility of repulsive gravity.