Antiprotons match protons in response to strong nuclear force
Collider experiment finds antimatter behaves just like ordinary matter
By Andrew Grant
Tightly bunched antiprotons stick together, just like their proton cousins.
Physicists sifting through subatomic shrapnel inside a particle accelerator have made the first analysis of the interaction between antiprotons, particles of antimatter that are negatively charged but otherwise nearly identical to protons. The findings, published online November 4 in Nature, reveal that the strong nuclear force securely binds antiprotons in close proximity with the same intensity that it does for protons inside the nuclei of atoms.