Antiprotons match protons in response to strong nuclear force | Science News



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Antiprotons match protons in response to strong nuclear force

Collider experiment finds antimatter behaves just like ordinary matter

1:00pm, November 4, 2015

PAIRING UP  Antiprotons are among the particles produced when gold nuclei collide inside a particle accelerator. For the first time, researchers at Brookhaven National Laboratory have measured the interaction between these antiprotons.

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.

The study provides insight into the structure of antimatter nuclei, which consist of bound antiprotons and antineutrons. It also adds to the tally of papers finding no differences in the behavior of antimatter and ordinary matter. Any discrepancy could help scientists determine why matter, and not antimatter, dominates the universe.

Physicists studying how protons interact

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