Research NewsPhysics

Putting Antimatter on the Scales

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Science  05 Jun 1998:
Vol. 280, Issue 5369, pp. 1526
DOI: 10.1126/science.280.5369.1526b

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Alexander Hellemans Modern physics holds that particles of antimatter and those of matter are perfect counterparts, down to their mass. Now an international team has caged a proton and an antiproton in a trap and deduced that they have the same mass to within a part in 10 billion, reinforcing the existing theory of particles and forces.