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Nature 419, 24-27 (5 September 2002) | doi:10.1038/419024a

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High-energy physics: The matter with antimatter

Michael Peskin

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The Universe is made of matter, not antimatter, and 'CP violation' in particle decays could be the reason. Results from experiments measuring this effect at last confirm the predictions of a 30-year-old theory.

Every elementary particle has an anti- particle, a counterpart with precisely the same mass and the opposite electric charge. It would seem natural that all of the interactions of antiparticles are just the opposite of those of particles.