But the device can also accelerate antiprotons, the antimatter equivalents of protons with the same mass but negative electric charge.

Gamma rays with this characteristic energy are created by the mutual annihilation of electrons and their antimatter equivalents, positrons.

The protons' collisions with the nuclei of copper atoms produce huge sprays of particles, some of which are the antimatter equivalent of protons - antiprotons.

By sheer chance, the vacuum had shed slightly more electron-proton wormholes than their antimatter equivalent, positrons linked to antiprotons, before expanding and cooling to the point where particle production ceased.

Most conventional accelerators propel charged particles - negatively charged electrons, positively charged protons, or their antimatter equivalents - using devices called radio-frequency cavities.

Its antimatter equivalent is then a positron orbiting an antiproton.

They have managed to keep atoms of antihydrogen - the antimatter equivalent of hydrogen, the simplest element - trapped for 1,000 seconds, or 16 minutes and 40 seconds.

One beam consists of electrons; the other consists of their antimatter equivalents.

LEP will collide electrons and their antimatter equivalents, positrons.

These short-lived particles arise from the annihilation of electrons and their antimatter equivalents, positrons.