When it does so, each particle of matter produced is accompanied by an appropriate antiparticle.

ECONOMIST: Particle physics

B0 pair, it will also allow the operators to work out which is the particle and which the antiparticle.

ECONOMIST: How to build a B-factory

In particular, every type of particle of which matter is composed has an equal and opposite antiparticle composed of antimatter.

ECONOMIST: Particle physics

As every schoolboy knows, if you bring a particle and an antiparticle together, they annihilate each other in a burst of energy.

ECONOMIST: Particle physics

The frequency at which it happens is related to a small but significant difference between the mass of the particle and its antiparticle.

ECONOMIST: Cosmology and particle physics

The polarised photons were able to take the place of the particle and the antiparticle in Dr Hardy's thought experiment because they obey the same quantum-mechanical rules.

ECONOMIST: Physics and philosophy