The two fields can interact through the interactions of ordinary particles if the energy of the interaction is sufficiently high.

Sites deep underground screen many ordinary particles that can confuse the researchers.

Antiparticles combine in the same manner as ordinary particles.

The physicists do that by smashing together ordinary particles in accelerators.

But when an ordinary particle is accelerated to a high velocity, up close to light speed, relativity takes over.

They could be really travelling just like any other ordinary particle, on a same straight line.

One curious effect is that, unlike ordinary particles, the speed of a tachyon increases as its energy decreases.

Nanoparticles do not have the same toxic characteristics as ordinary particles.

The longer the virtual particle exists, the closer its characteristics come to those of ordinary particles.

A "virtual" particle that exists for an arbitrarily long time is simply an ordinary particle.