An exotic particle is a kind of theoretical particle said to exist by some areas of modern physics, and whose alleged properties are extremely unusual.

The best-known example is probably the tachyon, a theoretical particle that always travels faster than light.

One of the theoretical particle that could do this is called a WIMP, for weakly interactive massive particles.

Since top quarks are so massive, scientists have been able to make predictions about the mass of the theoretical particle known as a Higgs Boson.

To Chadwick, this was evidence of something that he and Rutherford had been hypothesising for years: the neutron, a theoretical nuclear particle with no electric charge.

Other claimed potential risks include the creation of theoretical particles called strangelets, magnetic monopoles and vacuum bubbles.

"A theoretical particle in quantum mechanics that can contain a universe," the sergeant replied.

Theoretical condensed matter physics shares important concepts and techniques with theoretical particle and nuclear physics.

Replies: Tachyons are hypothetical or theoretical particles that travel faster than the speed of light.

Particles found in antimatter are not theoretical particles because they have been found in numerous experiments.