General terms:
* High-energy particles: This is a broad term used in physics to describe particles with high kinetic energy.
* Relativistic particles: These are particles moving at speeds close to the speed of light, where relativistic effects become significant.
Specific types of particles:
* Cosmic rays: High-energy particles that originate from outer space and bombard the Earth's atmosphere.
* Beta particles: Electrons or positrons emitted during radioactive decay. These can move at high speeds.
* Neutrinos: Subatomic particles that interact very weakly with matter and can travel at speeds close to the speed of light.
* Electrons in accelerators: Electrons accelerated in particle accelerators can reach very high speeds.
The specific name for a fast-moving particle will depend on its origin, properties, and the context in which it is being discussed.
