Particle Physics

The discovery of several elementary particles has been associated with:

investigations of cosmic rays.

There are four types of interactions among particles:

gravitational, electromagnetic, strong and weak.

The electromagnetic interaction provides:

a force between two charges.

The weak interaction is always responsible for:

all radioactive decays.

There are two types of elementary particles:

quanta of force and matter particles.

There are two types of matter particles:

leptons and hadrons.

For every particles that exists in nature:

there is a corresponding antiparticle.