Boson
Gauge bosons carry fundamental forces. There are three known gauge bosons, which are elementary particles.  For example, the photon carries the electromagnetic force. The three types of gauge bosons are: photons for electromagnetism, gluons (eight kinds) for strong force, and W and Z bosons (three kinds) for weak force. Other theoretical gauge bosons are predicted, such as gravitons for gravity. The Higgs boson is another fundamental particle of a type called a scalar boson.