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Gauge boson

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The Standard Model of elementary particles Gauge bosons are in the fourth column in red

Gauge bosons are carrier particles for three of the four fundamental forces. In the Standard Model of particle physics, there are four kinds of gauge bosons. The three gauge bosons are as follows:

  1. W and Z bosons, which carry the weak force
  2. Gluons, which carry the strong force
  3. Photons, which carry the electromagnetic force

The only remaining fundamental force that has no known gauge boson is gravity. The theoretical gauge boson for gravity is called a graviton.

All gauge bosons are bosons, which simply means that two or more of them can exist in the same place at the same time, unlike fermions. It also means that gauge bosons have a spin of 0, 1, or 2.

Gauge bosons are thought to interact with the Higgs field. This theoretical field is believed by many scientists to be responsible for why some gauge bosons – like W and Z bosons – have mass, while others – such as photons – do not have mass.