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Gluons are vector gauge bosons that mediate strong interactions of quarks and themselves in quantum chromodynamics. There are eight of them, as they are in the adjoint representation of the SU(3) color group, and carry the color charge of the strong force, which results into the binding of hadrons.

Gluons are vector gauge bosons that mediate strong interactions of quarks and themselves in quantum chromodynamics. There are eight of them, as they are in the adjoint representation of the SU(3) color group, and carry the color charge of the strong force, which results into the binding of hadrons.