Mesons and Baryons are made up of quarks
Quarks have fractional charges and half spins
More than two quarks with equal spin in the same region would violate Pauli's exclusion principle
So a new parameter named colour charge was established for quarks
The colour charges were red, green and blue, analogous to the primary colours in human colour perception
Only combinations of colour charges that result in a neutral charge would be valid
In other words, colour must be conserved, with the net colour charge being zero
This would also explain particles with only two quarks by using anti-quarks which have anti-colours
Quarks are bound together by a binding force, mediated by Bosons called Gluons
When attempting to remove a quark

Chiral Symmetry breaking - quark confinement - Forming pions - Served as a prototype and an ingredient for the Higgs Mechanism
Vacuum Expectation Value of Higgs Field (246 GeV).

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