STRONG NUCLEAR

The strong nuclear force, also known as the strong interaction, confines quarks into hadron particles such as protons and neutrons, and binds them to form atomic nuclei. Most of the mass of protons and neutrons is the result of the strong force. The carrier particle of the strong force are pi mesons or pions (now known as gluons). After the GUT (Grand Unified Theory) Era, the Electroweak Era occurred, in which the strong force unfroze from the weak force and electromagnetism, and became distinct.