Q.No. 18: - Which quarks made most of the mass of hadrons and how? Give an example also.

Q.No. 18: - Which quarks made most of the mass of hadrons and how? Give an example also.

Answer: - Most of the mass of hadrons is made up of Gluons. Gluons basically are massless particles but  they possess energy more specifically, quantum chromodynamics binding energy(QCBE) and it is this that contributes so greatly to the overall mass of the hadron.
         For example, a proton has a mass of approximately 938MeV/c2, of which the rest mass of its three valence quarks only contributes about 9MeV/c2, much of the remainder can be attributed to the field energy of the gluons.

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