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Exactly.. old hat. Except that possibly they have managed to calculate the mass ratio more accurately.
Also, there is a mistake in the article:
"The odd thing is this: the mass of gluons is zero and the mass of quarks is only five per cent. Where, therefore, is the missing 95 per cent?" It is the other way around.. mass of proton/neutron is 5% of total mass of quarks "used" to make a proton...
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