The minimum amount of charge possible is that of quarks. But it also has mass. Why is there no charge without mass? Or is it there?
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The minimum amount of charge possible is that of quarks - Well, I would say that the minimum amount of charge possible is that of electrons ($e$), because quarks are not free particles. – Nemo Jan 21 '18 at 09:13
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Gluons are massless and they carry color charge. – Frederic Thomas Feb 05 '18 at 18:27