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You are a theory guy, right? ;-)
10^(-18)m is experimentally tested, point is what the theory says.

But more important you have a typo
"but a quark is a composite particle containing three quarks", should be proton is a composite particle...

Der Amerikaner ist die Orchidee unter den Menschen
Volker Pispers

by Martin (weiser.mensch(at)googlemail.com) on Fri Feb 22nd, 2008 at 04:02:56 PM EST
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