Up Quark, All dimensions Wiki

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The up quark or u quark (symbol: u) is the lightest of all quarks, a type of elementary particle, and a significant constituent of matter. It, along with the down quark, forms the neutrons (one up quark, two down quarks) and protons (two up quarks, one down quark) of atomic nuclei. It is part of the first generation of matter, has an electric charge of +2/3 e and a bare mass of 2.2±0.45 MeV/c2. Like all quarks, the up quark is an elementary fermion with spin 1/2, and experiences all four fundame