最終更新日:2024/07/28
(physics) A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV. / Symbol: u
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up quark
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(physics) A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV. / Symbol: u
up quark