ALL meanings of up quark
up quark
U u - noun up quark the quark having electric charge 2/3 times the elementary charge and strangeness and charm equal to 0. 1
- noun up quark a type of quark with a mass of c. 0.002 to 0.008 GeV/c2, a positive charge that is 2⁄3 that of an electron, zero charm, and zero strangeness 0
- noun up quark A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV. Symbol: u. 0