The asymmetry in the production of these particles is measured by the experiment at Fermilab using the Drell–Yan process. (-5[1])That experiment observes the “sea” type of these particles, which are contrasted with their “valence” type. In the most common decay mode, the Higgs boson decays into one of these particles and its antiparticle. (10[1]-5[1])Mixing angles determined by (-5[1])the CKM (10[1])matrix describe (-5[2])transformations between (-5[1])types (10[1])of these (-5[1])particles mediated (-5[1])by the weak interaction. (-5[1])In the November Revolution, (-5[1])the fourth (10[1])one of these particles was confirmed with the discovery of the J/psi meson. Experiments at (-5[1])SLAC verified the (10[1])existence of these (10[1])particles through the discovery of deep inelastic scattering. For 10 points, name these particles with a two-thirds or negative one-third charge whose up and down types (10[2])make up protons. (10[2])■END■ (10[7])