What Is the Universe Ultimately Made of?

As the ultimate building blocks of the universe, the limit structureless quark u∞ and its anti-quark are considered at the infinite sublayer level of the quark model. Then CP is violated in the doublet of u∞ and u∞CP quarks to account for the asymmetry of the number of particles and anti-particles. This CP violation is explained by a SU(2) noncommutative geometry. The second, third and fourth generation quarks are considered only as the excited states of the first generation u∞ and u∞CP quarks. The fourth generation quarks are derived from both CPT transformation and the SU(2)L×U(1) gauge theory. The dark matter, quarks, leptons, gauge bosons and Higgs bosons are composed of only the u∞ and u∞CP quarks and the cosmological constant in Einstein’s field equation is also derived from the Higgs potential. Thus, the limit particle u∞ and its anti-particle u∞CP are the ultimate particles of the universe and produced thermally in the hot early universe of the Big Bang.