| primordial quark | has definition All baryons and mesons are believed to be composed of quarks, which are elementary particles of fractional charge. In the high-density, hot-temperature phase of the very early universe, prolific numbers of quarks would have been present in equilibrium with the other elementary particles. As the universe expanded and cooled, some of these quarks may have been frozen out. To what extent independent free quarks could survive is an unresolved issue of elementary particle physics. |  |
| is a kind of quark | |
| quark | has antiparticle antiquark | |
| has spin 1/2 | |
| is a part of nucleon | |
| fermion | has quantum behavior Fermi-Dirac statistics | |
| obeys exclusion principle | |
| charged particle | is accelerated by electric or magnetic fields | |
| has charge non-zero | |
| particle | has frequency inversely proportional to the wavelength | |
| has wavelength inversely proportional to its momentum | |
| has mass | |
| hypothetical particle | has acceptance status hypothetical | |
| physical object | has location or center of gravity | |
| has angular momentum | |
| has velocity | |
| has momentum | |
| has temperature | |
| has volume | |
| has extent | |
| has material | |
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