Antineutron — the neutron's antiparticle Antineutron The antineutron is the neutral antiparticle of the neutron, built from antiquarks. It shares mass and many properties with the neutron but has opposite quantum numbers and annihila…
Charm quark (c quark) Charm quark A second-generation quark with electric charge +2/3. The charm quark appears in charmed hadrons (J/ψ, D mesons, Λc), played a central role in 1970s particle physics and remains imp…
