Linked from
The 13 pages that link to Charm quark, each with the reason it gives.
MesonRelated: The J/ψ meson discovery exposed the charm quark and reshaped the quark model.
CharmoniumBroader topic: It is the heavy constituent shared by every charmonium state.
Up quarkCompared with: It shares the up quark’s charge but belongs to a heavier generation.
Burton RichterBroader topic: The J/ψ discovery provided compelling evidence for the charm quark.
Down quarkCompared with: Its opposite charge and higher generation contrast with the down quark.
J/ψ mesonBroader topic: One charm quark supplies each constituent pair in the J/ψ.