From search of external encyclopedias: From search of external encyclopedias:
J/Psi meson (Physics) [Mesons] Whether these were quarks or something else was not known at ... Jpsi meson (Physics) [Onia] [Mesons] Whether these were quarks or something else was not known at ... Double-charm tetraquark (Physics) [Subatomic particles with spin 1] [Large Hadron Collider] [Mesons] Type of tetraquark ...
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