The newly created quarks and antiquarks pair into mesons, producing additional pions and kaons.
The charm quarks are observed bound with charm antiquarks in mesons.
Higher means a stronger bias favoring quarks over antiquarks.
The small excess of quarks over antiquarks led to a small excess of baryons over antibaryons.
The additional particles may include quarks, antiquarks or gluons.
Symmetrically, three antiquarks with the colors antired, antiblue and antigreen can form a color-neutral antibaryon.
The combination of a bottom antiquark and a top quark is not thought to be possible because of the top quark's short lifetime.
Because mesons are made of one quark and one antiquark, they can be found in triplet and singlet spin states.
