Tetraquarks Production in Quark--Gluon Plasma with Diquarks

We present a way to calculate tetraquarks ratios for quark--gluon plasma with diquarks. The ratios of tetraquarks over baryons produced from quark matter are high than hadronic gas model limits. It is a better way to search for four-quark states in relativistic heavy ion collisions. It may become a criterion to judge whether quark--gluon plasma has formed to search for four-quark states in relativistic heavy ion collisions.