An everyday example of the strong force is binding of nucleons into nuclei and this strong force is explained by the fundamental interactions among quarks and gluons. Mesons and baryons are together called hadrons.
Gluons are the carrier of the strong force.
The behavior of a gluon system at finite temperature is investigated on Raptor and the light hadron masses are calculated on Raptor, Trex, and Delta. In ordinary circumstances, quarks are confined in hadrons permanently. However, at high temperature, quarks are deconfined and roam around freely. Between these two phases, there is a weak first-order phase transition when dynamical effect of quarks is neglected. The relative weakness of this finite temperature phase transition is a puzzling question.