  We consider the thermodynamics of the matter made up of equal number of
neutrons and protons and of scalar dibaryons. They interact via the exchange of
scalar and vector mesons. The interaction is taken into account in the mean
field approximation. The condensation of dibaryons in this matter and the phase
transition of matter to quark matter are considered. Possible signatures of
dibaryons in Heavy Ion Collisions are speculated on.
