Dynamics of the Cosmological Quark-Hadron Transition in a Matter   Dominated Universe: Distribution and Evolution of Baryon Inhomogeneities
  We study the dynamics of the quark-hadron transition for a scenario in which the Universe is matter dominated and a large amount of entropy is generated by decaying particles of mass 1--10 TeV, as suggested by a large class of superstring--inspired models. We estimate the nucleation rate and compute the mean separation between baryon fluctuations generated during the transition following their evolution up to the onset of primordial nucleosyntheisis. 
Ornella Pantano and Antonio Riotto