The Cosmic QCD Phase Transition, Quasi-baryonic Dark Matter and Massive   Compact Halo Objects
  We propose that the cold dark matter (CDM) is composed entirely of quark matter, arising from a cosmic quark-hadron transition. We denote this phase as "quasibaryonic", distinct from the usual baryons. We show that compact gravitational lenses, with masses around 0.5 (M_{\odot}), could have evolved out of the quasibaryonic CDM. 
Shibaji Banerjee, Abhijit Bhattacharyya, Sanjay K. Ghosh, Sibaji Raha,   Bikash Sinha and Hiroshi Toki