Bose-Einstein condensation of diquark molecules in three-flavor quark matter

Masakiyo Kitazawa, Dirk H. Rischke, Igor A. Shovkovy

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We study the phase diagram of strongly interacting matter with three quark flavors at low and intermediate densities and non-zero temperatures in the framework of an NJL-type model with four-point interactions. At large densities, when the interactions are weak due to asymptotic freedom, quarks form loosely bound Cooper pairs. However, when the density decreases, interactions become stronger and quark Cooper pairs transform smoothly into tightly bound diquark molecules. We find that such molecules are stable at low density and temperature and that they dissociate above a temperature Tdiss of the order of the chiral phase transition temperature Tc ∼ 170 MeV. We also explore the conditions under which these molecules undergo Bose-Einstein condensation (BEC). We find that BEC is only possible if we increase the attractive interaction in the diquark channel to (probably unrealistically) large values.

Original languageEnglish (US)
Pages (from-to)389-396
Number of pages8
JournalProgress of Theoretical Physics Supplement
Issue number168
StatePublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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