Bound diquarks and their Bose-Einstein condensation in strongly coupled quark matter

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

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

We explore the formation of diquark bound states and their Bose-Einstein condensation (BEC) in the phase diagram of three-flavor quark matter at nonzero temperature, T, and quark chemical potential, μ. Using a quark model with a four-fermion interaction, we identify diquark excitations as poles of the microscopically computed diquark propagator. The quark masses are obtained by solving a dynamical equation for the chiral condensate and are found to determine the stability of the diquark excitations. The stability of diquark excitations is investigated in the T - μ plane for different values of the diquark coupling strength. We find that diquark bound states appear at small quark chemical potentials and at intermediate coupling strengths. Bose-Einstein condensation of non-strange diquark states occurs when the attractive interaction between quarks is sufficiently strong.

Original languageEnglish (US)
Pages (from-to)228-233
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume663
Issue number3
DOIs
StatePublished - May 22 2008
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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