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Nambu Jona-Lasinio Model of q q Bose Einstein Condensation and pseudogap phase

P. Castorina, G. Nardulli, D. Zappala

hep-pharXiv:hep-ph/0505089

Abstract

We show the existence of a pseudogap phase in the Nambu Jona-Lasinio model of quark interactions. In the pseudogap phase chiral symmetry is restored but q q pseudoscalar mesons still exist and they are massive. Such a behavior is intermediate between a BCS superconductor and a Bose Einstein Condensate. We suggest the relevance of this phenomenon for an understanding of recent lattice QCD and experimental data.

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