Superconducting phase transition in the Nambu - Jona-Lasinio model

Details Superconducting phase transition in the Nambu - Jona-Lasinio model Superconducting phase transition in the Nambu - Jona-Lasinio model

2003-06-13

arxiv.org/abs/hep-ph/0306114v1

Mod.Phys.Lett. A16 (2001) 1129-1138

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures

Scientific paper

10.1142/S0217732301004339

The Nambu - Bogoliubov - de Gennes method is applied to the problem of superconducting QCD. The effective quark-quark interaction is described within the framework of the Nambu - Jona-Lasinio model. The details of the phase diagram are given as a function of the strength of the quark-quark coupling constant $G^{\prime}$. It is find that there is no superconducting phase transition when one uses the relation between the coupling constants $G^{\prime}$ and $G$ of the Nambu - Jona-Lasinio model which follows from the Fierz transformation. However, for other values of $G^{\prime}$ one can find a rich phase structure containing both the chiral and the superconducting phase transitions.

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