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arXiv · hep-ph/0309101

First Order Chiral Phase Transition from a Six-fermion ''Instanton''-Interaction

Joerg Jaeckel·Christof Wetterich
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Abstract

We compute the first order chiral phase transition for an instanton motivated quark model with a local six-quark interaction. In order to compare different solutions of the gap equation we compute the bosonic effective action -- a two particle irreducible free energy functional. We find that the first order transition ends for a critical current quark mass, with continuous crossover for larger quark masses. Furthermore, we investigate different possible order parameters, including a color octet condensate. We also compare our formalism with mean field theory.

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Joerg Jaeckel, Christof Wetterich. 2003-09-09. First Order Chiral Phase Transition from a Six-fermion ''Instanton''-Interaction. https://doi.org/10.1016/j.nuclphysa.2003.11.060

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