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New Critical Point Induced by the Axial Anomaly in Dense QCD

Tetsuo Hatsuda·Motoi Tachibana·Naoki Yamamoto·Gordon Baym
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Abstract

We study the interplay between chiral and diquark condensates within the framework of the Ginzburg-Landau free energy, and classify possible phase structures of two and three-flavor massless QCD. The QCD axial anomaly acts as an external field applied to the chiral condensate in a color superconductor and leads to a crossover between the broken chiral symmetry and the color superconducting phase, and, in particular, to a new critical point in the QCD phase diagram.

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Tetsuo Hatsuda, Motoi Tachibana, Naoki Yamamoto, Gordon Baym. 2006-10-02. New Critical Point Induced by the Axial Anomaly in Dense QCD. https://doi.org/10.1103/physrevlett.97.122001

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