New critical point induced by the axial anomaly in dense QCD.
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.
Hatsuda
Tetsuo
T
Department of Physics, University of Tokyo, Japan.
Tachibana
Motoi
M
Yamamoto
Naoki
N
Baym
Gordon
G