In the two-flavor linear sigma model with quarks, the chiral phase transition at T=0 is first order and occurs at a quark chemical potential equal to the vacuum quark mass.
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In large-Nc QCD at finite isospin density, an intermediate regime Lambda_QCD <= mu_I <= sqrt(Nc) Lambda_QCD hosts quarkyonic meson matter consisting of a filled Fermi sea of quarks bound into mesons on the QCD scale, possibly with surface Bose condensation or Cooper pairing.
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Chiral first order phase transition at finite baryon density and zero temperature from self-consistent pole masses in the linear sigma model with quarks
In the two-flavor linear sigma model with quarks, the chiral phase transition at T=0 is first order and occurs at a quark chemical potential equal to the vacuum quark mass.
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Quarkyonic Meson Matter for Finite Isospin Density
In large-Nc QCD at finite isospin density, an intermediate regime Lambda_QCD <= mu_I <= sqrt(Nc) Lambda_QCD hosts quarkyonic meson matter consisting of a filled Fermi sea of quarks bound into mesons on the QCD scale, possibly with surface Bose condensation or Cooper pairing.