In the pion superfluid phase of isospin QCD, the neutral pion mass grows exactly twice the isospin chemical potential, while stronger axial anomaly softens the equation of state and reduces the sound velocity peak.
On the phase structure and thermodynamics of QCD
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abstract
We discuss the phase structure and thermodynamics of QCD by means of dynamical chiral effective models. Quark and meson fluctuations are included via the functional renormalization group. We study the influence of confinement in addition to the impact of fluctuations by comparing the results of the chiral models to their Polyakov-loop extended versions. Furthermore, we discuss the mass sensitivity of the phase structure and thermodynamics and find interesting modifications close to the chiral limit.
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A coupled DSE-FRG-holographic model predicts the QCD critical end point at T_CEP approximately 130-135 MeV and mu_B,CEP approximately 600 MeV, with sensitivity to regulator and normalization choices.
Gaussian fluctuations make the quark meson model predict a non-monotonic nucleon mass and a faster-growing nucleon radius as temperature and density increase.
In the Quark-Meson model, analytic continuation from imaginary to real chemical potential reproduces the chiral phase boundary only up to mu_conv about 146 MeV and has about 150 percent error near the critical endpoint.
Rotation lowers critical temperatures for chiral and deconfinement transitions in the Polyakov linear sigma model under causality constraints, with mechanical properties computed in the homogeneous limit.
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Meson mass spectrum in isospin QCD medium from the $N_f=2+1$ quark-meson model
In the pion superfluid phase of isospin QCD, the neutral pion mass grows exactly twice the isospin chemical potential, while stronger axial anomaly softens the equation of state and reduces the sound velocity peak.
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Unified Functional-Holographic Theory of the QCD Critical End Point
A coupled DSE-FRG-holographic model predicts the QCD critical end point at T_CEP approximately 130-135 MeV and mu_B,CEP approximately 600 MeV, with sensitivity to regulator and normalization choices.
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The nucleon properties in finite temperature and density with Gaussian fluctuations
Gaussian fluctuations make the quark meson model predict a non-monotonic nucleon mass and a faster-growing nucleon radius as temperature and density increase.
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Assessing the Reconstruction of the Critical Line in the QCD Phase Diagram from Imaginary to Real Chemical Potential
In the Quark-Meson model, analytic continuation from imaginary to real chemical potential reproduces the chiral phase boundary only up to mu_conv about 146 MeV and has about 150 percent error near the critical endpoint.
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Linear sigma model with quarks and Polyakov loop in rotation: phase diagrams, Tolman-Ehrenfest law and mechanical properties
Rotation lowers critical temperatures for chiral and deconfinement transitions in the Polyakov linear sigma model under causality constraints, with mechanical properties computed in the homogeneous limit.