QCD Critical Points and Their Associated Soft Modes

Abstract

The mean-field level calculation shows that the QCD matter can have multiple critical points incorporating the color superconductivity under charge neutrality constraint due to the repulsive vector interaction; this actually implies that the QCD matter is very soft for a simultaneous formation of diquark and chiral condensates coupled with the baryonic density. Dynamical density fluctuations are analyzed as possible soft modes around the QCD critical point using dissipative relativistic fluid dynamics. It is found that the entropy fluctuation solely gets enhanced while the sound modes due to mechanical density fluctuations are strongly attenuated around the QCD CP, which may suggest a suppression or even total disappearance of Mach cone at the CP.

8 pages, 3 figures. Talk presented at Yukawa International workshop "New Frontiers in QCD 2010 --- Exotic Hadron Systems and Dense Matter ---" (NFQCD10), Jan. 18(Mon.)-Mar.19(Fri), 2010, Yukawa Institute for Theoretical Physics, Kyoto, Japan

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Cited by in corpus (7)

• Phase diagrams in nonlocal PNJL models constrained by Lattice QCD results
• Thermodynamics of quark quasi-particles ensemble
• Fate of separate chiral transitions at finite ${\mu }_I$ under the influence of mismatched vector interactions
• Correction to the Chiral Magnetic Effect from axial-vector interaction
• System-size scan of dihadron azimuthal correlations in ultra-relativistic heavy ion collisions
• Combined chiral and diquark fluctuations along QCD critical line and enhanced baryon production with parity doubling
• Towards thermodynamics of the quark quasi-particles