Speed of sound, breaking of conformal limit and instabilities in quark-gluon plasma at finite baryon density

Abstract

The properties of the quark-gluon plasma(QGP) in the presence of baryon chemical potential are studied using the Field Correlator Method(FCM). At low densities the QGP thermodynamics with the colormagnetic confinement and the Polyakov line interaction is in good agreement with lattice data,and the speed of sound satisfies $C_s^2\le \frac{1}{3}$,but in the intermediate range of densities the speed of sound displays a singular behaviour and one needs density modifications of the Polyakov line interaction to avoid instabilities. In particular for ${\mu }_q>0.5$ GeV there exists a region in the $(\mu ,T)$ plane where $C_s^2$ violates the conformal limit. This behaviour is strongly connected to the properties of the Polyakov loop and its density dependence.

arXiv comment18 pages , 11 figures

References in corpus (33)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• The PHOBOS Perspective on Discoveries at RHIC
• The equation of state in (2+1)-flavor QCD
• New Forms of QCD Matter Discovered at RHIC
• Full result for the QCD equation of state with 2+1 flavors
• The QCD equation of state with dynamical quarks
• Heavy Ion Collisions: The Big Picture, and the Big Questions
• Physics of Strongly coupled Quark-Gluon Plasma
• Properties of hot and dense matter from relativistic heavy ion collisions
• QCD equation of state at nonzero chemical potential: continuum results with physical quark masses at order mu^2
• Perfect Fluidity of the Quark Gluon Plasma Core as Seen through its Dissipative Hadronic Corona
• Elliptic Flow: A Brief Review
• Phenomenological Review on Quark-Gluon Plasma: Concepts vs. Observations
• The QCD equation of state at finite density from analytical continuation
• The Fate of the Initial State Fluctuations in Heavy Ion Collisions. II The Fluctuations and Sounds
• Study of QCD Phase Diagram with Non-Zero Chiral Chemical Potential
• The Fate of the Initial State Fluctuations in Heavy Ion Collisions. III The Second Act of Hydrodynamics
• QCD thermodynamics with continuum extrapolated Wilson fermions I
• Study of the phase diagram of dense two-color QCD within lattice simulation
• Vacuum phase transition at nonzero baryon density
• Strong interaction and bound states in the deconfinement phase of QCD
• The QCD Equation of State to $\mathcal{O}({\mu }_B^4)$ from Lattice QCD
• The speed of sound and specific heat in the QCD plasma: hydrodynamics, fluctuations and conformal symmetry
• Observation of deconfinement in a cold dense quark medium
• New nonperturbative approach to the Debye mass in hot QCD
• Lattice calculation of the heavy quark potential at non-zero temperature
• QCD equation of state matched to lattice data and exhibiting a critical point singularity
• Universal Behaviors of Speed of Sound from Holography
• Magnetic confinement and the Linde problem
• Nonperturbative QCD thermodynamics in the external magnetic field
• The speed of sound in QGP and SU(3) Yang-Mills theory

Cited by in corpus (5)

• Remarks on nuclear matter: how an ${\omega }_0$ condensate can spike the speed of sound, and a model of $Z(3)$ baryons
• Criticality from Einstein-Maxwell-dilaton holography at finite temperature and density
• Speed of sound in dense matter and two families of compact stars
• Thermodynamics of quark-gluon plasma at finite baryon density
• Dense Quark-Gluon Plasma in strong magnetic fields