Quark spectral density and a strongly-coupled QGP

Abstract

The maximum entropy method is used to compute the dressed-quark spectral density from the self-consistent numerical solution of a rainbow truncation of QCD's gap equation at temperatures above that for which chiral symmetry is restored. In addition to the normal and plasmino modes, the spectral function also exhibits an essentially nonperturbative zero mode for temperatures extending to 1.4-1.8-times the critical temperature, T_c. In the neighbourhood of T_c, this long-wavelength mode contains the bulk of the spectral strength and so long as this mode persists, the system may fairly be described as a strongly-coupled state of matter.

4 pages, 2 figures

References in corpus (30)

• Dyson-Schwinger Equations and the Application to Hadronic Physics
• The QCD transition temperature: results with physical masses in the continuum limit II.
• Dyson-Schwinger Equations: Density, Temperature and Continuum Strong QCD
• Dyson-Schwinger equations: a tool for hadron physics
• The Quark-Gluon Plasma: Collective Dynamics and Hard Thermal Loops
• Goldstone Theorem and Diquark Confinement Beyond Rainbow-Ladder Approximation
• Phase diagram and critical endpoint for strongly-interacting quarks
• Hadron Properties and Dyson-Schwinger Equations
• Extracting the QGP viscosity from RHIC data -- a status report from viscous hydrodynamics
• Pseudogap effects induced by resonant pair scattering
• Aspects of Hadron Physics
• Chiral and deconfinement transition from Dyson-Schwinger equations
• Continuum study of deconfinement at finite temperature
• Infrared properties of propagators in Landau-gauge pure Yang-Mills theory at finite temperature
• Regarding confinement and dynamical chiral symmetry breaking in QED3
• Dynamical chiral symmetry breaking and a critical mass
• Chiral susceptibility and the scalar Ward identity
• T-dependence of pseudoscalar and scalar correlations
• Facets of confinement and dynamical chiral symmetry breaking
• $\bar{q}q$ condensate for light quarks beyond the chiral limit
• Quark propagator at finite temperature and finite momentum in quenched lattice QCD
• Quark spectral properties above Tc from Dyson-Schwinger equations
• Quark Spectrum above but near Critical Temperature of Chiral Transition
• Extraction of Spectral Functions from Dyson-Schwinger Studies via the Maximum Entropy Method
• Mean field exponents and small quark masses
• Novel Collective Excitations and the Quasi-Particle Picture of Quarks Coupled with a Massive Boson at Finite Temperature
• Spectral properties of massless and massive quarks coupled with massive boson at finite temperature
• Vacuum pseudoscalar susceptibility
• Analytic Properties of Finite-Temperature Self-Energies
• Temperature Dependence of the Effective Bag Constant and the Radius of a Nucleon in the Global Color Symmetry Model of QCD

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• Collective perspective on advances in Dyson-Schwinger Equation QCD
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• A Novel Algorithm for Extracting the Parton Distribution Amplitude from the Euclidean Bethe-Salpeter Wave Function
• Zero mode in a strongly coupled quark gluon plasma
• Practical scheme from QCD to phenomena via Dyson-Schwinger equations
• Spontaneous chiral symmetry breaking in the massive Landau gauge: realistic running coupling
• Vanishing Thermal Mass in the Strongly Coupled QCD/QED medium
• Thermal mass and dispersion relations of quarks in the deconfined phase of quenched QCD
• Structure of a thermal quasifermion in the QCD/QED Medium
• Charmonium Spectral Functions and Transport Properties of Quark-Gluon Plasma
• Ultra-soft fermionic excitation at finite chemical potential
• Ultrasoft fermion mode and off-diagonal Boltzmann equation in quark-gluon plasma at high temperature
• Fermionic excitations at finite temperature and density
• Thermalization and dynamical spectral properties in the quark-meson model
• Chiral symmetry restoration and properties of Goldstone bosons at finite temperature
• Recent progress in hard-thermal-loop QCD thermodynamics and collective excitations
• Possible generation of anomalously soft quark excitations at nonzero temperature: Nonhyperbolic dispersion of parapion and van Hove singularity
• New insight on the quark condensate beyond chiral limit
• Spectral density constraints in quantum field theory
• Neutrino spectral density at electroweak scale temperature
• Extending the truncated Dyson-Schwinger equation to finite temperatures
• Pseudo-scalar {\boldm $q\bar{q}$} bound states at finite temperatures within a Dyson-Schwinger--Bethe-Salpeter approach
• Flavor dependence of the thermal dissociations of vector and axial-vector mesons
• Emergence of soft quark excitations by the coupling with a soft mode of the QCD critical point
• Finite Temperature Landau Gauge Lattice Quark Propagator
• Constraining the Hadron-Quark Phase Transition Chemical Potential via Astronomical Observation
• Chemical Freeze-out Parameters via a Non-perturbative QCD Approach
• Pion superfluid phase transition at finite isospin chemical potential