Spectral function of fermions in a highly occupied non-Abelian plasma

Abstract

We develop a method to obtain fermion spectral functions non-perturbatively in a non-Abelian gauge theory with high occupation numbers of gauge fields. After recovering the free field case, we extract the spectral function of fermions in a highly occupied non-Abelian plasma close to its non-thermal fixed point, i.e., in a self-similar regime of the non-equilibrium dynamics. We find good agreement with hard loop perturbation theory for medium-induced masses, dispersion relations and quasiparticle residues. We also extract the full momentum dependence of the damping rate of the collective excitations.

arXiv comment13 pages, 6 figures; v2: minor revision, data and plot files attached, published in Phys. Lett. B

References in corpus (41)

• Reheating in Inflationary Cosmology: Theory and Applications
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• Some Features of the Glasma
• The Quark-Gluon Plasma: Collective Dynamics and Hard Thermal Loops
• Introduction to Nonequilibrium Quantum Field Theory
• Basics of thermal field theory -- a tutorial on perturbative computations
• Turbulent Thermalization
• Turbulent thermalization process in heavy-ion collisions at ultrarelativistic energies
• Universal attractor in a highly occupied non-Abelian plasma
• Hard Loop Approach to Anisotropic Systems
• Perturbative Thermal QCD: Formalism and Applications
• On the equivalence between the Boltzmann equation and classical field theory at large occupation numbers
• Pre-equilibrium dilepton production from an anisotropic quark-gluon plasma
• The First fm/c of Heavy-Ion Collisions
• Turbulence in nonabelian gauge theory
• UV Cascade in Classical Yang-Mills Theory
• Off-equilibrium sphaleron transitions in the Glasma
• UV Cascade in Classical Yang-Mills via Kinetic Theory
• Basin of attraction for turbulent thermalization and the range of validity of classical-statistical simulations
• The Boltzmann Equation in Classical and Quantum Field Theory
• Fermion production from real-time lattice gauge theory in the classical-statistical regime
• Real-Time Dynamics with Fermions on a Lattice
• Non-equilibrium study of the Chiral Magnetic Effect from real-time simulations with dynamical fermions
• Role of quantum fluctuations in a system with strong fields: Spectral properties and Thermalization
• Over-populated gauge fields on the lattice
• Spectral function for overoccupied gluodynamics from real-time lattice simulations
• Jet momentum broadening in the pre-equilibrium Glasma
• Turbulent thermalization of weakly coupled non-abelian plasmas
• Comment on ``High Temperature Fermion Propagator -- Resummation and Gauge Dependence of the Damping Rate''
• Intermediate mass dileptons as pre-equilibrium probes in heavy ion collisions
• Chiral instabilities & the onset of chiral turbulence in QED plasmas
• Spectral function at high temperature in the classical approximation
• Spectral functions and critical dynamics of the $O(4)$ model from classical-statistical lattice simulations
• Spectral functions and dynamic critical behavior of relativistic $Z_2$ theories
• Breaking the Fluctuation-Dissipation Relation by Universal Transport Processes
• Initial state and thermalization in the Color Glass Condensate framework
• Highly occupied gauge theories in 2+1 dimensions: self-similar attractor
• Time evolution of linearized gauge field fluctuations on a real-time lattice
• Unraveling the nature of universal dynamics in $O(N)$ theories
• Broad excitations in a 2+1D overoccupied gluon plasma
• Fermionic excitations at finite temperature and density

Cited by in corpus (6)

• Heavy Quark Momentum Broadening in a Non-Abelian Plasma away from Thermal Equilibrium
• Jet quenching parameter in QCD kinetic theory
• Prescaling relaxation to nonthermal attractors
• Effect of mesonic off-shell correlations in the PNJL equation of state
• Soft-gluon exchange matters: isotropic screening in QCD kinetic theory
• Real-time correlators in 3+1D thermal lattice gauge theory