Shear viscosity from perturbative Quantum Chromodynamics to the hadron resonance gas at finite baryon, strangeness, and electric charge densities
arXiv:2406.04968 · doi:10.1103/gckr-c2yg
Abstract
Through model-to-data comparisons from heavy-ion collisions, it has been shown that the Quark Gluon Plasma has an extremely small shear viscosity at vanishing densities. At large baryon densities, significantly less is known about the nature of the shear viscosity from Quantum Chromodynamics (QCD). Within heavy-ion collisions, there are three conserved charges: baryon number (B), strangeness (S), and electric charge (Q). Here we calculate the shear viscosity in two limits using perturbative QCD and an excluded-volume hadron resonance gas at finite BSQ densities. We then develop a framework that interpolates between these two limits such that shear viscosity is possible to calculate across a wide range of finite BSQ densities. We find that the pQCD and hadron resonance gas calculations have different BSQ densities dependence such that a rather non-trivial shear viscosity appears at finite densities.
References in corpus (24)
- Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
- Computational complexity and fundamental limitations to fermionic quantum Monte Carlo simulations
- Viscosity Bound and Causality Violation
- Effect of curvature squared corrections in AdS on the viscosity of the dual gauge theory
- Beyond eta/s = 1/4pi
- Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
- Matching Excluded Volume Hadron Resonance Gas Models and Perturbative QCD to Lattice Calculations
- Repulsive baryonic interactions and lattice QCD observables at imaginary chemical potential
- Viscosity coefficients for hadron and quark-gluon phases
- Hadron Resonance Gas Equation of State from Lattice QCD
- Fast Equilibration of Hadrons in an Expanding Fireball
- Bulk and shear viscosities of hot and dense hadron gas
- QCD Equation of State at Finite Chemical Potentials for Relativistic Nuclear Collisions
- Simple Solution to the Strangeness Horn Description Puzzle
- New scenarios for hard-core interactions in a hadron resonance gas
- Understanding the ratio at LHC due to QCD mass spectrum
- Chemical equilibration due to heavy Hagedorn states
- Critical lensing and kurtosis near a critical point in the QCD phase diagram in and out-of-equilibrium
- Bulk and Shear Viscosity in Hagedorn Fluid
- A brief overview of hard-thermal-loop perturbation theory
- Curvature of the chiral phase transition line from the magnetic equation of state of (2+1)-flavor QCD
- Hot and Dense QCD Shear Viscosity at Leading Log
- Far-off-equilibrium expansion trajectories in the QCD phase diagram
- Correlations between nuclear incompressibility, liquid-gas critical point, and quarkyonic transition