New constraints for QCD matter from improved Bayesian parameter estimation in heavy-ion collisions at LHC

Abstract

The transport properties of quark-gluon plasma created in relativistic heavy-ion collisions are quantified by an improved global Bayesian analysis using the CERN Large Hadron Collider Pb--Pb data at $\sqrt{s_{\text{NN}}}=2.76$ and $5.02$TeV. The results show that the uncertainty of the extracted transport coefficients is significantly reduced by including new sophisticated collective flow observables from two collision energies for the first time. This work reveals the stronger temperature dependence of specific shear viscosity, a lower value of specific bulk viscosity, and a higher hadronization switching temperature than in the previous studies. The sensitivity analysis confirms that the precision measurements of higher-order harmonic flow and their correlations are crucial in extracting accurate values of the transport properties.

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Cited by in corpus (8)

• 50 Years of Quantum Chromodynamics
• Information field based global Bayesian inference of the jet transport coefficient
• Flow correlations from a hydrodynamics model with dynamical freeze-out and initial conditions based on perturbative QCD and saturation
• Assessing the ultracentral flow puzzle in hydrodynamic modeling of heavy-ion collisions
• Characterizing the initial and final state effects of relativistic nuclear collisions
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• Bayesian Inference of the Specific Shear and Bulk Viscosities of the Quark-Gluon Plasma at Crossover from $\varphi$ and $\Omega$ Observables
• Applicability of Hydrodynamics in Hadronic Phase of Heavy-Ion Collisions