Revisiting Bayesian constraints on the transport coefficients of QCD

Understand

Multistage models based on relativistic viscous hydrodynamics have proven successful in describing hadron measurements from relativistic nuclear collisions.

• These measurements are sensitive to the shear and the bulk viscosities of QCD and provide a unique opportunity to constrain these transport coefficients.
• Bayesian analyses can be used to obtain systematic constraints on the viscosities of QCD, through methodical model-to-data comparisons.
• In this manuscript, we discuss recent developments in Bayesian analyses of heavy ion collision data.