Bulk observables at 5.02 TeV using quasiparticle anisotropic hydrodynamics

Abstract

We present comparisons between 3+1D quasiparticle anisotropic hydrodynamics (aHydroQP) predictions for a large set of bulk observables and experimental data collected in 5.02 TeV Pb-Pb collisions. We make aHydroQP predictions for identified hadron spectra, identified hadron average transverse momentum, charged particle multiplicity as a function of pseudorapidity, the kaon-to-pion ($K/\pi$) and proton-to-pion ($p/\pi$) ratios, and integrated elliptic flow. We compare to data collected by the ALICE collaboration in 5.02 TeV Pb-Pb collisions. We find that these bulk observables are quite well described by aHydroQP with an assumed initial central temperature of $T_0=630$ MeV at ${\tau }_0=0.25$ fm/c and a constant specific shear viscosity of $\eta /s=0.159$ and a peak specific bulk viscosity of $\zeta /s=0.048$. In particular, we find that the momentum dependence of the kaon-to-pion ($K/\pi$) and proton-to-pion ($p/\pi$) ratios reported recently by the ALICE collaboration are extremely well described by aHydroQP in the most central collisions.

8 pages, 5 multipanel figures

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• Far-from-equilibrium attractors for massive kinetic theory in the relaxation time approximation
• The impact of fluctuating initial conditions on bottomonium suppression in 5.02 TeV heavy-ion collisions
• Nonextensive hydrodynamics of boost-invariant plasmas
• Spectral functions of heavy quarkonia in a bulk-viscous quark gluon plasma
• Kaonic Hanbury-Brown-Twiss radii at 200 GeV and 5.02 TeV
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• Far-from-equilibrium attractors with a realistic non-conformal equation of state
• Non-equilibrium evolution of quarkonium in medium in the open quantum system approach
• A simple model to include initial-state and hot-medium effects in the computation of quarkonium nuclear modification factor