Regular Article - Theoretical Physics
Bulk observables at 5.02 TeV using quasiparticle anisotropic hydrodynamics
Department of Basic Sciences, College of Education, Imam Abdulrahman Bin Faisal University, 34212, Dammam, Saudi Arabia
2 Department of Physics, Kent State University, 44242, Kent, OH, USA
Accepted: 15 November 2021
Published online: 22 November 2021
We compare predictions of 3+1D quasiparticle anisotropic hydrodynamics (aHydroQP) for a large set of bulk observables with experimental data collected in 5.02 TeV Pb–Pb collisions. We make predictions for identified hadron spectra, identified hadron average transverse momentum, charged particle multiplicity as a function of pseudorapidity, the kaon-to-pion () and proton-to-pion () ratios, identified particle and charged particle elliptic flow, and HBT radii. We compare to data collected by the ALICE collaboration in 5.02 TeV Pb–Pb collisions. We find that, based on available data, these bulk observables are well described by aHydroQP with an assumed initial central temperature of MeV at fm/c and a constant specific shear viscosity of , which corresponds to a peak specific bulk viscosity of . In particular, we find that the momentum dependence of the kaon-to-pion () and proton-to-pion () ratios reported recently by the ALICE collaboration are extremely well described by aHydroQP in the 0–5% centrality class.
© The Author(s) 2021
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