Abstract
We present for the first time results on final hadron production, with and without strangeness content, in Ultrarelativistic Heavy Ion Collisions at RHIC and LHC center of mass energies obtained combining a full 3+1D relativistic Boltzmann transport approach with a statistical hadronization mechanism. The non-perturbative interaction between quarks and gluons is described by means of a quasi-particle approach that permits to have an Equation of State close to lattice QCD. The resulting framework naturally includes both shear and bulk viscous effects. The 3+1D full transport evolution is converted to hadrons by mean of a realistic freeze-out hypersurface considering all known hadron resonances and by performing resonance decays. We present results on charged-hadron multiplicity, identified-particle spectra and identified-particle elliptic flow of π, K and p produced at RHIC and LHC energies for different centralities.
Highlights
Relativistic viscous hydrodynamics is able to describe very well many observables in Ultra Relativistic Heavy Ion Collisions such as final hadron spectra and elliptic flow in the low pT region [1,2,3,4,5,6]. Such an approach makes use of a statistical hadronization mechanism [7,8,9] which converts the information contained in the energy-momentum tensor to final hadrons applying the CF (Cooper-Frye) formula [10] on a freeze-out hypersurface
A transport approach can self-consistently overcome both these problem because the one-particle distribution function is always known during the dynamical evolution
For these reasons we developed a transport approach at fixed η/s which permits to have direct comparison with viscous hydrodynamics and to investigate specific dissipation properties of quark-gluon plasma (QGP)
Summary
Relativistic viscous hydrodynamics is able to describe very well many observables in Ultra Relativistic Heavy Ion Collisions (uRHICs) such as final hadron spectra and elliptic flow in the low pT region [1,2,3,4,5,6] Such an approach makes use of a statistical hadronization mechanism [7,8,9] which converts the information contained in the energy-momentum tensor to final hadrons applying the CF (Cooper-Frye) formula [10] on a freeze-out hypersurface. This framework allows to put constraints on QGP properties: they are fixed from the beginning of a simulation and drive the dynamical evolution. In order to test the validity of our approach we perform statistical hadronization on a hydro-like freeze-out hypersurface at fixed temperature extracted with our code and we directly compare the resulting hadron observables with experimental data
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