150 research outputs found
The iEBE-VISHNU code package for relativistic heavy-ion collisions
The iEBE-VISHNU code package performs event-by-event simulations for
relativistic heavy-ion collisions using a hybrid approach based on
(2+1)-dimensional viscous hydrodynamics coupled to a hadronic cascade model. We
present the detailed model implementation, accompanied by some numerical code
tests for the package. iEBE-VISHNU forms the core of a general theoretical
framework for model-data comparisons through large scale Monte-Carlo
simulations. A numerical interface between the hydrodynamically evolving medium
and thermal photon radiation is also discussed. This interface is more
generally designed for calculations of all kinds of rare probes that are
coupled to the temperature and flow velocity evolution of the bulk medium, such
as jet energy loss and heavy quark diffusion.Comment: 47 pages, 21 figures. Manuscript was accepted by Computer Physics
Communication
Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at sNN =5.02 TeV at the CERN Large Hadron Collider
This Letter reports on the first measurements of transverse momentum dependent flow angle ψn and flow magnitude vn fluctuations determined using new four-particle correlators. The measurements are performed for various centralities in Pb-Pb collisions at a center-of-mass energy per nucleon pair of sNN = 5.02 TeV with ALICE at the CERN Large Hadron Collider. Both flow angle and flow magnitude fluctuations are observed in the presented centrality ranges and are strongest in the most central collisions and for a transverse momentum pT>2GeV/c. Comparison with theoretical models, including iEBE-VISHNU, MUSIC, and AMPT, show that the measurements exhibit unique sensitivities to the initial state of heavy-ion collisions
Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at sNN=5.02TeV at the CERN Large Hadron Collider
This Letter reports on the first measurements of transverse momentum dependent flow angle n and flow magnitude vn fluctuations determined using new four-particle correlators. The measurements are performed for various centralities in Pb–Pb collisions at a center-of-mass energy per nucleon pair of √s NN = 5.02 TeV with ALICE at the CERN Large Hadron Collider. Both flow angle and flow magnitude fluctuations are observed in the presented centrality ranges and are strongest in the most central collisions and for a transverse momentum pT > 2 GeV/c. Comparison with theoretical models, including iEBE-VISHNU, MUSIC, and AMPT, show that the measurements exhibit unique sensitivities to the initial state of heavy-ion collisions
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