CERN Accelerating science

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1.
A perturbative approach to the hydrodynamics of heavy ion collisions / Floerchinger, Stefan (CERN) ; Wiedemann, Urs Achim (CERN) ; Beraudo, Andrea (INFN, Turin) ; Del Zanna, Luca (Florence U. ; INFN, Florence ; Arcetri Observ.) ; Inghirami, Gabriele (Florence U. ; INFN, Florence) ; Rolando, Valentina (INFN, Ferrara ; Ferrara U.)
Initial fluctuations in hydrodynamic fields such as energy density or flow velocity give access to understanding initial state and equilibration physics as well as thermodynamic and transport properties. We provide evidence that the fluid dynamic propagation of fluctuations of realistic size can be based on a background-fluctuation splitting and a systematic perturbative expansion in the fluctuating fields. [...]
CERN-PH-TH-2014-167; arXiv:1408.6384; CERN-PH-TH-2014-167.- 2014-11 - 5 p. - Published in : Nucl. Phys. A 931 (2014) 965-969 Preprint: PDF; External link: Preprint
In : 24th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Darmstadt, Germany, 19 - 24 May 2014, pp.965-969
2.
How (non-) linear is the hydrodynamics of heavy ion collisions? / Floerchinger, Stefan (CERN) ; Wiedemann, Urs Achim (CERN) ; Beraudo, Andrea (CERN ; U. Santiago de Compostela (main)) ; Del Zanna, Luca (Florence U. ; INFN, Florence ; Arcetri Observ.) ; Inghirami, Gabriele (Florence U. ; INFN, Florence) ; Rolando, Valentina (INFN, Ferrara ; Ferrara U.)
We provide evidence from full numerical solutions that the hydrodynamical evolution of initial density fluctuations in heavy ion collisions can be understood order-by-order in a perturbative series in deviations from a smooth and azimuthally symmetric background solution. To leading linear order, modes with different azimuthal wave numbers do not mix. [...]
arXiv:1312.5482; CERN-PH-TH-2013-306; CERN-PH-TH-2013-306.- 2014-07-30 - 6 p. - Published in : Phys. Lett. B 735 (2014) 305-310 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF;

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