A perturbative approach to hydrodynamics

20 May 2014, 10:00
20m
europium (darmstadtium)

europium

darmstadtium

Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk Collective Dynamics Collective dynamics

Speaker

Stefan Floerchinger (CERN)

Description

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. Initial conditions are characterized by a Bessel-Fourier expansion for single events, event-by-event correlations and probability distributions. The evolution equations can be solved order-by-order in the expansion which allows to study the fluid dynamical propagation of single modes, the study of interaction effects between modes, the determination of the associated particle spectra and the generalization of the whole program to event-by-event correlations and distributions. We also show comparisons to flow measurements at the LHC.
On behalf of collaboration: None

Primary author

Stefan Floerchinger (CERN)

Co-authors

Andrea Beraudo (Universidade de Santiago de Compostela (ES)) Gabriele Inghirami (INFN Firenze) Luca Del Zanna (INFN Firenze) Urs Wiedemann (CERN) Valentina Rolando (University of Ferrara (Italy) and INFN (Ferrara))

Presentation Materials