Statut  Confirmé 
Série  IPNX 
Domaines  hepph 
Date  Jeudi 16 Mars 2017 
Heure  11:00 
Institut  CPHT 
Salle  Salle de conférences, bât. 6 
Nom de l'orateur  Attems 
Prenom de l'orateur  Maximilian 
Addresse email de l'orateur  
Institution de l'orateur  University of Barcelona 
Titre  Hydrodynamization and EoSization in nonconformal theories 
Résumé  Ever since fast hydrodynamization has been observed in heavy ion collisions the understanding of the very early nonequilibrium stage of such collisions has been a topic of intense research. We use the gauge/string duality to model the creation of a strongly coupled QuarkGluon plasma in a nonconformal gauge theory. This numerical relativity study is the first nonconformal holographic simulation of a heavy ion collision. We extract new physics as compared to the conformal case such as the nontrivial equation of state and the presence of a sizeable bulk viscosity. Nonconformality gives rise to an increase of the relaxation times of the resulting plasma. Furthermore, if the bulk viscosity is large enough then the plasma becomes well described by hydrodynamics before the equilibrium equation of state becomes applicable. This time we refer to as the EoSization time. This EoSization process is a new nonconformal relaxation channel involving the evolution of energy density and average pressure. It is exciting to see this new channel for bulk viscosity values well below QCD critical temperature estimates. 
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