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SUMMARY:Initialization and fluctuations of QGP fluids in Bjorken expansion
DTSTART;VALUE=DATE-TIME:20230529T121500Z
DTEND;VALUE=DATE-TIME:20230529T124000Z
DTSTAMP;VALUE=DATE-TIME:20261009T213319Z
UID:indico-contribution-365@indico.ipb.ac.rs
DESCRIPTION:Speakers: Tetsufumi Hirano (Sophia University\, Japan)\nWe dis
 cuss two topics in hydrodynamic description of QGP fluids in high-energy n
 uclear collisions. We first constrain the initial conditions in the Bjorke
 n expansion model by considering causality. When the system is far away fr
 om local equilibrium\, the relativistic hydrodynamic equations tend to vio
 late the causality. Within the conformal fluids in one-dimensionally expan
 ding system\, we find initial conditions are largely constrained due to ca
 usality conditions. This sheds a light on importance of core-corona initia
 lization in high-energy nuclear collisions. We next discuss thermal fluctu
 ations during hydrodynamic evolution (a.k.a. hydrodynamic fluctuations) in
  the Bjorken expansion model. We take account of the second order terms\, 
 which are required from causality\, in linear perturbation of Bjorken's eq
 uations and analyze correlation functions of energy density in the longitu
 dinal direction. We find a typical behavior of correlation functions which
  reflect transport properties of the QGP. We also argue generalized consti
 tutive equations from a viewpoint of hydrodynamic fluctuations.\n\nhttps:/
 /events.saifa.rs/event/554/contributions/365/
LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia
URL:https://events.saifa.rs/event/554/contributions/365/
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