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SUMMARY:How to explore initial stages and QGP anisotropy by using high-pt 
 data?
DTSTART;VALUE=DATE-TIME:20230529T124000Z
DTEND;VALUE=DATE-TIME:20230529T130000Z
DTSTAMP;VALUE=DATE-TIME:20261010T134612Z
UID:indico-contribution-366@indico.ipb.ac.rs
DESCRIPTION:Speakers: Stefan Stojku ()\nIn this talk\, we will discuss how
  high-pt data can be used to constrain tau0\, the onset time of energy los
 s and fluid-dynamical evolution\, an important parameter of our descriptio
 n the evolution of QGP created in relativistic heavy-ion collisions. We fi
 rst consider a scenario without pre-equilibrium evolution\, and demonstrat
 e that high-pt data clearly prefers later tau0. Then\, we consider several
  more sophisticated scenarios with pre-equilibrium evolution and show that
  high-pt RAA and v2 are sensitive to different initializations and early e
 xpansion dynamics and that they prefer later onset of energy loss and tran
 sverse expansion.\nMoreover\, we consider the spatial anisotropy of the QG
 P\, as it is one of the main properties of this system. We propose a novel
  method to extract the spatial anisotropy from high pt data. Based on nume
 rical calculations and comparisons with experimental data\, we show that a
  modified ratio of v2 and RAA reaches a well-defined saturation value\, wh
 ich is directly proportional to the time-averaged anisotropy of the evolvi
 ng QGP. We relate this ratio to a new observable\, which we call jet-perce
 ived anisotropy\, and we argue that it can provide constraints on bulk-med
 ium simulations.\n\nhttps://events.saifa.rs/event/554/contributions/366/
LOCATION:SANU (Serbian Academy of Science and Arts) - Belgrade\, Serbia
URL:https://events.saifa.rs/event/554/contributions/366/
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